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Stainless steel pipe fittings

Stainless steel pipe fitting is part that connect pipe to pipe, its purpose to connect, control and change the direction, split, sealed, support various parts and components in pipeline system, selecting and preparing proper pipe fitting to joint together, there are various types, sizes, grades & specifications to meet specific requirement.

Pipe Fittings are sized to Nominal pipe size (NPS) respectively, NPS ranges from1/2 inch to 24 inch, thicknesses are marked in schedule no, ranging from SC 5 to 80S, sizes tolerances should be controled in compliance with standard specifications in both outside and inside.

1/2” to 24” seamless type SCH 5S to XXS
2” to 48” welded type SCH 5S to XXS

Pipe Fitting Joint method

  • Butt welded pipe fittings
  • Threaded fittings
  • Sleeve pipe fittings
  • Clamp pipe fittings
  • Socket pipe fitting

Manufacturing method and process

A buttweld fitting is manufactured by the process of hot or cold forming, which means that it is bended and moulded to the correct shape. They are also heat treated to remove residual stresses and to achieve specific mechanical properties.

The ends of buttweld fittings have to be bevelled and the exact shape of the bevel depends upon the wall thickness of the pipe it is being attached to. The material of a buttweld fitting can be any one of a number of exotic materials such as super duplex, nickel alloy or 6% Moly. The majority of the time, the material of the fitting is the same as the pipe system that it is welded to.

Application Of Stainless Steel Pipe/Buttweld Fittings Industries

Buttweld fittings can be used in a wide variety of industries to alter, divide or end the flow of fluids. These operations include the following: waste treatment facilities, chemical processing, breweries, petrochemical facilities, cryogenic plants, paper production, gas processing and even nuclear power plants. The wide range of applications demonstrates the robustness of a buttweld fitting and how much this particular type of fitting is relied upon.

Packing Of Stainless Steel Pipe Fittings Materials

Butt welded stainless steel pipe fittings is stainless steel tube and fittings of the rim on the seam lap argon welding fittings, which normally takes plus welding welding.

Stainless steel material traits:

The excellent raw material of BW pipe fittings are better performance in mechanical properties and beautiful surface.

Grade Carbon Silicon Manganese Chromium Nickel Molybdenum Sulfur Phosphorous
WP 304 0,08 1,0 2.00 18.0 – 20.0 8.0 – 11.0 0,03 0,045
WP 304L 0,035 1,0 2.00 18.0 – 20.0 8.0 – 13.0 0,03 0,045
WP 316 0,08 1,0 2.00 16.0 – 18.0 10.0 – 14.0 2.00 – 3.00 0,03 0,045
WP 316L 0,035 1,0 2.00 16.0 – 18.0 10.0 – 15.0 2.00 – 3.00 0,03 0,045
WP 321 0,08 1,0 2.00 17.0 – 19.0 9.0 – 12.0 0,03 0,045

304 and 316L are the most used stainless steel grades, they are both high chromium austenitic grades, and can be met the most cases, and other grades are available, such as, 321/321H and 347/347H. Some special alloys are usually for elbow as well, like 904L, 2205.

There are also EN steel no. for opting, these equivalents include 1.4301, 1.4307, 1.4401, 1.4404, 1.4541, 1.4550, 1.4438 and 1.4539.

Stainless steel pipe fittings grades include:

  • ASTM/ASME A403 WP 304-304L-304H-304LN-304N
  • WP 316-316L-316H-316LN-316N-316Ti
  • WP 321-321H
  • WP 347-347H
  • 2205 duplex material is available.

Pipe Fitting Standards

  • ASME/ANSI B16.9 – Factory-Made Wrought Steel Butt-welding Fittings
  • ASME/ANSI B16.11 – Forged Steel Fittings, Socket-Welding and Threaded
  • ASME/ANSI B16.28 – Wrought Steel Butt-welding Short Radius Elbows and Returns
  • ASME/ANSI B16.5 – Pipe Flanges and Flanged Fittings
  • ASTM A403 – Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings

We can also provide pacified stainless steel and coated line fittings, threaded, socket-weld & coupled ends.

No job is too small or too large. Whether it’s a small project, plant shut down, line replacement, or stock requirement for ongoing operations Petropipe can help you meet your deadline.