Product Introduction:
Seamless steel pipes are used for manufacturing steam boilers, pipelines for high temperature, high pressure and above, furnace pipes for petrochemical industry, heat exchanger pipes and pressure pipelines, high-pressure fertilizer equipment and pipelines, and seamless steel pipes for other chemical equipment.
Standard:
Chinese National Standard: GB5310-2017
American Society of Mechanical Engineers standards: ASME SA-106、ASME SA -192、MASME SA -209M、ASME SA-210M ASME SA -213M、ASME SA -335M
German Industrial Standard: DIN17175
Japanese Industrial Standard: JIS G3462
Usage:
Used for the manufacturing of boiler water-cooled walls, economizers, reheaters, superheaters, and steam pipelines
Dimensional Deviation
Deviation of wall thickness and outer diameter of steel pipes supplied according to GB5310 standard
Technical parameters:
Types of steel pipes | Steel pipe size mm | Allowable deviation |
Common | senior |
hot-rolled pipe | outside diameterD | ≤159 | ±1.0%(Minimum value is ± 0.5mm) | ±0.75%(Minimum value is ± 0.3mm) |
＞159 | ±1.0% | ± 0.90% |
wall thicknessS | ＜3.5 | +15%（最小值为+0.48mm-10%-0.32mm ） | ±10%（最小值为±0.2mm） |
3.5~20 | +15%-10% | ±10% |
＞20 | D＜219 | ±10% | ±7.5% |
D≥219 | +12.5%-10.0% | ±10% |
cold-drawn pipe | outside diameterD | ≤30 | ±0.20mm | ±0.15mm |
＞30~50 | ±0.30mm | ±0.25mm |
＞50 | ±0.8% | ±0.6% |
wall thicknessS | 2~3 | +12%-10% | ±10% |
＞3 | ±10% | ±7.5% |
Deviation of wall thickness and outer diameter of steel pipes supplied according to GB5310 standard
Types of steel pipes | Steel pipe size mm | Allowable deviation |
Common | senior |
hot-rolled pipe | outside diameterD | ≤159 | ± 1.0% (minimum ± 0.50mm) | ± 0.75% (minimum ± 0.40mm) |
＞159 | ±1.0% | ±0.90% |
wall thicknesss | ≤20 | +15.0% (minimum+0.45mm) -12.5% -0.35mm | ± 10% (minimum ± 0.30mm) |
＞20 | ±12.5% | ±10% |
cold-drawn pipe | outside diameterD | 10~30 | ±0.40mm | ±0.20mm |
＞30~50 | ±0.45mm | ±0.25mm |
＞50 | +1.0% | ±0.75% |
wall thickness s | 1.5~3.0 | +15%－10% | ±10% |
＞3.0 | +12.5%－10% | ±10% |
Deviation in wall thickness and outer diameter of steel pipes supplied according to other standards
project | standard | range | Allowable deviation |
outside diameter | DIN17175 | heat pipe | D ≤ 100mm | ± 0.75% (minimum value ± 0.5mm) |
D ＞ 100~ 320mm | ± 0.9% |
cooling tube：D ≤ 120mm | ± 0.6% (minimum value ± 0.25mm) |
ASME SA -192M、ASME SA -209M、ASME SA -210M、 ASME SA -213M 、 ASME SA -335M 、 JIS G 3461 | heat pipe | D ＜ 100mm | +0.4~ -0.8mm |
D ≥ 100~ ＜ 160mm | +0.4~ -1.2mm |
D ≥ 160~ ＜ 200mm | +0.4~ -1.8mm |
D ≥ 200 mm | +0.4~ -2.4mm |
cooling tube | D ＜ 25mm | ± 0.10 mm |
D ≥ 25~ ＜ 40mm | ± 0.15 mm |
D ≥ 40~ ＜ 50mm | ± 0.20 mm |
D ≥ 50~ ＜ 60mm | ± 0.25 mm |
D ≥ 60 ~ ＜ 80mm | ± 0.30 mm |
ASME SA-106 | D 10.3~ 48.3mm | ± 0.40 mm |
D ＞ 48.3~ 114.3mm | ± 0.79 mm |
D ＞ 114.3~ 219.1mm | +1.59~ -0.79mm |
D ＞ 219.1~ 457mm | +2.38~ -0.79mm |
wall thickness | DIN17175 | D ≤ 130mm | S ≤ 2Sn | +15%~-10% |
S ＞ 2Sn~4Sn | +12.5%~-10% |
S ＞ 4Sn | ± 9% |
130 ＜ D ≤ 320mm | S ≤ 0.05D | +17.5%~-12.5% |
0.05D ＜ S ≤ 0.11D | ± 12.5% |
S ＞ 0.11D | ± 10% |
ASME SA -192M 、 ASME SA -209M 、 ASME SA -210M 、 ASME SA -213M 、 ASME SA -335M 、 JIS G 3461 | heat pipe | S ≥ 2~ ＜ 2.4mm ，且 D ＜ 100 | +40~0% |
S ≥ 2.4~ ＜ 3.8mm | +35~0% |
S ≥ 3.8~ ＜ 4.6mm | +33~0% |
S ≥ 4.6mm | +28~0% |
cooling tube | D ＜ 40 | S ＜ 2mm | +0.4~ 0mm |
S ≥ 2mm | +20~0% |
D ≥ 40 | +22~0% |
ASME SA-106 |
| -12.5% |
Note: Sn is the standard wall thickness
