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[China]
Trade Verify
Address: Suite 1004, Hongan Plaza, #258 Die Yuan Road, Yinzhou District, Ningbo City, China
Contact name:Richard SHEN
TORICH INTERNATIONAL LIMITED |
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Verified Suppliers
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Table 1 Outer Diameter,Wall Thicknes,Theoretical Weight and Test Pressure
| Norminal Outer Diameter(D)/mm | Norminal Wall Thickness(S)/mm | Theoretical Weight/(kg/m) | Test Pressure/MPa | ||
| Q235A,Q235B | Q295A,Q295B | Q345A,Q345B | |||
| 21.3 | 2.5 | 1.16 | 15 | 15 | 15 |
| 21.3 | 3 | 1.35 | 15 | 15 | 15 |
| 21.3 | 3.5 | 1.54 | 15 | 15 | 15 |
| 25 | 2.5 | 1.39 | 15 | 15 | 15 |
| 25 | 3 | 1.63 | 15 | 15 | 15 |
| 25 | 3.5 | 1.86 | 15 | 15 | 15 |
| 25 | 4 | 2.07 | 15 | 15 | 15 |
| 26.9 | 2.5 | 1.50 | 15 | 15 | 15 |
| 26.9 | 3 | 1.77 | 15 | 15 | 15 |
| 26.9 | 3.5 | 2.02 | 15 | 15 | 15 |
| 26.9 | 4 | 2.26 | 15 | 15 | 15 |
| 31.8 | 2.5 | 1.81 | 15 | 15 | 15 |
| 31.8 | 3 | 2.13 | 15 | 15 | 15 |
| 31.8 | 3.5 | 2.44 | 15 | 15 | 15 |
| 31.8 | 4 | 2.74 | 15 | 15 | 15 |
| 33.7 | 2.5 | 1.92 | 15 | 15 | 15 |
| 33.7 | 3 | 2.27 | 15 | 15 | 15 |
| 33.7 | 3.5 | 2.61 | 15 | 15 | 15 |
| 33.7 | 4 | 2.93 | 15 | 15 | 15 |
| 38 | 2.5 | 2.19 | 15 | 15 | 15 |
| 38 | 3 | 2.59 | 15 | 15 | 15 |
| 38 | 3.5 | 2.98 | 15 | 15 | 15 |
| 38 | 4 | 3.35 | 15 | 15 | 15 |
| 40 | 2.5 | 2.31 | 15 | 15 | 15 |
| 40 | 3 | 2.74 | 15 | 15 | 15 |
| 40 | 3.5 | 3.15 | 15 | 15 | 15 |
| 40 | 4 | 3.55 | 15 | 15 | 15 |
| 42.4 | 2.5 | 2.46 | 15 | 15 | 15 |
| 42.4 | 3 | 2.91 | 15 | 15 | 15 |
| 42.4 | 3.5 | 3.36 | 15 | 15 | 15 |
| 42.4 | 4 | 3.79 | 15 | 15 | 15 |
| 48.3 | 2.5 | 2.82 | 14.6 | 15 | 15 |
| 48.3 | 3 | 3.35 | 15 | 15 | 15 |
| 48.3 | 3.5 | 3.87 | 15 | 15 | 15 |
| 48.3 | 4 | 4.37 | 15 | 15 | 15 |
| 51 | 2.5 | 2.99 | 13.8 | 15 | 15 |
TABLE 2 Allowable deviation of outer diameter and wall thickness
| Nominal outside diameter D | Allowable deviation of outer diameter | Permissible deviation of wall thickness |
| D≤48.3 | ±0.50 | ±10%S |
| 48.3＜D≤273 | ±1%D | |
| D≤273 | ±0.75%D |
TABLE 3 Mechanical Property
| Grade | Tensile strength N/m | Lower yield strength N/m | Elongation A% Not less than | |
| D≤168.3 | D＞168.3 | |||
| Q235A,Q235B | 375 | 235 | 15 | 20 |
| Q295A,Q295B | 390 | 295 | 13 | 18 |
| Q345A,Q345B | 470 | 345 | 13 | 18 |
| Note : Tensile test arbitration time is based on longitudinal sample. | ||||
TABLE 4 Inspection items, test methods and sampling number of steel pipes
| NO | Inspection project | Sampling method and test method | Sampling quantity |
| 1 | chemical composition | GB/T 20066,GB/T 223,GB/T 4336 | One each furnace(canister) |
| 2 | Tensile test | GB/T 228,GB/T 2975 | One each batch |
| 3 | Tensile test | GB/T 241 | One by one |
| 4 | Ultrasonic examination | GB/T18256 | One by one |
| 5 | Eddy current flaw detection | GB/T 7735 | One by one |
| 6 | Bending test | GB/T 244 | Two per batch |
| 7 | Flattening test | GB/T 246 | Four each roll |
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