ASTM A135 Grade B
ASTM A135 Grade B
The ASTM A135 Grade B steel pipe is an ERW pipe with ASTM specifications that are meant for transporting gas, vapor, water, or other liquids and may also be bent and flanged. It is composed of high-quality iron steel and is developed with a sturdy frame and high strength to ensure that it can function steadily and with excellent results. It is also light in weight, making it easy to transport at a minimal cost.
ASTM A135 Grade B steel pipe is designed with a circular pipe, which is efficient and can deliver more liquids, greatly improving working efficiency and is ideal for fire protection sprinkler pipe systems. It is also environmentally friendly, containing no toxic ingredients and so safeguarding the environment. It is tough and wear-resistant, allowing it to be used again. It is also waterproof, anti-corrosion, and oxygen resistant, allowing it to retain its original appearance even after extended usage.
PRODUCT FEATURES
Chemical Composition of ASTM A135 Grade B
Element | Carbon | Manganese | Phosphorus | Sulfur |
Grade B | 0.30 | 1.2 | 0.035 | 0.035 |
Mechanical Properties of ASTM A135 Grade B
ITEM | Grade B |
Tensile strength, min, ksi (MPa) | 60 (414) |
Yield strength, min, ksi (MPa) | 35 (241) |
Elongation in 2 in. (50 mm), min, % | |
For pipe having a specified wall thickness of5 ⁄16in. (7.9 mm) or more, if tested using a longitudinal strip test specimen | 30 |
For pipe having a specified wall thickness of less than5 ⁄16 in. (7.9 mm), if tested using a longitudinal strip test specimen | B |
For pipe of any size, if tested using a full-size longitudinal test specimen | 30 |
Tolerance of ASTM A135 Grade B Pipe
Thickness: the minimum wall thickness at any point shall be more than 12.5%under specified wall thickness.
Diameter: the outside diameter shall not vary more than ±1%from the nominal size specified.
Weight: the weight of the pipe shall not be more than ±10%of the specified weight.
Specifications of ASTM A135 Grade B
Outside Diameter | Wall Thickness | Weight Of Black Pipes | Test Pressure | ||||||||
Nominal Pipe Size | Standard | Standard | Plain End Pipes | ||||||||
INCH | MM | INCH | MM | INCH | MM | KG/MTR | MTR/TON | LB/FT | FT/TON | PSI | KPA |
3/4 | 20 | 1.050 | 26.7 | 0.083* | 2.11 | 1.28 | 781 | 0.86 | 2562 | 700 | 4830 |
1 | 25 | 1.315 | 33.4 | 0.109* | 2.77 | 2.09 | 478 | 1.41 | 1568 | 700 | 4830 |
1.1/4 | 32 | 1.660 | 42.2 | 0.109* | 2.77 | 2.69 | 372 | 1.81 | 1221 | 1000 | 6890 |
1.1/2 | 40 | 1.900 | 48.30 | 0.109* | 2.77 | 3.11 | 322 | 2.09 | 1056 | 1000 | 6890 |
2 | 50 | 2.375 | 60.3 | 0.109* | 2.77 | 3.93 | 254 | 2.64 | 833 | 1000 | 6890 |
2.1/2 | 65 | 2.875 | 73.0 | 0.120* | 3.05 | 5.26 | 190 | 3.53 | 623 | 1000 | 6890 |
3 | 80 | 3.500 | 88.9 | 0.120* | 3.05 | 6.46 | 155 | 4.34 | 509 | 1000 | 6890 |
3.1/2 | 90 | 4.000 | 101.6 | 0.120* | 3.05 | 7.41 | 135 | 4.98 | 443 | 1200 | 8270 |
4 | 100 | 4.500 | 114.3 | 0.120* | 3.05 | 8.37 | 119 | 5.62 | 390 | 1200 | 8270 |
5 | 125 | 5.563 | 141.3 | 0.134* | 3.40 | 11.58 | 86 | 7.78 | 283 | 1200 | 8270 |
6 | 150 | 6.625 | 168.3 | 0.134* | 3.40 | 13.85 | 72 | 9.30 | 237 | 1000 | 6890 |
8 | 200 | 8.625 | 219.1 | 0.188** | 4.78 | 25.26 | 40 | 16.96 | 130 | 800 | 5520 |
Manufacture & Heat Treatment of ASTM A135 Grade B
The steel must be produced using either the basic oxygen or electric furnace procedures. The steel can be cast as ingots or as strands. ASTM A135 Grade B ERW steel pipes, either Grade A or Grade B, are often manufactured in the modern industry using a high-frequency electric-resistance welding technique. The pipe should be made from flat-rolled steel (plate) in individual or continuous lengths by electric-resistance or electric-induction welding, with no extraneous material added. To put it simply, no filler metal is necessary. After welding, the weld seam of ASTM A135 Grade B ERW pipe should be heat treated to a minimum temperature of 1000°F [540°C] or processed in such a way that no untempered martensite remains.
Surface Appearance & End Preparation of ASTM A135 Grade B
ASTM A135 Grade B ERW steel pipes must be fairly straight and defect-free. Surface flaws of more than 12.5 percent of the nominal wall thickness must be avoided. The pipes might have a plain end, a beveled end, or a threaded end. ERW pipes supplied to SCH 10, in particular, should have a plain end only. All cutting burrs, both inside and outside, must be removed. Each length of threaded pipe must have one coupling for connecting purposes.
