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ASTM A234 is the representative material standard for alloy steel butt weld pipe fittings, the dimensions range are very extensive that from 1/2“ to 60". We design and manufacture in accordance with ASME B16.9.
Buttweld fittings are including 90 degree elbow and bend, 45 degree elbow and bend, 180 degree elbow and bend, ASTM A234 equal and reducing tee, WP91 concentric and eccentric reducer, WP22 stub end. All of them are widely used in oil&gas, chemical industry, power plant, metal industry and oil tank.
Stainless Steel | ASTM A403 WP304/304L/304H, WP316/316L, WP310, WP317, WP321 |
Duplex Steel | ASTM A815 UNS S 31803, S 32205, S 32550, S 32750, S 32760 |
Alloy Steel | ASTM A234 WP1, WP5, WP9, WP11, WP12, WP22, WP91 |
Carbon Steel | ASTM A234 WPB, A860 WPHY42, 52, 60, 65, 70 |
According to below chart, we can know if the dimensions of buttweld fittings are correct.
Marking and Packing
Inspection
Chemical Composition
Grade | C | Mn | P | S | Si | Cr | Mo |
WP5 | 0.15 Max | 0.6 | 0.03 | 0.04 | 0.5-1.0 | 4-6 | 0.44-0.65 |
WP11 | 0.05-0.2 | 0.3-0.8 | 0.03 | 0.03 | 0.5 Max | 1-1.5 | 0.44-0.65 |
WP22 | 0.05-015 | 0.3-0.6 | 0.04 | 0.04 | 0.5 Max | 2-2.5 | 0.87-1.13 |
WP91 | 0.08-0.12 | 0.3-0.6 | 0.015 | 0.02 | 0.5-1.0 | 8-9.5 | 0.85-1.05 |
Mechanical Properties
Grade | Tensile Strength | Yield Strength | Elongation |
WP5 | 415 - 585 (Mpa) | 205 (Mpa) | 20 (%) |
WP11 | 415 - 585 (Mpa) | 205 (Mpa) | 20 (%) |
WP22 | 415 - 585 (Mpa) | 205 (Mpa) | 20 (%) |
WP91 | 590 (Mpa) | 415 (Mpa) | 20 (%) |