GB/T 14291 Q235A Q235B TORICH ERW Welding Steel Tubing OD 4-1200mm
Product Details
welded steel pipe
,welding steel tubing
GB/T 14291 TORICH Welded steel tubes for mine liquid service
GB/T 14291 TORICH Welded steel tubes for mine liquid service
Size Range:
OD:4-1200mm
WT:0.3-200mm
Length: 4000mm-12000mm
Characteristic:
Good OD and ID tolerance controlled to Technical Standard
Stable quality
TABLE 2 Allowable deviation of outer diameter and wall thickness
Unit: millimeter
| 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 |
What is your Guarantee?
1.SO9001:2008 and TS16949 certification, SGS, BV, TUV or other third party inspection is available.
2.High quality with competitive price.
3.Advanced technology, experienced engineer, ISO quality system for quality assurance and traceability.
Do you have agent or distributor in our country?
1.We are recruiting area agent and distributor all over the world, welcome to send us your mail or call us for detail discussion.
How is your production capability?
1.2000 tons monthly production capacity, 5000 tons monthly trading capability
GB/T 14291 TORICH Welded steel tubes for mine liquid service
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