Introduction To ASME Standards

The ASME sets critical standards for various engineering disciplines, including flanges and pipe fittings. These standards are pivotal in ensuring safety, performance, and interoperability across industries like oil and gas, chemical processing, power generation, and manufacturing. This comprehensive introduction to ASME standards for flanges and pipe fittings, their significance, development processes, and their role in modern engineering.

Introduction To ASME Standards ASME Flange type

B16.10 Face To Face And End To End Dimensions Of Valves

This introduction to ASME standard covers the face-to-face and end-to-end dimensions for gate valves, as well as the center-to-face and center-to-end dimensions for angle valves. Its purpose is to ensure the installation interchangeability of valves with specified materials, types, sizes, rating classes, and end connections.

B16.11 Forged Fittings, Socket Welding And Threaded

This introduction to ASME standard covers the ratings, sizes, dimensional tolerances, identification, and material specifications for socket-welding and threaded forged fittings. These fittings are designated with ratings of 2000, 3000, and 6000 for threaded end fittings, and 3000, 6000, and 9000 for socket-welding end fittings.

Alloy-Steel-Socket-Weld-Fittings type

B16.21 Nonmetallic Flat Gaskets For Pipe Flanges

This introduction to ASME standard covers the types, dimensions, materials, sizes, dimensional tolerances, and markings for non-metallic flat gaskets. These gaskets are sized to match the flanges described in the reference flange standards.

B16.25 Buttwelding Ends

This standard covers the preparation of butt-welded ends of pipe components connected to piping systems through welding. It includes requirements for welding bevels, external and internal forming of thick-walled components, and end preparation (including dimensions and dimensional tolerances). The scope includes the preparation of the following joints: no gasket rings; cracked or discontinuous gasket rings; solid or continuous gasket rings; consumable insert rings; and root welds for Tungsten Inert Gas (GTAW) welding.

alloy steel-Stub-Ends type

B16.34 Valves Flanged, Threaded And Welding End

This standard applies to new constructions, including the pressure-temperature ratings, dimensions, dimensional tolerances, materials, nondestructive testing requirements, testing, and marking of cast, forged, and manufactured flanges, threaded and welded ends, as well as wafer or flange-less valves made from steel, nickel-based alloys, and other alloy.

Wafer or flange-less valves installed between flanges or directly against flanges (bolt or through-bolt types) are considered flange-end valves. Mandatory Appendix V provides alternative rules for valves of NPS 2.1/2 and smaller.

B16.36 Orifice Flanges

This standard applies to flanges with orifice plate pressure connections (similar to flanges in ASME B16.5). The scope is limited to the following: (a) Butt-welding flanges in classes 300, 400, 600, 900, 1500, and 2500; and (b) Class 300 slip-on and threaded flanges.

orifice flange type

B16.48 Line Blanks

This standard covers the pressure-temperature ratings, materials, dimensions, dimensional tolerances, marking, and testing of operation pipe blanks installed between ASME B16.5 flanges with pressure ratings of 150, 300, 600, 900, 1500, and 2500, with sizes ranging from NPS 1/2 to NPS 24.

B16.49 Factory-Made, Wrought Steel, Buttwelding Induction Bends For Transportation And Distribution Systems

This standard covers the design, materials, manufacturing, testing, marking, and inspection requirements for factory-manufactured carbon steel pipe elbows produced by induction bending processes with controlled chemical and mechanical properties, including both tangent and non-tangent types.

B16.5 Pipe Flanges And Flanged Fittings.. NPS 1/2 Through 24

This standard covers the pressure-temperature ratings, materials, dimensions, dimensional tolerances, marking, testing, and designation methods for pipe flanges and flange fittings. It includes flanges with pressure ratings of 150, 300, 400, 600, 900, 1500, and 2500, with sizes ranging from NPS 1/2 to NPS 24, and requires both metric and American standards.

The customary units for bolt and flange bolt hole diameters are inches; flanged fittings with ratings of 150 and 300, and sizes from NPS 1/2 to NPS 24, also require both metric and American standards. For flanged fittings with ratings of 400, 600, 900, 1500, and 2500, and sizes from NPS 1/2 to NPS 24, Appendix G provides approval using only American customary units.

This standard is limited to flanges and flange fittings made from cast or forged materials, as well as blind flanges and certain reducing flanges made from cast, forged, or plate materials. It also includes requirements and recommendations for flange bolts, flange gaskets, and flange joints.

B16.9 Factory-Made Wrought Buttwelding Fittings Of Introduction To ASME Standards

This standard covers the overall dimensions, dimensional tolerances, ratings, testing, and marking of factory-manufactured forged carbon steel and alloy steel butt-welding fittings with sizes ranging from NPS 1/2 to 48. It applies to fittings with any manufacturable wall thickness. This standard does not include low-pressure corrosion-resistant butt-welding fittings.

B1.20.1 Pipe Threads, General Purpose, Inch

This introduction to ASME standard covers the dimensions and measurements for general-purpose pipeline threads. B1.20.1 is a revision and redesign of ANSI B2.1-1968.

B1.20.2M Pipe Threads, 60 °. General Purpose (Metric)

ASME B1.20.2M-2006, “Pipe Threads, 60°, General Purpose (Metric),” represents a metric adaptation of the well-recognized ASME B1.20.1-1983, which covers general-purpose pipe threads (inch) for NPT tapered pipe threads. The ASME B1 Standards Committee developed this metric translation to encourage global use and acceptance of NPT pipe threads. For ease of use, this introduction to ASME standard includes product threads and gauges. The design of the threads and gauges remains unchanged.

B36.10M Welded And Seamless Wrought Steel Pipe

This introduction to ASME standard covers the standardization of sizes for welded and seamless forged steel pipes under high or low temperatures and pressures. The term “pipe” differs from “tubing” and applies to tubular products with sizes commonly used in piping and pipeline systems. For pipes with an NPS of 12 (DN 300) and below, the outside diameter is numerically greater than the corresponding size. In contrast, the outside diameter of tubing numerically matches the size designation for all dimensions.

B36.19M Stainless Steel pipe

This introduction to ASME standard covers the standardization of sizes for welded and seamless forged stainless steel pipes. The term “pipe” differs from “tubing” and applies to tubular products with sizes commonly used in piping and pipeline systems. For pipes sized 12 and smaller, the outside diameter is numerically larger than the corresponding size.

In contrast, the outside diameter of tubing numerically matches the size designation for all dimensions. The wall thicknesses for sizes 14 to 22, as well as sizes 10 and 12, differ from those in ANSI/ASME B36.10. ANSI/ASME B36.10 includes additional pipe thicknesses, which are also available in the market in stainless steel materials.

Stainless-Steel-Butt-Weld-Fitting type

Elite Piping Manufacture Co., Ltd. excels in delivering top-notch piping components that adhere to the rigorous requirements outlined in the introduction to ASME standards.

As a distinguished leader in the industry, Elite Piping ensures that all our products, including flanges, fittings, and pipes, are meticulously manufactured to comply with the introduction to ASME standards. This commitment to the introduction to ASME standards guarantees that our products meet the highest benchmarks for quality, safety, and performance.

By integrating the principles of the introduction to ASME standards into our manufacturing processes, Elite Piping provides reliable solutions that are essential for critical applications across various industries, including oil and gas, chemical processing, and power generation.

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