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ASTM A234 WP11 pipe fittings are a type of pipe fitting that is seamless, welded or fabricated. The ASTM A234 specification ranges from ½ inches to 24 inches.
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Alloy steel WP11 Buttweld fittings Specifications and sizes
| Specifications | ASTM A234/ ASME SA234 |
|---|---|
| Dimension | ASME/ ANSI B16.9 | ASME B16.28 | MSS-SP-43 | BS1560 | BS4504 | BS10 |
| Types | Seamless | Welded | Fabricated |
| Thickness of Fitting | SCH 10, SCH20, SCH 30, STD SCH 40, SCH 60, XS, SCH80, SCH100, SCH 120, SCH 140, SCH160, XXS available with NACE MR 01-75 |
| Size Range | ½” NB to 24″ NB in Sch 10s, 40s, 80s, 160s, XXS. (DN6~DN100) |
| Bending Radius | R= 1D, 8D, 3D, 2D, 6D, 5D, 10D |
| Process of Manufacturing | Push, Press, Cast, Forge. |
| Size Ranges | Seamless ButtWeld Fitting: From 1/2″ – 10″ Welded ButtWeld Fitting: From 1/2″ – 48″ |
These fittings are made of alloy steel wp11 buttweld fittings, which are easy to weld. They are also stronger. These fittings can be used in different applications, including services that operate at moderate to high temperatures. There are different types and classes of these fittings, depending on how they are put together.
Welding to WP11 fittings to the pipe means that it is permanently leak proof, due to continuous metal structure between pipe and fitting adds strength to the system.
Chemical Composition of Alloy Steel A234 WP11
| Grade | C | Mn | Si | S | P | Cr | Mo |
| A234 WP11 | 0.08-0.12 | 0.3-0.6 | 0.2-0.5 | ≤0.02 | ≤0.015 | 8-9.5 | 0.85-1.05 |
SA234 WP11 Mechanical Behaviour
| Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation % |
| A234 WP11 | ≥590 | ≥415 | ≥20 |
Heat Treatment
ASTM A234 (ASME SA234) pipe fittings after shaping from an elevated temperature, shall be cooled down to a temperature below critical range under suitable conditions which preventing injurious defects caused by too rapid cooling, but in no case more rapidly than the cooling rate in still air. Referring standard in Section 7 of ASTM A960/A960M.
