|
Natural gas spiral steel pipe , HSAW pipe , spiral welded tube , Large diameter spiral steel pipe ,thick-walled SSAW tube
Natural gas Spiral steel pipe is a strip coil as raw material, often temperature extrusion molding, automatic double wire double-sided submerged arc welding process welded seam steel pipe.
Natural gas spiral steel pipe specifications:
Diameter: 219mm ~ 1820mm
Wall thickness: 5mm ~ 26mm
HSAW pipe standard
API5L PSL1, PSL2
Natural gas spiral steel pipe material
Q235A, Q235B, 10 #, 20 #, Q345 (16Mn),
L415 (X60), L450 (X60), L485 (X70), L555 (X60), L405 (X60)
(X60N / M), L360NB / MB (X52N / M), L390NB / MB (X56N / M), L415NB / MB (X60N / M), L450MB (X65), L485MB (X70), L555MB (X80) The
Natural gas spiral steel pipe use
For oil, natural gas transportation.
Tolerance of Outside Diameter and Wall Thickness Of Spiral welded tube
|
Standard |
Tolerance of Pipe Body |
Tolerance of Pipe End |
Large diameter thick-walled spiral steel pipe Tolerance of Wall Thickness | |||
|
Out Diameter |
Tolerance |
Out Diameter |
Tolerance | |||
|
GB/T3091 |
OD≤48.3mm |
≤±0.5 |
OD≤48.3mm |
- |
≤±10% | |
|
48.3<od≤273.1mm |
≤±1.0% |
48.3<od≤273.1mm< span="" style="padding: 0px; margin: 0px;"> |
| |||
|
273.1<od≤508mm |
≤±0.75% |
273.1<od≤508mm< span="" style="padding: 0px; margin: 0px;"> |
-0.8～+2.4 | |||
|
OD>508mm |
≤±1.0% |
OD>508mm |
-0.8～+3.2 | |||
|
GB/T9711.1 |
OD≤48.3mm |
-0.79～+0.41 |
- |
- |
OD≤73 |
-12.5%～+20% |
|
60.3<od≤457mm |
≤±0.75% |
OD≤273.1mm |
-0.4～+1.59 |
88.9≤OD≤457 |
-12.5%～+15% | |
|
508<od≤941mm |
≤±1.0% |
OD≥323.9 |
-0.79～+2.38 |
OD≥508 |
-10.0%～+17.5% | |
|
OD>941mm |
≤±1.0% |
- |
- |
- |
- | |
|
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% | |
|
SY/T5037 |
OD<508mm |
≤±0.75% |
OD<508mm |
≤±0.75% |
OD<508mm |
≤±12.5% |
|
OD≥508mm |
≤±1.00% |
OD≥508mm |
≤±0.50% |
OD≥508mm |
≤±10.0% | |
|
API 5L PSL1/PSL2 |
OD<60.3 |
-0.8mm～+0.4mm |
OD≤168.3 |
-0.4mm～+1.6mm |
WT≤5.0 |
≤±0.5 |
|
60.3≤OD≤168.3 |
≤±0.75% |
168.3<od≤610 |
≤±1.6mm |
5.0<wt<15.0 |
≤±0.1T | |
|
168.3<od≤610 |
≤±0.75% |
610<od≤1422 |
≤±1.6mm |
T≥15.0 |
≤±1.5 | |
|
610<od≤1422 |
≤±4.0mm |
OD>1422 |
- |
- |
- | |
|
OD>1422 |
- |
- |
- |
- |
- | |
|
API 5CT |
OD<114.3 |
≤±0.79mm |
OD<114.3 |
≤±0.79mm |
≤-12.5% | |
|
OD≥114.3 |
-0.5%～1.0% |
OD≥114.3 |
-0.5%～1.0% |
≤-12.5% | ||
|
ASTM A53 |
≤±1.0% |
≤±1.0% |
≤-12.5% | |||
|
ASTM A252 |
≤±1.0% |
≤±1.0% |
≤-12.5% | |||
Production Process of spiral welded tube
(1) raw materials that are with coil, welding wire, flux. In the investment before going through rigorous physical and chemical testing.
(2) with steel head and tail docking, the use of single or double wire submerged arc welding, rolled into steel pipe after the use of automatic submerged arc welding.
(3) before forming, the strip through the leveling, cutting edge, planing edge, surface cleaning and delivery to the edge of the treatment.Natural gas spiral steel pipe
(4) the use of electrical contact pressure gauge on both sides of the conveyor to control the pressure of the cylinder to ensure the smooth delivery of the strip.
(5) the use of external control or internal control roll forming.thick-walled SSAW tube
(6) the use of weld gap control device to ensure that the weld gap to meet the welding requirements, diameter, misalignment and weld gap are strictly controlled.
(7) welding and external welding are used in the United States Lincoln welding machine for single or double wire submerged arc welding, in order to obtain a stable welding quality.
(8) Welded welds are subjected to continuous ultrasonic automatic wounds inspection, to ensure that 100% of the spiral weld nondestructive testing coverage. If there is a defect, automatic alarm and spray marking, production workers at any time to adjust the process parameters, the timely elimination of defects.Large diameter spiral steel pipe
(9) using the air plasma cutting machine to cut the steel pipe into a single.
(10) cut into a single steel pipe, each batch of steel pipe must be a strict first inspection system, check the weld mechanical properties, chemical composition, melting conditions, steel pipe surface quality and after nondestructive testing to ensure that the pipe process qualified Before they can be put into production.
(11) Where there is a continuous acoustic flaw mark on the weld, after manual ultrasonic and X-ray review, if there is a defect, after repair, again after the non-destructive testing, until the defect has been identified. spiral welded tube
(12) The butt welds of the strip and the pipe of the dies which intersect with the spiral weld are all inspected by X-ray or film.
(13) each pipe through the hydrostatic test, the pressure using radial seal. The test pressure and time are strictly controlled by the steel pipe hydraulic microcomputer detection device. Test parameters are automatically printed. HSAW pipe
(14) pipe end machining, so that the vertical face, bevel angle and blunt edge to be accurately controlled. Natural gas spiral steel pipe