···ADDITIONAL INFORMATION
According to customer requirements, the production of national standard, American standard, German standard, Japanese standard, non-standard high, medium and low pressure various specifications of carbon steel, stainless steel, alloy steel flange, elbow, Bend, reducing pipe, tee, four, head, pipe cap and thread, socket series pipe components products.
ADDITIONAL INFORMATION
According to customer requirements, the production of national standard, American standard, German standard, Japanese standard, non-standard high, medium and low pressure various specifications of carbon steel, stainless steel, alloy steel flange, elbow, Bend, reducing pipe, tee, four, head, pipe cap and thread, socket series pipe components products.
Description
Standard:GB9948-1988
Application: For manufacturing of furnace tubes, heat exchangers and pipelines in refineries
Tolerance on Dimensions
| Pipe Types | Pipe Size (mm) | Tolerances | |
| Hot Rolled | OD | ≤159 | ±1.0% |
| >159 | ±1.20% | ||
| WT | ≤20 | ±12.5% | |
| >20 | ±10.0% | ||
| Cold Drawn | OD | ≤30 | ±0.20mm |
| 30-50 | ±0.30mm | ||
| >50 | ±0.8% | ||
| WT | ≤3 | +12% -10% | |
| >3 | ±10% | ||
Chemical composition and mechanical properties
| Grade | Chemical Composition | Mechanical Properties | |||||||||
| C | Mn | Si | Cr | Mo | Ni | S | P | Tensile Strength(Mpa) | Yield Strength(Mpa) | Elongation(%) | |
| 10 | 0.07-0.14 | 0.35-0.65 | 0.17-0.37 | ≤0.15 | – | ≤0.25 | ≤0.035 | ≤0.035 | 330-490 | ≥205 | ≥24 |
| 20 | 0.17-0.24 | 0.35-0.65 | 0.17-0.37 | ≤0.25 | – | ≤0.25 | ≤0.035 | ≤0.035 | 410-550 | ≥245 | ≥21 |
| 12CrMo | 0.08-0.15 | 0.40-0.70 | 0.17-0.37 | 0.40-0.70 | 0.40-0.55 | ≤0.30 | ≤0.035 | ≤0.035 | 410-560 | ≥205 | ≥21 |
| 15CrMo | 0.12-0.18 | 0.40-0.70 | 0.17-0.37 | 0.80-1.10 | 0.40-0.55 | ≤0.30 | ≤0.035 | ≤0.035 | 440-640 | ≥235 | ≥21 |
| 1Cr2Mo | ≤0.15 | 0.30-0.60 | 0.50-1.00 | 2.15-2.85 | 0.40-0.65 | – | ≤0.035 | ≤0.035 | ≥390 | ≥175 | ≥22 |
| 1Cr5Mo | ≤0.15 | ≤0.60 | ≤0.60 | 4.00-6.00 | 0.45-0.60 | ≤0.60 | ≤0.035 | ≤0.035 | ≥390 | ≥195 | ≥22 |
Packing and transportation:
Description
Standard:GB9948-1988
Application: For manufacturing of furnace tubes, heat exchangers and pipelines in refineries
Tolerance on Dimensions
| Pipe Types | Pipe Size (mm) | Tolerances | |
| Hot Rolled | OD | ≤159 | ±1.0% |
| >159 | ±1.20% | ||
| WT | ≤20 | ±12.5% | |
| >20 | ±10.0% | ||
| Cold Drawn | OD | ≤30 | ±0.20mm |
| 30-50 | ±0.30mm | ||
| >50 | ±0.8% | ||
| WT | ≤3 | +12% -10% | |
| >3 | ±10% | ||
Chemical composition and mechanical properties
| Grade | Chemical Composition | Mechanical Properties | |||||||||
| C | Mn | Si | Cr | Mo | Ni | S | P | Tensile Strength(Mpa) | Yield Strength(Mpa) | Elongation(%) | |
| 10 | 0.07-0.14 | 0.35-0.65 | 0.17-0.37 | ≤0.15 | – | ≤0.25 | ≤0.035 | ≤0.035 | 330-490 | ≥205 | ≥24 |
| 20 | 0.17-0.24 | 0.35-0.65 | 0.17-0.37 | ≤0.25 | – | ≤0.25 | ≤0.035 | ≤0.035 | 410-550 | ≥245 | ≥21 |
| 12CrMo | 0.08-0.15 | 0.40-0.70 | 0.17-0.37 | 0.40-0.70 | 0.40-0.55 | ≤0.30 | ≤0.035 | ≤0.035 | 410-560 | ≥205 | ≥21 |
| 15CrMo | 0.12-0.18 | 0.40-0.70 | 0.17-0.37 | 0.80-1.10 | 0.40-0.55 | ≤0.30 | ≤0.035 | ≤0.035 | 440-640 | ≥235 | ≥21 |
| 1Cr2Mo | ≤0.15 | 0.30-0.60 | 0.50-1.00 | 2.15-2.85 | 0.40-0.65 | – | ≤0.035 | ≤0.035 | ≥390 | ≥175 | ≥22 |
| 1Cr5Mo | ≤0.15 | ≤0.60 | ≤0.60 | 4.00-6.00 | 0.45-0.60 | ≤0.60 | ≤0.035 | ≤0.035 | ≥390 | ≥195 | ≥22 |
Packing and transportation:
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