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ASTM A53 specifies the requirements for seamless/welded black and hot-dip galvanized steel pipes for general use. The steel listed in the standard must be processed in an open-air furnace, alkaline oxygen or electric furnace, and must have the following chemical requirements: carbon, manganese, phosphorus, sulfur, copper, nickel, chromium, molybdenum and vanadium. The pipeline should be seamless or welded. Tensile, bending and flattening tests should be carried out to ensure that it must meet the standard mechanical properties. Hydrostatic pressure test shall be carried out, and no leakage through the weld or pipe body. Non-destructive electrical tests should be carried out to ensure that the total volume of the pipeline must meet the standard. If it is deemed necessary to ensure that the pipeline meets the specified requirements, the buyer has the right to carry out any inspections and tests specified in this specification.
ASTM A 53 is suitable for pressure piping systems, pipes for pipelines and general purpose pipes at a temperature of 350 degrees. Among them, Gr.B steel grade is the most commonly used, with its tensile strength ≥ 415 (MPa) and yield strength ≥ 240 (MPa).
It Is Mainly Used for force and pressure parts, and for general purpose steam, water, gas and air pipes.
GR.A, GR.B
|
Grade |
Component %，≤ | ||||||||
| C | Mn | P | S |
CuA |
NiA |
CrA |
MoA | VA | |
| S type（seamless pipe） | |||||||||
| GR.A | 0.25B | 0.95 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
| GR.B | 0.30C | 1.20 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
| E type（Resistance welded pipe） | |||||||||
| GR.A | 0.25B | 0.95 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
| GR.B | 0.30C | 1.20 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
| F type（Furnace Welded Pipe） | |||||||||
| A | 0.30B | 1.20 | 0.05 | 0.045 |
0.40 |
0.40 |
0.40 |
0.15 | 0.08 |
A The sum of these five elements must not be greater than 1.00%。
B For every 0.01% decrease in the maximum carbon content, the maximum manganese content is allowed to increase by 0.06%, but the maximum cannot exceed 1.35%.
C Each 0.01% decrease in the maximum carbon content will allow the maximum manganese content to increase by 0.06%, but the maximum must not exceed 1.65%.
| item | GR.A | GR.B |
|
tensile strength, ≥, psi [MPa] Yield Strength, ≥, psi [MPa] Gauge 2in.or 50mm elongation |
48 000 [330]30 000 [205]A,B | 60 000 [415]35 000 [240]A,B |
A The minimum elongation of gauge length 2in. (50mm) shall be determined by the following formula：
e=625000(1940)A0.2/U0.9
e = the minimum elongation of the gauge 2in. (50mm), the percentage rounded to the nearest 0.5%;
A = Calculated according to the specified outer diameter of the nominal tube or the nominal width of the tensile sample and its specified wall thickness, and rounded to the nearest cross-sectional area of the tensile sample of 0.01 in.2 (1 mm2), and It is compared with 0.75in.2 (500mm2), whichever is smaller.
U = specified minimum tensile strength, psi (MPa).
B For various combinations of different sizes of tensile test specimens and prescribed minimum tensile strength, the required minimum elongation is shown in Table X4.1 or Table X4.2, according to its applicability.
Tensile test, bending test, hydrostatic test, nondestructive electrical test of welds.
Supply Ability: 2000 Tons Per Month Per Grade Of ASTM A53/A53M-2012 Steel Pipe
In Bundles And In Strong Wooden Box
7-14 days if in stock, 30-45 days to produce
30% depsoit, 70% L/C or B/L copy or 100% L/C at sight