Application of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe for Mechanical Processing
API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe can be used for conveying air steam, sewage, gas and water. It can also be used for mechanical processing, engineering purpose.Details of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe for Mechanical Processing
Manufacture:Seamless process ,cold drawn or hot rolled Size : O.D.: 20~500mm W.T.: 3~80mm Length: 6M or specified length as required. Ends: Plain End, Beveled End, ThreadedManufacturing Process of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe for Mechanical Processing
API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe are made either by cold-drawn or hot rolled, as required by the customers.Chemical Composition of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe
Grade and Chemical Composition (％) For API 5L PSL2| Standard |
Grade | Chemical composition(%) | |||
| C | Mn | P | S | ||
| API 5L | B | ≤0.24 | ≤1.20 | ≤0.025 | ≤0.015 |
Mechanical Properties of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe
| Standard |
Grade | Chemical composition(%) | |||
| C | Mn | P | S | ||
| API 5L | X42 | ≤0.22 | ≤1.30 | ≤0.025 | ≤0.015 |
Tolerance for Diameter at Pipe Ends
| Size | Tolerance (with respect to specified outside diameter) |
| <2 3/8 | + 0.016 in., - 0.031 in. (+ 0.41 mm, - 0.79 mm) |
| > 2 3/8 and ≤4 1/2, continuous welded | ±1.00% |
| > 2 3/8 and < 20 | ±0.75% |
| > 20. seamless | ± 1.00% |
| >20 and <36, welded | + 0.75%.-0.25% |
| > 36、welded | + 1/4 in.. - 1/8 in. (+ 6.35 mm, -3.20 mm) |
ln the case of pipe hydro-statically tested to pressures in excess of standard test pressures, other tolerances may be agreed upon between the manufacturer and the purchaser.
Tolerance for Diameter at Pipe Ends
| Size | Minus Tolerance | Plus Tolerance | End-to-End Tolerance | Out-of-Roundness | |
| Diameter,Axis Tolerance (Percent of Specified OD) | Maximum Differential Between Minimum and Maximum Diameters (Applies Only to Pipe With D/t≤ 75) | ||||
| ≤10 3/4 l&V4 | 1/64(0.40mm) | 1/16(1.59mm) mm) | — | — | |
| >10 3/4 and ≤20 | 1/32 (0.79 mm) | 3/32 (2.38 mm) | — | — | — |
| > 20 and≤ 42 | 1/32 (0.79 mm) | 3/32(2.38 mm) | b | ± 1% | <0.500 in. (12,7 mm) |
| >42 | 1/32 (0.79 mm) | 3/32 (2.38 mm) | b | ± 1% | £ Q625 in. (15.9 mm) |
Out-of-roundness tolerances apply to maximum and minimum diameters as measured with a bar gauge, caliper, or device measuring actual maximum and minimum diameters.
The average diameter (as measured with a diameter tape) of one end of pipe shall not differ by more than 3/32 in. (2.38 mm) from that of the other end.
Tolerance for Weight
| Quantity | Tolerance (percent) |
| Single lengths, special plain-end pipe or A25 pipeSingle lengths, other pipeCarloads.GradeA25,40,000lb(18 144kg)or moreCarloads, other than Grade A25,40.0001b (18 144 kg) or more Carloads, all grades less than 40000 lb (18 144 kg) Order items. Grade A25. 40.000 lb (18 144 kg) or more Order items, other than Grade A25,40,000 lb (18 144 kg) or more Order items, all grades, less than 40.000 lb (18 144 kg) | + 10.-5.0 + 10,- 35 -2.5 -1.75 -15 -3.5 -1.75
-3.5 |
Notes:
1. Weight tolerances apply to the calculated weights for threaded-and-coupled pipe and to the tabulated or calculated weights for plain-end pipe. Where negative wall thickness tolerances smaller than those listed in above table are specified by the purchaser, the plus weight tolerance for single lengths shall be increased to 22.5 percent less the wail thickness negative tolerance.
2. For carloads composed of pipe from more than one order item, the carload tolerances are to be applied on an individual order item basis.
3. The tolerance for order items apply to the overall quantity of pipe shipped for the order item.
Mechanical Properties
Mechanical Properties of API 5L GR.B Heavy Wall Thickness Seamless Steel Pipe (PSL1)：| Yield Strength(MPa) | Tensile Strength(MPa) | Elongation A% | ||
| psi | MPa | psi | MPa | Elongation (Min ) |
| 35,000 | 241 | 60,000 | 414 | 21~27 |
| Yield Strength(MPa) | Tensile Strength(MPa) | Elongation A% | Impact (J) | ||
| psi | MPa | psi | MPa | Elongation (Min ) | Min |
| 241 | 448 | 414 | 758 | 21~27 | 41(27) |
Tolerances for Wall Thickness
| Size | Type of Pipe | Tblerancr1 (Percent of Specified Wall Thickness} | |
| Grade B or Lower | Grade X42 or Higher | ||
| <2 7/8 | All | +20.- 12.5 | + 15.0.-12.5 |
| >2 7/8and<20 | All | + 15,0,-12.5 | + 15-I2.5 |
| >20 | Welded | + 17.5.-12.5 | + 19.5.-8.0 |
| >20 | Seamless | + 15.0.-12.5 | + 17.5.-10,0 |
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