ASME B16.5 Standard

ASME B16.5 is one of the most widely recognized and applied international standards for pipe flanges and flanged fittings. It specifies dimensions, tolerances, pressure-temperature ratings, materials, marking, and testing requirements for flanges used in piping systems. This standard is accepted globally in industries such as oil and gas, petrochemical, chemical processing, power generation, water treatment, and general industrial applications. It ensures interchangeability, safety, and performance for flanged connections under different pressure and temperature conditions.

Flange Types in ASME B16.5 Standard

The ASME B16.5 standard covers a complete range of flange types to meet different structural and functional needs. Common types include:

• Weld Neck Flange
• Slip-On Flange
• Socket Weld Flange
• Blind Flange
• Lap Joint Flange
• Threaded Flange

Each flange design is suitable for specific working conditions, pressure levels, and installation methods. Among all these types, the Slip-On Flange remains one of the most popular choices due to its simple structure and convenient installation.

ASME B16.5 Slip On Flange

ASME B16.5 Slip On Flange is a lightweight and economical flange style designed to slide over the outer diameter of the pipe. It is then welded on both the inside and outside to ensure strength and tightness. Compared with Weld Neck Flanges, Slip-On Flanges are easier to align and install, which helps save labor time and cost. They are widely used in low-pressure and medium-pressure piping systems where high structural strength is not the primary requirement.

Specifications of ASME B16.5 Slip On Flange

ASME B16.5 Slip On Flanges follow strict specifications to ensure stable performance and interchangeability.

Key specifications include:

Sealing Faces of Slip On Flange

The sealing face is one of the most important parts of a Slip On Flange, as it directly affects sealing performance and leakage prevention. Under ASME B16.5, Slip On Flanges are available with three main sealing face types:

Raised Face (RF)

Raised Face is the most commonly used sealing face for Slip On Flanges. It features a small raised surface that concentrates pressure on the gasket, improving sealing efficiency. It is compatible with many types of gaskets and suitable for most general industrial applications.

Flat Face (FF)

Flat Face has a full flat sealing surface without any raised section. It is mainly used in low-pressure systems and often matched with cast iron valves or equipment to prevent cracking or damage during assembly.

Ring Type Joint (RTJ)

Ring Type Joint provides metal-to-metal sealing and is used in high-pressure and high-temperature environments. It is typically applied in heavy industries such as oil refineries, offshore drilling, and high-temperature power systems.

To know more about flange sealing faces, please click.

How to Use Slip On Flange

Correct installation ensures the performance and service life of ASME B16.5 Slip On Flanges.

1. Slide the Slip On Flange over the end of the pipe until it reaches the proper position.
2. Adjust the flange to ensure good alignment with the matching flange or valve.
3. Perform inner fillet welding to fix the flange and prevent media leakage.
4. Apply outer fillet welding to improve structural strength.
5. Place a suitable gasket between the two sealing faces.
6. Tighten the bolts and nuts evenly to complete the connection.

Where to Apply Slip On Flange

ASME B16.5 Slip On Flanges are widely used in many industries due to their cost-effectiveness and ease of installation.

Typical applications include:

• Oil and gas gathering and transportation pipelines
• Chemical processing and refining plants
• Water supply and wastewater treatment systems
• Power generation facilities
• HVAC and general industrial piping
• Low and medium pressure utility lines

They perform reliably in non-critical and moderately critical piping systems.

Carbon Steel Slip On Flange Weight Reference

Weight is an important factor for transportation, structural design, logistics, and cost estimation. Below is a reference weight chart for carbon steel ASME B16.5 Slip On Flanges:

Conclusion

ASME B16.5 Slip On Flange is a practical, economical, and widely used flange type in industrial piping systems. Understanding its standard specifications, sealing face types, installation method, and application scope helps users make the right selection. The weight chart provides valuable data for project planning, logistics, and structural evaluation. For most low and medium pressure applications, Slip On Flanges remain a top choice for engineers and purchasers worldwide.

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Hastelloy C276 is an alloy that stands out due to its unique combination of elements: its main components are nickel, molybdenum, and chromium, with trace amounts of iron, tungsten, cobalt, and other elements. This combination of elements gives Hastelloy C276 exceptional properties, which are extended to the flanges made from it. The two most commonly used thread standards globally are BSP and NPT threads. Although their purposes are similar, they have different characteristics and applications.

Specifications of Hastelloy C276 Flanges

Hastelloy C276 Flange Standards

Material Standards: ASTM B564 (forged flanges), UNS N10276, Werkstoff Nr. 2.4819, etc.

Dimension Standards:

ASME B16.5 (for pipe flanges and flange fittings from NPS 1/2“ to NPS 24”)

ASME B16.47 (for large-diameter steel flanges from NPS 26“ to NPS 60”)

EN 1092 (European flange standard)

DIN (German standard)

JIS (Japanese standard)

Common Types of Hastelloy C276 Flanges

Chemical Composition of ASME SB 564 N10276 Flanges

· High nickel (Ni) content: Ensures the stability of the alloy in reducing media, forming the foundation for corrosion resistance;

· Chromium (Cr): Provides oxidation resistance and corrosion resistance in oxidizing media (such as nitric acid);

· Molybdenum (Mo) + Tungsten (W): Significantly enhances resistance to localized corrosion (pitting corrosion, crevice corrosion), especially in chloride-containing environments;

· Low carbon (C): Prevents the formation of carbides between carbon and chromium, thereby preventing intergranular corrosion.

ASTM B564 Hastelloy C276 Mechanical Properties

Equivalent Grades of Hastelloy C276 Flanges

Key Features

✅ Exceptional corrosion resistance: exhibits outstanding resistance to strong oxidizing and reducing media such as hydrochloric acid, sulfuric acid, chlorides, and chlorine gas.

✅ Superior mechanical properties: maintains stable strength and toughness even under high-temperature, high-pressure conditions or in strongly acidic environments.

✅ Strong resistance to localized corrosion: Effectively resists pitting corrosion, crevice corrosion, and intergranular corrosion.

✅ Good weldability: Easy to process and weld, with no reduction in corrosion resistance in the welded area.

✅ High-temperature performance: Hastelloy C276 exhibits excellent stability, particularly maintaining strength and structural integrity at high temperatures around 700°C.

Hastelloy C276 Flanges Dimension

Application Scenarios

Hastelloy C276 flanges, renowned for their exceptional corrosion resistance, are primarily used in extreme environments where conventional materials cannot withstand the conditions. Typical applications include:

Chemical and Petrochemical Industries

Environmental Protection Industry

Pharmaceutical and Food Industries

Marine Engineering

Nuclear Industry

Installation and Maintenance Guidelines

Avoid contact between dissimilar metals: When in contact with metals of lower potential, such as carbon steel, galvanic corrosion may occur. Insulating gaskets (e.g., PTFE) or coatings should be used to isolate the metals;

Gaskets selection: Prioritize gaskets with matching corrosion resistance, such as PTFE or metal-backed gaskets, to prevent gasket material corrosion by the medium and subsequent leakage;

Cleaning and Pre-Treatment: Before installation, remove oil stains and oxide scale from the flange surface using a stainless steel wire brush or specialized cleaner to prevent impurities from affecting sealing performance;

Torque Control: Apply tightening torque according to flange specifications and pressure ratings in accordance with standards to avoid over-tightening, which can cause flange deformation or bolt breakage.

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）

Hastelloy C276 Flanges Exported Countries

We Export  Hastelloy C276 Flanges 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 Hastelloy C276 Flanges appeared first on Quality Manufacturer of Industrial Pipe Fittings.

As the Spring Festival is approaching, most factories in China have entered holiday mode, and logistics and transportation are also facing challenges. After much coordination, we successfully produced and shipped these products within 7 days.

After receiving the goods, he expressed high appreciation for our quick response and efficient logistics, said he would continue to cooperate in the future, and planned to expand the scale of purchases in the new year.

The inspection photos are as follows：

ASTM A105 Slip on Flanges Specification 

ASTM A105 Slip On Flange (SO flange) is a carbon steel Slip On Flange manufactured according to ASTM A105 standard and suitable for high temperature and high pressure pipeline systems. Its installation method is to put the flange directly on the pipe and then fix it with fillet welding. It is usually used in low pressure and non-critical applications.

ASTM A105 is the standard specification for carbon steel forging and is used in different piping applications. The ASTM A105 Carbon Steel Slip on Flanges is used in various fittings and valves with high-temperature services in a pressure system. 

A105 Flange Welding

These components can be welded. Welding procedures must comply with ASME Boiler and Pressure Vessel Code Section IX.

A105 Flange Heat Treatment

Heat treatment is not a mandatory requirement except for flanges above Class 300, flanges of special design where the design pressure or design temperature are not known and for items over 4” NPS and above Class 300. When heat treatment is required, annealing, normalizing, normalize and temper, normalize and quench and tempering shall be the applied methods.

A105 Flange Forging

This alloy is forged at between 1,700 degrees Fahrenheit and 2,200 degrees Fahrenheit, followed by quenching and tempering.

A105 Flange Annealing

Forged parts are allowed to cool to below 1,000 degrees Fahrenheit before reheating to between 1,550 degrees Fahrenheit and 1,700 degrees Fahrenheit. Slow furnace cooling follows.

ASTM A105 Slip On Flanges Chemical Compostion

ASTM A105 Slip On Flanges Mechanical Properties

Slip-on Flange Dimensions

Class 150 lb Slip-on Flange Dimensions & Weight

Advantages

Cost-Effectiveness: 

Slip on flanges are generally less expensive than weld neck flanges.2 This makes them a budget-friendly option for many projects.

Ease of Installation:

Their design allows them to “slip” onto the pipe, simplifying the alignment process.3 This reduces installation time and labor costs.

Simplified Alignment:

The ease of alignment during installation is a significant advantage, particularly in field installations where precision can be challenging.

Versatility:

ASTM A105 carbon steel is a versatile material suitable for a wide range of applications, especially those involving moderate-pressure and high-temperature conditions.4

Availability:

These types of flanges are widely available from many different suppliers.

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