Why do you need a threaded fitting weight and volume chart?

In engineering design, project procurement, and logistics, accurate knowledge of the weight and volume of various threaded fittings is crucial.

✅ Assisting engineers with equipment load and support design

✅ Providing accurate cost estimates for procurement personnel

✅ Facilitating storage and packaging planning

✅ Providing a basis for volumetric weight calculations for international shipments

By referring to this chart, users can more accurately calculate the total weight and volume of an entire batch of fittings, improving project management efficiency.

Standards and Pressure Classes for Threaded Pipe Fittings

Similar to socket weld fittings, the primary manufacturing standard for forged steel threaded pipe fittings is ASME B16.11. This standard details the dimensions, tolerances, thread type (typically NPT), marking, and material requirements for the fittings.

Threaded pipe fittings are primarily classified into the following pressure classes based on their pressure capabilities:

Class 2000 (2000 lb): Suitable for low- to medium-pressure applications.

Class 3000 (3000 lb): The most common pressure class, used in a wide range of applications.

Class 6000 (6000 lb): Designed for high-pressure applications, it features thicker walls and increased strength.

The higher the pressure class, the thicker the wall and overall dimensions of the fitting, and the heavier its weight.

Threaded Fitting Types

Threaded Elbow

Threaded Tee

Threaded Coupling

Threaded Nipple

Threaded Bushing

Threaded Plug

Threaded Union

Threaded Cap

Our Threaded Fitting Product Specifications

We specialize in manufacturing and exporting a wide variety of threaded forged fittings. Our product range includes:

Standards: ASME B16.11 / MSS SP-79 / MSS SP-83 / BS 3799

Size Range: 1/8” to 4”

Pressure Rating: Class 2000 / 3000 / 6000

Thread Types: NPT, BSP, BSPT, PT

Material:

Carbon Steel ASTM A105 / A350 LF2

Stainless Steel ASTM A182 F304 / F316

Alloy Steel ASTM A182 F11 / F22

Duplex Stainless Steel :2205/2507

Testing and Certification: 3.1 MTC, Dimensional Inspection, Spectroscopic Analysis (PMI), NDT Testing

All products comply with international standards and are suitable for high-temperature, high-pressure, and corrosive environments.

Download the Threaded Fitting Weight and Volume Chart (PDF)

For the convenience of engineers and purchasing departments, we have compiled a detailed

“Threaded Fitting Product Weight and Volume Chart” PDF file.

This document covers the weight and volume data for threaded fittings in sizes from 1/8″ to 4″.

[Click here to download the free PDF Weight and Volume Chart]

The post ASME B16.11 Threaded Fitting Weight/Volume Chart appeared first on Quality Manufacturer of Industrial Pipe Fittings.

Types of Steel Pipe Couplings

Straight Couplings:

As the most fundamental and common coupling type, straight couplings feature identical diameters at both ends. Their smooth inner walls precisely match the pipe’s outer diameter, enabling seamless connection between pipes of the same size for unobstructed medium flow. Their simple structure is typically achieved through one-piece casting or forging. Compatible connection methods include threaded, welded, and compression fittings, allowing flexible selection based on pipeline pressure requirements.

In application scenarios, straight pipe couplings are widely used in low-to-medium pressure conventional piping systems. Material options are diverse: plastic materials (such as PVC, PE) are suitable for civil water supply and drainage; carbon steel is compatible with general industrial piping; stainless steel 304/316 materials can be used in food processing, medical equipment, and other sanitary or mildly corrosive environments.

Reducer Couplings

Reducer couplings connect pipes of differing nominal diameters. Featuring a larger inner diameter at one end and a smaller diameter at the other, they facilitate smooth transitions between pipe sizes. Commonly used to adjust fluid flow rates or adapt to equipment interfaces of varying specifications, they minimize flow resistance at transition points, preventing pressure loss or turbulence caused by abrupt diameter changes.

They are primarily used in systems requiring pipe diameter adjustments, with threaded and welded connections being the main installation methods. For high-pressure applications, forged reducer couplings are often used to ensure structural strength. In low-pressure residential scenarios, injection-molded plastic reducer couplings are commonly employed due to their ease of installation and lower cost.

Full Coupling:

The core advantage of full couplings lies in their uniform wall thickness throughout the entire length, meeting standard pipe wall thickness specifications. Both ends feature complete connection structures capable of withstanding pressures and temperatures equivalent to the pipeline itself. Functioning as an “extension segment” of the pipeline, they can directly replace portions of pipe length while simultaneously connecting two pipeline sections.

Compared to standard couplings, full couplings offer higher pressure ratings, accommodating medium-to-high pressure ranges. They are commonly used in demanding applications such as petrochemical processing, natural gas transmission, and high-pressure steam pipelines.

Half Coupling:

The structural feature of the half coupling (abbreviated as half coupling) is “one end complete, one end simplified”: one end possesses a standard connection structure (such as threaded holes or weld bevels) for tight connection to the pipeline; the other end is a flat or short pipe structure. Its primary function is to create a branch pipe or interface for large pipelines or vessels without cutting or altering the main pipeline structure, making it commonly used for branch connections. Serving as a “connection base” for piping systems, they can be expanded with valves, flanges, and other fittings to enhance pipeline functionality.

Since only one end bears the load, half couplings have a slightly lower pressure rating than full couplings. They are primarily suited for medium-to-low pressure applications, typically connected via welding, with materials matching the equipment or pipeline specifications.

Socket Weld Coupling

The socket weld coupling employs a “socket + insert pipe” connection structure. One end features a socket with a groove, while the other end consists of a short pipe that can be inserted into the pipeline. During installation, the pipe is inserted into the socket until it reaches the bottom, then welded along the socket edge (typically a fillet weld). The welded area forms a sealing ring, effectively preventing medium leakage. Its advantages include superior sealing performance, simplified welding operations with lower technical requirements, and reduced pipeline alignment errors.

Primarily used in medium-to-small diameter, medium-to-high pressure precision pipelines. Due to the gap between the socket bottom and pipe end, it is unsuitable for transporting crystallizing or clogging media.

Threaded Coupling:

A threaded coupling is another type of full coupling. Both ends feature internal threads, connecting to externally threaded pipes through tightening. No welding is required; installation only necessitates tightening with a wrench. In some scenarios, sealing tape or sealant can be used to enhance sealing performance. Disassembly is quick and easy, facilitating pipeline maintenance or modifications. This connection method offers convenient and rapid installation, easy disassembly and replacement, and is suitable for low- to medium-pressure removable pipeline systems.

Carbon Steel Pipe Couplings

Carbon steel pipe couplings are the most common and cost-effective type of pipe coupling. Primarily composed of iron and carbon, they offer excellent strength, hardness, and toughness, meeting the connection requirements for most medium- and low-pressure, non-corrosive piping systems. Due to their outstanding cost-performance ratio, carbon steel pipe couplings are widely used in pipelines transporting ordinary fluids such as water, oil, and gas. However, their primary drawback is poor corrosion resistance, making them unsuitable for humid or highly chemically corrosive environments.

Alloy Steel Pipe couplings

Alloy steel pipe couplings are manufactured by adding alloying elements such as chromium, molybdenum, and vanadium to carbon steel. These additions significantly enhance the couplings’ resistance to high temperatures, high pressures, and wear. Consequently, alloy steel pipe couplings are the preferred choice for demanding industrial environments, such as in petroleum, chemical, and power industries, where they are used in pipeline systems handling high-temperature, high-pressure steam or special media. Their performance surpasses that of carbon steel pipe couplings, though they also carry a relatively higher cost.

Stainless Steel Pipe couplings

Stainless steel pipe couplings are renowned for their exceptional corrosion resistance. Containing at least 10.5% chromium, they form a dense chromium oxide passivation layer that effectively resists various forms of corrosion. Depending on the content of elements like chromium, nickel, and molybdenum, stainless steel pipe couplings are further classified into multiple grades to suit different corrosive environments. Due to their non-toxic, hygienic, and easy-to-clean properties, they are commonly used in highly sanitary applications such as food processing, pharmaceuticals, and drinking water systems. They are also an ideal choice for humid or outdoor environments.

ASME B16.11 Coupling Specification

Socket Weld Coupling Dimension

Threaded Pipe Couplings Dimension

ASME B16.11 Socket Weld coupling Weight and Volume Chart

ASME B16.11 Socket Weld Fittings Weight and Volume Chart

ASME B16.11 Threaded Coupling Weight and Volume Chart

ASME B16.11 Threaded Fittings Weight and Volume Chart

The post  Steel Pipe Coupling Types and Specifications appeared first on Quality Manufacturer of Industrial Pipe Fittings.

What is ASTM B16.11?

This Standard covers ratings, dimensions, tolerances, marking, and material requirements for forged fittings, both socket-welding and threaded, as illustrated in Tables 1 through 5 and Tables I-1 through I-5, inclusive.

Fitting Types/Configuration. Types of fittings covered by this Standard are shown in Table 6, by class and size range. Fittings shown in Tables 1 through 5 and Tables I-1 through I-5 may also be made with combinations of socket-welding and threaded ends.

Special Fittings. Fittings with special dimensions, threads, or counterbores may be made by agreement between the manufacturer and purchaser. When such fittings meet all other stipulations of this Standard, they shall be considered in compliance therewith, provided they are appropriately marked (see section 4).

Welding. Installation welding requirements are not within the scope of this Standard. Installation welding shall be in accordance with the applicable piping Code or regulation covering the piping system into which the fittings are installed.

Forged Fittings Specification

ASTM B16.11 is an international standard for forged fittings, covering both threaded and socket weld types. These high-pressure fittings offer multiple material options, including stainless steel, carbon steel, and high-nickel alloys.

Sizes range from 1/2 inch to 4 inches, with pressure ratings of 2000, 3000, 6000, and 9000. Pressure ratings differ between threaded and socket weld fittings: threaded fittings are rated at 2000, 3000, and 6000, while socket weld fittings are rated at 3000, 6000, and 9000.

Forged fittings are manufactured by forging and machining solid steel stock. They encompass various shapes including elbows, caps, crosses, plugs, tees, caps, nipples and so on. These fittings connect pipes, pumps, valves, and other equipment to form piping systems with diameters less than 2 inches or 4 inches.

Socket weld fittings connect pipes through fillet welds, while threaded fittings connect by screwing into threads. Typically, Grade 3000 fittings are used for 80/XS schedule pipes; Grade 6000 fittings for 160 schedule pipes; and Grade 9000 fittings for thicker-walled pipes (XXS schedule).

Types of Forged Fittings

Socket Weld Fittings

Socket weld fittings are a type of pipe connection, consisting of a socket and a spigot. The socket is the part of the pipe fitting that receives the spigot of another pipe fitting, and the spigot is the part of the pipe fitting that is inserted into the socket. Its outer diameter is slightly smaller than the inner diameter of the socket so that it can be inserted smoothly.

Threaded Fittings

Threaded fittings are fittings with threads, which are connected to other pipe fittings, valves or equipment through threaded connection. Threaded connection is a detachable connection method, which uses the internal or external threads on the pipe fittings to achieve connection and sealing through the screwing of threads.

Socket Weld Pipe Fittings Dimensions

ASME B16.11 Elbow & Tee & Cross Dimensions

ASME B16.11 Coupling & Cap & 45°Lateral Dimensions

Socket Weld Pipe Fittings Weights

SW 90° Elbow & 45° Elbow

SW Tee & Cross

SW Coupling & Cap

Threaded Fittings Dimensions

ASME B16.11 Elbow & Tee & Cross Dimensions

ASME B16.11 Coupling & Boss & Cap Dimensions

ASME B16.11 Plug & Bushing Dimensions

ASME B16.11 Female and Male Threaded 90°Elbow

Threaded Fittings Weights

THRD 90° Elbow & 45° Elbow

THRD Tee & Cross

THRD Coupling & Cap

THRD Head Plug

THRD Hex Head Bushing & Flush Bushing       

The post ASME B16.11 Forged Fittings Dimensions appeared first on Quality Manufacturer of Industrial Pipe Fittings.

What is Alloy Steel?

Alloy steel refers to carbon steel that has been intentionally enriched with one or more alloying elements (such as chromium, nickel, molybdenum, vanadium, tungsten, manganese, silicon, boron, titanium, copper, etc.) to enhance or achieve specific properties. Different alloying elements impart distinct characteristics to alloy steels. For instance, chromium enhances corrosion resistance and oxidation resistance, nickel improves strength and toughness, and molybdenum increases heat resistance and wear resistance. The addition levels of these alloying elements typically exceed the impurity content in carbon steel. Their types and proportions significantly influence the steel’s mechanical properties, corrosion resistance, heat resistance, wear resistance, and other key attributes. Alloy steels are classified by alloy element content into:

– Low-alloy steel (less than 5% alloy elements)

– Medium-alloy steel (5%-10% alloy elements)

– High-alloy steel (greater than 10% alloy elements)

Generally, higher alloy content yields superior steel properties but also commands a higher price.

Advantages of Alloy Steel:

High Strength and High Toughness: Capable of withstanding immense stress without fracturing.

Exceptional Wear Resistance: Widely used in components requiring high wear resistance, such as gears, bearings, and cutting tools.

Superior Corrosion and Heat Resistance: Suitable for corrosive or high-temperature environments in industries like chemical processing and power generation.

Formability and Machinability: Certain alloy steels exhibit enhanced formability and weldability during processing.

Alloy Steel Products & Applications

1. Alloy Steel Plates

Alloy steel plates are thicker than metal sheets, forming flat rectangular steel plates. They are commonly used in pressure vessels, boilers, chemical equipment, and large machinery manufacturing. Featuring high strength, excellent heat resistance, and corrosion resistance, common standards include ASTM A387 and EN 10028.

2. Alloy Steel Pipes & Tubes

Alloy steel pipes and tubes are categorized into seamless and welded types, extensively used in oil and gas, power plants, chemical pipelines, and heat exchangers. Typical grades like ASTM A335 P11, P22, P91 exhibit high-temperature and pressure resistance.

3. Alloy Steel Sheets

Alloy steel sheets feature reduced thickness and are primarily used in automotive manufacturing, home appliances, precision machinery, and architectural decoration. Produced via cold-rolling or hot-rolling processes, these sheets offer superior surface quality and ease of further processing.

4. Alloy Steel Bars & Rods

Alloy steel bars and rods come in various shapes, sizes, and grades. They are predominantly used in mechanical components, bearings, gears, and tool manufacturing. Common supply forms include round bars, square bars, and hexagonal bars, offering high strength, wear resistance, and excellent machinability.

5. Alloy Steel Wires

Alloy steel wires are primarily used in springs, steel cables, fasteners, and welding wires. They feature high toughness, high strength, and good tensile properties.

6. Alloy Steel Castings

Alloy steel castings are produced by pouring molten steel into molds, commonly used for manufacturing engine blocks, gears, and other high-stress components. Castings made through this process are widely applied in pumps, valves, turbines, and marine parts, capable of withstanding heavy loads and complex operating conditions. Their advantage lies in achieving complex shapes in a single casting operation.

7. Alloy Steel Forgings

Forgings are produced by shaping heated steel into desired forms using forging presses. Alloy steel forgings feature high strength and density, commonly used in high-pressure vessels, pressure pipelines, mechanical shafts, flanges, and similar applications. The forging process enhances material fatigue resistance and structural reliability.

8. Alloy Steel Butt Weld Fittings

Includes elbows, tees, reducers, closures, and other components widely used in piping systems. These fittings exhibit excellent performance and corrosion resistance under high-temperature and high-pressure conditions, typically manufactured to ASME B16.9 and MSS-SP-75 standards.

9. Alloy Steel Flanges

Alloy steel flanges are manufactured from various types of alloy steel. They come in different sizes and types, with nominal diameters ranging from 1/2 inch to 48 inches. Used to connect pipes and equipment, common types include butt-weld flanges, slip-on flanges, and blind flanges. Widely applied in petroleum, natural gas, power generation, and chemical industries, they comply with ASME, DIN, and EN standards.

10. Alloy Steel Bolts & Nuts

Alloy steel fasteners offer high strength and corrosion resistance, suitable for high-pressure pipelines, pressure vessels, and mechanical equipment. Common standards include ASTM A193 and A194, widely used in high-temperature and high-pressure applications.

Alloying Elements

Aluminum—Removes phosphorus, sulfur, and oxygen from steel

Chromium—Enhances toughness, hardness, and wear resistance

Copper—Improves corrosion resistance and toughness

Manganese – Improves high-temperature strength, wear resistance, ductility, and hardenability

Nickel – Enhances corrosion resistance, oxidation resistance, and strength

Silicon – Increases magnetic properties and strength

Tungsten – Boosts strength and hardness

Vanadium – Improves corrosion resistance, impact resistance, strength, and toughness

Why Choose ZIZI as Your Trusted Alloy Steel Supplier

Product Quality: This is the primary consideration when selecting suppliers and manufacturers. ZIZI’s alloy steel products strictly comply with relevant international, national, and industry standards, such as ASTM (American Society for Testing and Materials) and ISO (International Organization for Standardization).

Product Range and Customization Capabilities: Different industries and projects have varying demands for alloy steel, including distinct shapes, specifications, and performance requirements. Customization capability is equally vital. ZIZI develops and manufactures tailored alloy steel products based on clients’ specific requirements.

Production Capacity and Delivery Lead Times: For large-scale industrial projects, a supplier’s production capacity directly impacts project timelines. We flexibly adjust production schedules to meet urgent client needs, ensuring delivery within the shortest possible timeframe.

Industry Experience and Reputation: Experience is invaluable in the alloy steel sector. Companies with extensive operational history and expertise possess deeper insights into industry trends and customer needs, enabling them to deliver more professional solutions.

Pricing and Cost-Effectiveness: While price isn’t the sole deciding factor, reasonable pricing is crucial for businesses to control costs while ensuring product quality.

Conclusion

In today’s fiercely competitive market, alloy steel suppliers have evolved beyond mere vendors to become strategic partners for their clients. Selecting an alloy steel manufacturer with specialized expertise, rigorous quality control, and exceptional service capabilities will lay a solid foundation for your project’s success.

We are committed to delivering high-quality alloy steel and specialty steel products while prioritizing customer-centric, professional customized solutions. If you are seeking a reliable partner, feel free to contact us anytime to discuss your project requirements.

The post Alloy Steel Products Suppliers & Manufacturers appeared first on Quality Manufacturer of Industrial Pipe Fittings.

What is a union ?

A union, also known as a union joint, is a component used for removable connections between pipes. It typically consists of three parts: a male end, a female end, and a gasket. The male and female ends are connected to the two pipes to be joined, achieving a tight seal through threaded connections, while the gasket serves as a seal to prevent leakage of the medium inside the pipes.

Compared to traditional welding or flange connections, the most significant feature of union is their removability. This feature makes pipeline installation, maintenance, and replacement more convenient, eliminating the need for destructive operations on the pipeline, significantly improving work efficiency, and reducing maintenance costs.

MSS SP-83 Pipe Union Specification

Structural Advantages of Union ​

Excellent Sealing Performance: The gasket is the key to ensuring the sealing performance of union. High-quality gaskets fit tightly to the male and female ends, effectively preventing medium leakage and ensuring the safe operation of the pipeline system.​

Easy Installation and Removal: When maintenance or component replacement is required, simply disassemble the union, complete the operation, and then retighten it, saving time and effort.​

High adaptability: Union couplings can accommodate connections between pipes of different diameters and materials. Whether it is metal or plastic piping, as long as the thread specifications match, union can be used for connection.

Material & Grades of Forged Unions:

Carbon Steel Threaded Flanges :
Carcon Steel: ASTM A105 / A105N,ASTM A350 LF2 / LF3, A694 F42 / 46 / 52 / 56 / 65 / 70

Alloy Steel Threaded / Screwed Flanges :
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91

Stainless Steel Threaded Flanges :
ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L

Duplex & Super Duplex Steel Threaded Flanges :
ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61

Copper Alloy Steel Threaded Flanges :

 ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200

Nickel Alloy Threaded Flanges :
ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No.N10276), Alloy 20 (UNS No. N08020)

Types of Unions

Socket Weld Union:

Socket welding involves inserting a steel pipe into a socket hole for welding, hence the term socket weld union. A socket coupling consists of a socket, a spigot, and a socket groove, with the distinctive feature of a socket groove on the spigot, and the spigot and socket located at opposite ends. Socket unions can be widely applied to pipes of various diameters and are also suitable for water meters and valves. Due to the socket structure, pipe joints reduce costs and offer extremely convenient installation, use, and maintenance, while also providing excellent leak prevention capabilities, making them highly promising in the market.

Threaded Union:

Threaded unions are the most common type of joint, characterized by using a threaded connection method for pipe connections. They primarily consist of three parts: a male end with external threads, a female end with internal threads, and a nut. By rotating the nut, the sealing surfaces of the male and female ends can be tightly aligned, thereby achieving connection and sealing. Thread forms can include BSP, NPT, G, etc., and the connection is further secured using a locking nut and a seal ring. Suitable for small-diameter pipes, threaded connections achieve pipe sealing. They are easy to install and commonly used in water pipes, gas pipes, and other applications.

Class 3000 Socket Weld Union Dimension

CLASS 3000 Threaded Union Dimensions

Union Pipe Fittings Applications

Water treatment systems

Petrochemical pipelines

Heating, ventilation, and air conditioning (HVAC) systems

Pharmaceutical and food industry piping

Laboratory and research piping systems

How to Choose the Right Union Pipe Fitting?

Working medium and temperature: Determine the type of fluid and temperature, and select the appropriate material.

Working pressure: Ensure that the pressure rating of the union fitting exceeds the working pressure of the system.

Pipe size: Match the outer diameter, inner diameter, and thread specifications of the pipe.

Installation and Maintenance of Union Fittings

Installation: Before installation, clean the threads of the pipe and union fitting to remove debris and burrs. During installation, connect the male and female ends to the pipe separately, ensuring the tightening force is appropriate to avoid over-tightening or under-tightening. Additionally, ensure the gasket is properly installed to provide effective sealing.

Maintenance: Regularly inspect the union quick-connect fitting for leaks, loosening, or other issues. If the gasket is found to be aged or damaged, it should be replaced promptly. For pipeline systems that are not in use for extended periods, the quick-connect fitting should be disassembled, cleaned, and lubricated regularly to prevent thread rusting and seizing.

The post Union Pipe Fittings  appeared first on Quality Manufacturer of Industrial Pipe Fittings.

It generally complies with the American Standard MSS SP-95, with common materials including carbon steel, stainless steel, and alloy steel, to accommodate various working environments and engineering requirements. Connection types include butt-welded and threaded connections. They are primarily used in industries such as petrochemicals, pharmaceuticals, healthcare, power generation, aerospace, defense, fire protection, metallurgy, shipbuilding, natural gas, nuclear power, and environmental protection, where high pressure resistance and precise dimensions are required.

Swage Nipple Specification

Material & Grades of Forged Fittings 

Carbon Steel :
Carcon Steel: ASTM A105 / A105N,ASTM A350 LF2 / LF3, A694 F42 / 46 / 52 / 56 / 65 / 70

Alloy Steel :
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91

Stainless Steel :
ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L

Duplex & Super Duplex Steel :
ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61

Copper Alloy Steel :

 ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200

Nickel Alloy :
ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No.N10276), Alloy 20 (UNS No. N08020)

Different Types are Suitable for Different Pipelines

Concentric swage nipple: The centerlines of the two connected pipes are aligned in a straight line. This type is primarily used in vertical pipelines. In some vertical water supply or gas supply pipeline systems, concentric reducers ensure stable fluid flow in the vertical direction, reducing resistance and turbulence caused by changes in pipe diameter.

Eccentric swage nipple: Primarily used in horizontal pipelines. For example, in horizontal oil transportation pipelines, eccentric reducers can be adjusted to accommodate height differences between pipes as needed to meet process requirements or avoid interference with other equipment. Additionally, in applications requiring control of fluid flow direction and velocity, eccentric reducers can play a unique role.

In small-diameter pipelines (DN50 and below), swage nipples are often used to replace reducer fittings for pipeline diameter changes. Compared to reducer fittings, swage nipple offer better cost-effectiveness and installation convenience in certain situations, meeting the flexible and varied design requirements of small-diameter pipeline systems.

MSS SP – 95 Swage Nipple Dimensions

Swage Nipple Weight Chart in kg

Nomenclature According to the Ends of the Reduced Nipple

Bevel of Both Ends ( BBE)

Plain of Both Ends ( PBE)

Thread of Both Ends ( TBE)

Bevel of Large End / Plain of Small End ( BLE/PSE)

Bevel of Large End / Thread of Small End ( BLE/TSE)

Plain of Large End / Thread of Small End ( PLE/TSE)

Plain of Large End / Bevel of Small End ( PLE/BSE)

Thread of Large End / Bevel of Small End ( TLE/BSE)

Bevel of Large End / Thread of Small End ( BLE/TSE)

Difference between Swage Nipple and Reducer

Although swage nipple and reducer fittings both belong to the category of pipe size transition fittings, they differ significantly in structure and application. swage nipple are forged short pipe fittings with a shorter length, primarily used in small-diameter pipes. They often replace reducer joints to achieve size transitions and offer diverse connection methods, including beveled edges, threads, and flat ends, making them suitable for high-pressure and frequent disassembly scenarios.

Reducers, on the other hand, are typically formed through stamping or welding, with relatively longer lengths, and are suitable for large-diameter pipeline systems. They are divided into concentric and eccentric types, primarily used for transition connections between pipelines of different diameters. In fluid transportation, they prioritize minimizing resistance, with welding being the primary installation method. They are widely applied in large-scale pipeline engineering projects such as chemical and water conservancy industries.

Applications

Oil and gas pipeline modification or repair

High and low pressure system interface connections

Connection of instrumentation equipment to main pipelines

Temporary connections and transition joints in industrial installations

Connection between hydraulic systems and pipeline fittings

The post MSS SP-95 Swage Nipple appeared first on Quality Manufacturer of Industrial Pipe Fittings.

Goods List as Below:

Products Photos

Packaging

Individual Packaging: Each forged part is individually wrapped in rust-proof paper, bubble wrap, or pearl cotton to prevent collisions and scratches.

Shock-Absorbing Filling: The individually packaged forged parts are placed in sturdy cardboard or plastic boxes, with the interior filled with shock-absorbing materials such as foam, shredded paper, or air cushion bags.

Vacuum packaging/aluminum foil bag packaging: For precision forgings with extremely high requirements for moisture resistance and corrosion prevention, vacuum-sealed or inert gas-filled (e.g., nitrogen) aluminum foil bags are used to isolate oxygen and moisture.

Wooden boxes/wooden frame boxes: For heavier forgings or those requiring enhanced protection, closed wooden boxes or framed wooden boxes are used, with internal fixed brackets or cushioning materials as needed.

ASTM A105 Forged Fittings Chemical Composition

ASTM A105 Forged Fittings Mechanical Property

ASTM A105 Threaded Fittings Dimensions

Coupling & Boss & Cap

Plug & Bushing

Types of ASME B16.11 Threaded Fittings

Threaded Elbow

A threaded elbow is a pipe fitting used to change the direction of a pipe, with threads on one or both ends. It usually consists of an elbow body and a threaded part. The bending part of the elbow body is generally 90° or 45°.

Threaded Tee

Threaded Tee is usually used in some low-pressure small-diameter pipeline systems. It can divide the pipeline into three branches and form a 90-degree angle between the three branches.

Threaded Cross

Threaded Cross is a pipe connector with four openings, usually used to divide the pipe system into four different directions to achieve the diversion of the medium.

Threaded Coupling

The threaded coupling is a simple but important pipe connection fitting. Its main structure is a hollow cylinder with threads inside. The threads at both ends of the couplings are usually of the same specification so that it can be connected to threaded pipes of the same diameter.

Threaded cap

A threaded cap is a pipe fitting used to close the end of a pipe. It is mainly composed of a cap body and a threaded part. The cap body is a hemispherical or flat-top structure with a hollow interior to fit the outer diameter of the pipe. The threaded part is located at the open end of the cap body and is usually machined with internal or external threads, depending on the thread type of the pipe or pipe fitting it matches.

Threaded Nipple

A nipple, as the name implies, is a short tube with threads on both ends. Depending on the type of thread, it can be categorized into various forms, such as double male nipple with male threads on both ends, or male and female nipple with male threads on one end and female threads on the other.

Threaded Bushing

A bushing, also known as a buchen or reducer, is a type of tubing used for connecting different sizes of threaded fittings. It has a female thread on one end and a male thread on the other, and is used to convert between large and small diameters by matching the internal and external threads.

Threaded Plug

Plugs are threaded pipe fittings used to close off the end of a pipe or an unused connection. They come in two main forms, caps, which are usually used to close off the outside of a pipe, and plugs, which are usually used to close off the inside threads or ports of a pipe.

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

The post ASTM A105 Threaded Fittings Order appeared first on Quality Manufacturer of Industrial Pipe Fittings.

The thread angle of the NPT thread is 60°. This angle design provides the thread with a certain degree of self-locking capability and good load-bearing capacity during connection. In harsh operating conditions such as high pressure and high temperature, the 60° thread angle helps ensure the stability of the connection. It is primarily used for pipe connections in the United States and North America and is widely applied in pipeline systems across industries such as petroleum, natural gas, and chemicals.

Historical Background

The onset of the Industrial Revolution increased the demand for standardized threads. With the emergence of new manufacturing processes, various types of threads began to appear, leading to compatibility issues between different manufacturers and users. In 1841, British engineer and inventor Sir Joseph Whitworth established a unified thread standard to address this issue. His thread design was based on a 55-degree thread angle, featuring rounded roots and peaks. This became the widely accepted pipe thread standard at the time and was known as the British Standard Pipe Thread (BSP).

In 1864, American engineer William Sellers proposed a new set of standards for bolts, screws, and nuts. His design featured a 60-degree angle, with thread profiles having flat root and crest surfaces, making them easier to manufacture and produce. Sellers’ design, known as NPT threads, gained widespread recognition and played a crucial role in the American Industrial Revolution. NPT threads were eventually adopted as the standard thread in North America.

ZIZI is committed to providing customers with products and services that exceed user expectations. For more information on threaded products and solutions, please contact the ZIZI sales team.

Other Common American Thread Types

NPT: National Standard Pipe Taper Thread

NPSC: National Standard Straight Pipe Fitting Pipe Thread

NPTR: National Standard Tapered Rail Pipe Thread

NPSM: National Standard Straight Mechanical Pipe Thread

NPSL: National Standard Straight Lock Nut Pipe Thread

NPTF: National Standard Tapered Pipe Thread (Dry Seal)

BSPP: British Standard Pipe Parallel Thread

BSPT: British Standard Tapered Pipe Thread

NPSF: National Straight Fuel Pipe Thread

NPSH: National Standard Straight Hose

NPT Thread Chart

Cone-shaped Sealing Principle

The taper of NPT threads is key to achieving a seal. When the internal thread and external thread (pipe) are tightened, the thread sides compress and deform against each other, creating a tight metal-to-metal contact that achieves a leak-proof seal. To enhance sealing performance, thread sealant or PTFE tape is typically used in conjunction with the threads.

NPT Thread Feature

Taper: The taper of NPT threads is standardized, typically 1:16, corresponding to an angle of approximately 1°47′24″ between the thread axis and the taper surface.

Thread angle: The thread profile angle is 60 degrees.

Thread crest and root: The thread crest and root are relatively flat.

Dimension naming: NPT thread dimensions are typically denoted by their nominal diameter, such as 1/2″ NPT. However, it is important to note that this nominal diameter does not represent the actual thread outer diameter but rather the approximate inner diameter of the pipe.

Advantages of NPT Thread

The tapered design provides strong sealing performance, making it suitable for high-pressure applications.

The NPT thread design is specifically engineered to achieve sealing through thread contact, eliminating the need for additional O-rings or gaskets.

It prevents sealant contamination of the medium, making it suitable for sensitive applications such as fuel and lubricants.

Strict dimensional parameters ensure good interchangeability between products from different manufacturers, making them widely compatible in North America and regions adhering to related standards.

Disadvantages of NPT Threads

High processing precision requirements necessitate specialized tools, resulting in higher processing costs.

Although designed for sealing, NPT threads still have spiral leakage paths between the thread peaks and valleys, so thread sealant is almost always required to ensure complete leak prevention.

Each disassembly and reassembly may cause some wear or deformation to the threads, reducing their sealing performance. In non-North American regions, its versatility is inferior to BSP threads, potentially increasing procurement and compatibility challenges.

NPT vs. BSP

NPT Thread (American Standard)

NPT thread, also known as the American National Standard Tapered Pipe Thread (National Pipe Taper Thread), is widely used in North America. The thread angle of NPT thread is 60°, and the thread peaks and valleys are relatively flat.

The most distinctive feature of NPT threads is their tapered design, meaning the thread diameter gradually decreases from one end to the other. To ensure more reliable sealing, thread sealant or packing tape is typically used to fill any small gaps.

BSP Thread (British Standard)

BSP thread, or British Standard Pipe Thread, is more commonly used in Europe, Asia, Australia, and many Commonwealth countries. BSP thread is primarily divided into two types:

BSPT: Similar to NPT, BSPT is also a tapered thread that provides sealing through the thread’s own taper. However, BSPT has a thread angle of 55°, and the thread peaks and valleys are curved.

BSPP : BSPP threads are straight threads (parallel threads), meaning their diameter remains constant throughout the entire thread length. Therefore, BSPP threads do not inherently possess conical sealing capabilities and instead rely on additional gaskets, O-rings, or face seals, achieving leak-proof connections by compressing these sealing elements.

Installation

Thread sealant: Thread sealants such as PTFE tape or pipe coatings can enhance sealing, especially in high-pressure or critical applications.

Proper tightening: Avoid over-tightening, as this may damage the threads. Typically, threads should first be tightened by hand, then tightened one to two turns with a wrench.

Inspection: Before installation, always inspect the threads for damage or defects to ensure a safe and effective seal.

Conclusion

In various industrial applications, NPT threads play a crucial role in ensuring safe, leak-proof connections. Understanding their characteristics, types, and optimal installation methods can significantly enhance the reliability and safety of threaded pipe connections. Whether you are working with hot/cold water pipes, gas distribution, hydraulic systems, or fire protection systems, the NPT threads provided by ZIZI are reliable, high-performance components you can trust.

The post What is NPT Thread appeared first on Quality Manufacturer of Industrial Pipe Fittings.

Since the inquiry is a tender, we fully supported our customer while end user proposed new demand, such as COC certificate etc. In this process, both of us treated seriously and check each item carefully when there’s update. Thankfully, we won the bid and got order 2 months later.

Alloy steel is widely used in high-demand fields such as petroleum, natural gas, chemical industry, electric power, boiler, nuclear energy, shipbuilding, machinery manufacturing, etc. due to its excellent high-temperature strength, corrosion resistance and pressure resistance. ZIZI professionally provides a full range of alloy steel pipes, pipe fittings and flanges to meet the stringent requirements of different industries for strength, temperature and pressure.

Product List

Alloy Steel Pipes Inspection photos

Alloy Steel Pipes Fittings Inspection photos

Alloy Steel Flanges Inspection photos

Alloy Steel Pipe Specification

ASTM A335 Alloy Steel Pipe Chemical Composition

ASTM A335 Alloy Steel Pipe Mechanical Property

Features

High strength and toughness: Able to withstand greater pressure and external impact.

Excellent temperature resistance: Can maintain sufficient strength and creep resistance at high temperatures, and still maintain good toughness at low temperatures, and is not prone to brittle fracture.

Excellent corrosion resistance: By adding elements such as chromium and nickel, the oxidation resistance and corrosion resistance are significantly improved.

Good weldability and processability: Most alloy steel pipes have good welding performance and are easy to carry out subsequent processing and installation.

Alloy Steel Pipes Fittings Specification

Classification of Alloy Steel Pipe Fittings

1. Classification by product type

This is the most common classification method, which is distinguished according to the function and shape of the pipe fittings:

Threaded Fittings:

Features: The pipe fittings have threads inside or outside, and are connected to the pipe by screwing with threads. Installation and removal are convenient and quick, and no welding is required.

Common types: Threaded elbows, threaded tees, threaded nipples, threaded couplings, threaded unions, threaded plugs, etc.

Socket-Weld Fittings:

Features: The pipe fittings have a socket at one or both ends. After the pipe is inserted into the socket, it is connected by external fillet welding.

Common types: Socket-Weld elbows, socket-Weld tees, socket-Weld reducers, socket-Weld couplings, socket-Weld unions, socket-Weld pipe caps, etc.

Alloy Steel Flanges Specification 

ASTM A182 Alloy Steel Pipe Fittings & Flanges Chemical Composition

ASTM A182 Alloy Steel Pipe Fittings & Flanges Mechanical Property

Alloy Steel Flanges Types:

Welding Neck Flange

Slip On Flange

Socket Weld Flange

Threaded Flange

Blind Flange

Lap Joint Flange

Dimensions and Standards

The dimensions of alloy steel pipes, fittings and flanges also follow strict international and national standards to ensure interchangeability and system compatibility. The main standards include:

Pipes: ASTM A335 (seamless ferritic alloy steel pipes for high temperature applications), ASTM A213 (seamless ferritic and austenitic alloy steel pipes for boilers, superheaters and heat exchangers), etc.

Fittings: ASME B16.9 (factory-made butt-weld fittings), ASME B16.11 (socket-weld and threaded forged fittings), etc.

Flanges: ASME B16.5 (pipe flanges and flange fittings, sizes NPS 1/2 to NPS 24), ASME B16.47 (large diameter steel flanges, sizes NPS 26 to NPS 60), etc.

The post Alloy Steel Pipes & Fittings & Flanges order appeared first on Quality Manufacturer of Industrial Pipe Fittings.

Forged fittings are produced through forging processes, where forging machinery applies pressure to metal billets, causing plastic deformation to achieve pipe fittings with specific mechanical properties, shapes, and dimensions. Depending on the type and requirements of the fittings, forged fittings are primarily manufactured using die forging, free forging, and machining processes. They are typically used in small-diameter (NPS ≤ 4″) high-pressure systems and are primarily classified by connection method into socket weld fittings and threaded fittings.

Understanding Class 3000 and Class 6000

The “Class” designation indicates the maximum pressure the fitting can safely withstand at a given temperature, typically at room temperature. The numbers (3000 and 6000) roughly correspond to the maximum pressure in pounds per square inch (psi) the fitting is designed for. Sometimes, these classes are abbreviated as “3M” and “6M,” where “M” stands for 1000.

Specifications of Forged Fittings:

Manufacturing Standards

Class 3000/6000 forged pipe fittings must strictly adhere to a series of manufacturing standards. Common standards include ASME B16.11, which provides detailed specifications for the types and designations, pressure ratings, connection sizes, shapes and tolerances, materials, manufacturing, heat treatment, inspection and testing, and marking requirements for forged socket weld and threaded pipe fittings. In terms of material selection, the standards cover a variety of materials, including carbon steel, alloy steel, and stainless steel. Different materials are suitable for different working environments; for example, carbon steel is commonly used in general industrial piping systems, while stainless steel performs exceptionally well in piping systems requiring corrosion resistance.

Additionally, standards such as GB/T 14383, MSS – SP – 79, MSS SP – 83, MSS SP – 95, MSS SP – 97, and BS 3799 impose constraints on the production and manufacturing of forged pipe fittings from various perspectives to ensure the stability and reliability of product quality, thereby meeting the stringent requirements of various industrial sectors for the quality and performance of pipe fittings.

Class 3000 / 6000 Socket Weld Fittings

Class 3000/6000 socket weld fittings are a type of high-strength forged connection components designed for high-pressure, small-diameter pipeline systems. Their key feature is the use of socket welding to connect to pipelines, offering excellent sealing performance and structural strength. They are widely applied in industries such as petroleum, natural gas, chemicals, power generation, shipping, and high-temperature, high-pressure systems. The socket welding structure allows the pipeline to be inserted into the fitting’s port to form a weld, simplifying welding operations while effectively preventing leaks. This makes them ideal for pipeline systems subject to frequent vibration and impact.

Types of Socket Weld Fittings

Socket Weld Cap

Socket Weld Elbow

Socket Weld Tee

Socket Weld Cross

Socket Weld Coupling

Socket Weld Union

Socket Weld Fittings Dimensions

Class 3000 / 6000 Threaded Fittings

Class 3000/6000 threaded fittings are forged connectors designed for high-pressure, small-diameter pipeline systems, connecting to pipelines or equipment via internal or external threads. These fittings require no welding, making them easy to install and dismantle, and are particularly suitable for flammable, explosive, or frequently maintained environments such as petroleum, natural gas, chemical, and power plant industries. Threaded pipe fittings offer excellent sealing performance and pressure resistance, making them critical connection components in high-temperature, high-pressure, and corrosive environments.

Types of Threaded Fittings

Threaded Elbow

Threaded Tee

Threaded Cross

Threaded Coupling

Threaded Cap

Threaded Union

Threaded Nipple

Threaded Hex Nipple

Threaded Swage Nipple

Threaded Plug

Threaded Bushing

Threaded Fittings Dimensions

Material & Grades of Threaded Flanges :

Carbon Steel Threaded Flanges :
Carcon Steel: ASTM A105 / A105N,ASTM A350 LF2 / LF3, A694 F42 / 46 / 52 / 56 / 65 / 70

Alloy Steel Threaded / Screwed Flanges :
ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91

Stainless Steel Threaded Flanges :
ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L

Duplex & Super Duplex Steel Threaded Flanges :
ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61

Copper Alloy Steel Threaded Flanges :

 ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200

Nickel Alloy Threaded Flanges :
ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No.N10276), Alloy 20 (UNS No. N08020)

Quality Control and Testing

We adhere to a rigorous quality management system to ensure that every threaded pipe fitting meets international standards:

Material Testing (PMI Material Spectral Analysis)

Dimension Tolerance Inspection (Thread Gauges, Go/No-Go Gauges)

Pressure Testing (Hydrostatic/Pneumatic)

Mechanical Property Testing (Hardness, Tensile Strength, Impact Resistance, etc.)

Surface Treatment (Acid Washing, Sandblasting, Anti-Rust Oil)

Third-Party Inspection Reports Available (SGS, BV, TÜV)

Applicable industries

Oil & Gas Industry

Chemical and Fine Chemical Plants

LNG / Cryogenic Engineering

Energy & Power (Thermal, Nuclear)

Food & Pharmaceutical Machinery Piping Systems

Offshore Platforms & Offshore Equipment

You can get an offer for products in below material forms:

-Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)

-Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )

-Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)

-Round bar , Billet (ASTM A276, ASTM A479)

– Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)

-Bolting, Nuts（ASTM A193, A194, A320）

Class 3000 / 6000 Forged Fittings Exported Countries

We Export Class 3000 / 6000 Forged Fittings to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan,  Europe, Africa, Asia, North America, South America, Middle East.etc

The post Class 3000 / 6000 Forged Fittings appeared first on Quality Manufacturer of Industrial Pipe Fittings.