ZIZI is a professional manufacturer specializing in the production and processing of pipes and fittings. Our pipes and pipe fittings are primarily used in industries such as chemicals, petroleum, natural gas, water conservancy, power, and marine engineering. Our product range includes various sizes of seamless pipes, welded pipes, butt-welded pipe fittings, high-pressure forged pipe fittings, and flanges. Materials used include carbon steel, stainless steel, alloy steel, low-temperature steel, duplex steel, and base alloys.Welcome to contact us.

Products Lists

Inspection Photos

ASME B16.5 Forged Flange Specification

ASTM A105 Carbon Steel Flange Chemical Composition

ASTM A105 Carbon Steel Flange Mechanical Property

ASTM A182 F316L Flange Chemical Composition

ASTM A182 F316L Flange Mechanical Property

ASTM A182 F51 Flange Chemical Composition

ASTM A182 F51 Flange Mechanical Property

Class 150 Flange Dimension

How to Choose?

When selecting carbon steel flanges and stainless steel flanges, the following factors should be primarily considered:

Medium characteristics: If the fluid is a corrosive medium (such as acids or alkalis), stainless steel flanges must be selected. If the medium is ordinary water or oil, carbon steel flanges are more cost-effective.

Environmental conditions: If the flange is installed in a corrosive environment such as a humid or high-salt fog environment, stainless steel flanges provide better protection and reduce maintenance costs.

Budget: Under the premise of meeting performance requirements, if the budget is limited, carbon steel flanges are an economical choice.

Sanitary requirements: In the food and pharmaceutical industries, for sanitary reasons, only stainless steel flanges are typically permitted.

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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）

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Carbon Steel 90 Degree Elbow

Carbon steel 90 degree elbow is a common type of pipe fittings, and common connection methods include butt welding, thread, and socket weld. We manufacture according to ASME B16.9 and B16.11 standards. ASTM A234 WPB elbow is a commonly used elbow in the petroleum and natural gas industry.

We have supplied our butt weld fittings to major customers which business in Oil & Gas, Chemical & Petrochemical, Water treatment, Nuclear & Power Plant, Offshore platform & Shipbuilding. Our products are applicable for any kinds of severe operating condition such as high pressure and high temperature or cryogenic condition.

ASTM A105 90 Degree Elbow

ASTM A105 is mainly made of carbon steel material grade, and they are used for making forged pipe fittings. Carbon Steel 90 degree elbow is used to change the direction of pipeline flow.Forged 90 degree elbow is used for pipes with smaller diameters, and they are ideal to be used in a high-temperature application in a pressure system. We manufacture ASTM A105 elbow, which is very easy to use and needs low maintenance. It is one of the main reasons behind its popularity in various industries.

Chemical Composition

Mechanical Properties

Dimension of Threaded Elbow

Dimension of Socket Weld Elbow

ASTM A234 Carbon Steel 90 Degree Elbow

ASTM A234 is standard specification for wrought carbon steel & alloy steel pipe fittings which covers seamless and welded types.

The specification for the carbon steel 90 degree elbow, covers steel pipe fittings such as the carbon steel elbow A234 WPB which are primarily used in applications for the pressure piping systems. Generally these Elbow A234 Wpc fittings are designed to be used in moderate and high temperature applications . The A234 SR elbow is the standard of pipe fittings material, which indicates the materials properties of different kinds of carbon steel and alloy steel. One such steel grade in this standard is the WPB . In the term WPB, W means weldable, P stands for pressure, while B is grade b. B refers to the minimum yield strength, such as the ASTM A106/A53 Gr.B or API 5L Gr.B. A234 WPB, which is the most common material used in the manufacture of carbon steel pipe fittings.

W = WELDABLE / wrought

P = RELATED TO P NUMBER OF ALLOY MATERIAL

B = REFER TO MINIMUM YIELD OF MATERIAL

Long Radius & Short Radius Elbow

There are two main types of 90 degree elbows long radius (LR) and short radius (SR) elbows. Long-radius elbows have a longer center line radius than the pipe diameter, making them less abrupt in the change of direction. They are mainly used in low-pressure and low-velocity systems.

Long Radius Carbon Steel 90 Degree Elbow

Fittings that change direction in a piping system are called elbows which available in 90 degree long radius elbow. Both of them has the center line at 1.5 x NPS from elbow end.

Short Radius Carbon Steel 90 Degree Elbow

Short radius elbow almost same as above long radius, The difference is center line to end is 1 x NPS and available in 90 degree only.

Chemical Composition

Mechanical Properties

Dimension of Butt Weld Elbow

Carbon steel butt weld fittings use seamless or welded pipe as starting material and process to the shape of elbows, tees & reducers by hot and cold forming.

China manufacturer supplies various of carbon steel butt weld fittings, they are 90 degree elbow, straight and reducing tee, concentric and eccentric reducer, cap, stub end. Why more and more people choose butt welding even if the operation is difficult?

Leak proof and Strong

Good Strength

Corrosion Resistance

Low Cost

Universal and Economical

Large Output

Wild Application

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Purchase Order List

What is Carbon Steel Hex Bushing

Carbon steel hex bushing is used to reduce the size of female threads from a larger to a smaller diameter. Hex Bushings are threaded fittings that have male threads on the outside and female threads on the inside with a hex head used to tighten the fitting into the threaded opening.

ASME B16.11 forged threaded bushing has hex head bushing, flush bushing and reducing bushing. They are manufactured in accordance with ASME standard. Carbon steel hex bushing is common used material. They do not require welding, so easy to install and modify for adding to these systems. Carbon stee hex bushing is similar as plug, the difference is the solid or hole. They are used for closing off the end of different pipes and fittings .The final function is leak proof.

Feature of ASTM A105 Material

ASTM A105 is the most commonly used carbon steel material grade that used to manufacture forge piping components . This carbon steel material grade is used for ambient- and higher-temperature service in pressure systems.

Chemical Composition

Mechanical Properties

Specification of ASME B16.11 Carbon Steel Hex Bushing

The best known and most widely used connection where the pipe thread provides both the mechanical joint and the hydraulic seal is the American National Pipe Tapered Thread, also referred to as NPT. NPT has a tapered male and female thread that seals with Teflon tape or jointing compound.

NPT is NATIONAL PIPE TAPER (AMERICAN) – Thread form per ANSI/ASME B1.20.1

NPS is NATIONAL PIPE STRAIGHT (PARALLEL) – Thread form per ANSI/ASME B1.20.1

NPTF is NATIONAL PIPE TAPER FOR FUEL – Thread form per SAE J476

NPSM is NATIONAL PIPE STRAIGHT MECHANICAL – Thread form per ANSI/ASME B1.20.1

ASME B16.11 Carbon Steel Hex Bushing Dimensions

Forged Threaded Bushing Weight Chart in kg

Inspection

On site inspection of carbon hex bushing size.

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Carbon Steel ASTM A105 Threaded Fittings

Carbon steel forged fittings are in large demand, and Grade ASTM A105 is the most popular. This alloy is forged at between 1,700 degrees Fahrenheit and 2,200 degrees Fahrenheit, followed by quenching and tempering. It contains Manganese and silicon which can improve the quality.

The composition of Carbon Steel ASTM A105 Threaded Fittings does not change, but the grains are refined. It is resistant to high temperatures and impacts, but have poor corrosion resistance. You can choose galvanized Elbow to prolong the services life.

Class 3000 Threaded Fittings

3000LB threaded fittings are extensive used in heating, water and gas pipeline and dismantle demanded pipelines with low pressure. Their application are limited by following conditions:

1. The thread should be tapered. All fittings with internal and external threads shall be threaded with American National Standard Taper Pipe Threads (ASME B1.20.1). It is not recommended to use threaded fittings when the temperature is lower than -45℃ or higher than 200℃.

2. Toxic medium pipeline should be avoided.

3. Pipes with vibrations and excessive temperature changes should be avoided.

4. Compare with welded fittings, the seal of threaded fittings are less strong. That’s why it usually accompanied with sealant.

What is ASTM A105?

ASTM A105 is most commonly used carbon steel material grade that used to manufacture forged fittings of small diameter and forged steel flanges which below 24 inch. This carbon steel material grade is used for ambient- and higher-temperature service in pressure systems.

Tolerance for ASTM A105 Threaded Fittings

What is Female NPT?

NPT and BSP are the most common threads for threaded fittings. NPT female thread is an internal tapered threads with 60 degree angle. The thread taper is 1:16, size range is 1/16” to 12”.

According to the standard, all internal threads shall be countersunk a distance not less than one-half the pitch of the thread at an angle of approximately 45 deg with the axis of the thread. Countersinking shall be concentric with the threads. The length of threads shall be measured to include the countersink.

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Blind flange is a plate that attaches to a pipe end to block off pipeline and provides easy access for cleaning, inspection and modification. They have the same function with pipe plugs and caps, but it is detachable.

It is connected to a flange or flange fittings by bolting with a gasket between them to provide a seal. And should be placed where isolation is needed, such as the nozzle of a device, before or after a shut-off valve or between two flanges.

Gaskets have many types, such as Industrial Rubber Sheet, Asbestos Rubber Sheet, PTFE Gasket, Spiral Wound Gasket and so on. Its selection is influenced by many factors, but attention should be paid to the fluid type, temperature and pressure.

What is Raised Face?

Raised face is almost the most common sealing type among all kind of flanges and is easy to identify. This type flange has a higher gasket surface than bolting circle face. BLRF Flange can increase the pressure containment capability of the joint.

The height of raised face are fixed in most manufacture standards except ASME standard. In this standard, the raised face height will increase along with the pressure.

The flange pressure rating are: 150 LB, 300 LB , 600 LB , 900 LB , 1500 LB , and 2500 LB .

Blind Flange Specification

Material for Forged Steel Flange

We are specialized in various steel flanges, the materials including carbon steel, alloy steel and stainless steel.

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

Carbon steel refers to steel with carbon (C) as the main alloying element, with no or only a small amount of other alloying elements. Manufacturers most commonly use this type of metal material. They widely apply it in construction, machinery, pipelines, containers, automobiles, bridges, and other fields.

Alloy Steel: ASTM A182 F5 / F9 / F11 / F12 / F22 / F91 / F92

Alloys are made by combining two or more metal elements (or metal and non-metal elements) to enhance certain properties of metals, such as strength, corrosion resistance, high temperature resistance, oxidation resistance, etc. Engineers use these alloys extensively under harsh conditions such as high temperature, high pressure, strong corrosion and heavy load. Alloys are key materials in industries such as aerospace, chemical, power, shipbuilding and pressure vessel manufacturing.

Stainless Steel: A182 F304/304L/304H – F316/316L – F317 – F310S – F321 – F347 – F904L

Stainless steel is a high-alloy steel containing chromium (Cr) ≥ 10.5% and a low carbon content. As a result, it offers excellent corrosion resistance, mechanical properties, and formability. Due to these advantages, it is widely used in the chemical, food, medicine, machinery, energy, construction, and other industries.

Duplex Stainless Steel: A182 F51/53/55/60

Duplex Stainless Steel is a type of alloy steel that has the structural characteristics of both austenitic stainless steel and ferritic stainless steel. It has high strength and excellent corrosion resistance, especially strong resistance to chloride ion pitting and stress corrosion. It is widely used in marine engineering, petrochemical, papermaking, electric power, environmental protection, chemical equipment and other fields.

1500LB Raised Face Blind Flange Dimensions

• Standard: ASME B16.5.
• Length Unit: Inch.
• Weight Unit: KG

Blind Flange Inspection

2″ 1500LB Raised Face Blind Flange ASTM A105N

• Dimension of BLRF

Measure the values of flange Outside Diameter, Raised Face diameter, Thickness, Bolt Hole Numbers and Diameter, Bolt Circle Diameter and Weight. Guaranteed the values are within tolerance.

• Material Grades of Flanges

Detect the Chemical Composition and Mechanical Properties, and compared to ASTM A105 standard, ensure the material is qualified and its performance are not damaged.

• Surface of Blind Flanges

Visual check and hand touch, ensure they are smooth.

• Marking

Mark it as ” 2″1500# BLRF ASTM A105N ASME B16.5 16084″. The mark should be clear and correct.

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They include threaded fittings and socket weld fittings which use in pressure system at ambient and high temperature service. Their specifications cover in standard MSS, ASME and API.

ASTM A105 Threaded Fittings

Carbon Steel ASTM A105 threaded Forged Fittings are low Carbon, Manganese and Silicon added fittings which are usable for non-critical yet pressure applications, like refrigeration fittings, that work at constant temperatures. Only fully killed carbon steel material is used for forging. This material can be in shape of a bar or in shape of the ingot to meet various forging requirement. They offer maximum machinability and weldability.

Thread Types and Sizes

NPT, PT, BSPP and BSPT

Using Go/no go gauge to inspect the thread.

ASTM A105 Socket Weld Fittings

Carbon steel ASTM A105 socket weld forged fittings are usually “normalized” heat treatment, devoid of any internal stresses and thus having superior performances.

Why Use Socket Weld Fittings

Forged socket weld fittings have uniform grain structure which makes them suitable for pressure piping in the steam and power systems. And their welding procedures are complied with ASME Boiler and pressure vessel code section IX.

ASME B16.11 Dimensions of Forged Fittings

MSS SP 97 Forged Fittings Dimensions

MSS SP-97 forged fittings are integrally reinforced branch outlet fittings with socket weld end, threaded end and butt weld end. We use electro-polished to remove free iron in order to provide a high-quality finish to ensure them have the highest degree of corrosion resistance.

ASTM A105 Chemical Composition

ASTM A105 Mechanical Properties

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