GB/T9711.2 LSAW Pipe
This standard specifies the non-alloy steel and alloy steel (excluding stainless steel) seamless steel pipe and welded steel pipe delivery technical conditions.
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This standard includes quality and test requirements that are generally higher than those of GB/T 9711.1. This standard is generally applicable to steel pipes for the transportation of combustible fluids does not apply to cast pipes.
|
Production |
Welded Steel Pipe |
|
Brand |
GNEE |
|
Standard |
API 5L, API 5CT, SY/T5037, SY/T5040, GB/T9711.1,GB/T9711.2, A, B, X42-X80, L175-L555,L245NB, etc. |
|
Material |
1.0033,08F,A53,A106,Q235,Q345b, |
|
Out Diameter |
159mm-3200mm |
|
Wall Thickness |
3mm-30mm |
|
Length |
5.8m-11.8m,or as customer's requirements. |
|
Place of Origin |
Henan, China |
|
Main Market |
Middle East,Africa,South-east Asia,USA,Canada,South America |
|
Technique |
SAW, ERW welyading etc. |
|
Usage |
1. Piling project 2. Heat-supply project 3. Conveying drinking water,drainage,coal gas,fuel gas,mine slurry and other low & middle pressure fluids 4. API5L Petroleum and natural gas pipeline 5. Chemistry industry 6.Electric power engineering circulating pipe |
|
Package |
1.Bundle packing or in bulk
2. Bevelled or plain ends as per buyer's request 3. Marks: as per customer's request 4. Surface treatment: with or without varnish/2PP/2PE/3PE/3PP/FBE coating 5. Metal or plastic protecting caps at pipe ends |
|
Delivery Time |
about 20days after receipt of irrevocable L/C at sight or 30% deposit T/T |
|
Other products |
1.Spiral welded steel pipe
2.LSAW steel pipe 3.ERW steel pipe 4. Casing pipe |
|
External Coating |
FBE, 2PE, 3PE,3PP etc. |
|
Pipe end |
Plain end, beveled end, PVC covered and both ends capped ,threaded and coupled |
GB/T9711.2 Welded Steel Pipe Tolerance of Outside Diameter and Wall Thickness
| GB/T9711.2 | 60<od≤610mm | ±0.75%D～±3mm | 60<od≤610mm | ±0.5%D～±1.6mm | 4mm<wt<25mm | ±12.5%T～±15.0%T |
| 610<od≤1430mm | ±0.5%D～±4mm | 610<od≤1430mm | ±0.5%D～±1.6mm | WT≥25mm | -3.00mm～+3.75mm | |
| OD>1430mm | - | OD>1430mm | - | - | -10.0%～+17.5% |
The tolerances on dimensions are established in accordance with EN 10219-1&2
| Characteristics | Tolerances | ||||
| Outside dimensions of side | (H,B 100mm) |
 1% with a min of 0.5mm |
|||
| H : Longest side B : Shortest side |
(100mm H,B200mm) |
0.8% |
|||
| (200mmH,B) |
0.6% |
||||
| Wall thickness(T) | (T5mm) |
10% |
|||
| (5mmT) |
0.50mm |
||||
| Concavity / Convexity | MAX 0.8% with a min of 0.5mm | ||||
| Squareness of sides | 90 1 |
||||
| External corner radius | (T6mm) |
1.6TR2.4T |
|||
| (6mmT10mm) |
2.0TR3.0T |
||||
| (10mmT) |
2.4TR3.6T |
||||
| Twist | 2mm + 0.5mm/m in length | ||||
| Straightness | 0.15% in total length | ||||
| Mass | 6% in individual lengths |
||||
| Length | Approximate | 0, +50mm | |||
| Exact | L6,000mm |
0, +5mm | |||
| 6,000mmL10,000mm |
0, +15mm | ||||
| 10,000mmL |
0, +5mm+1mm/m | ||||
GNEE GB/T9711.2 LSAW Steel Pipe
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