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Made of carbon steel, low alloy steel or alloy, this kind of tube satisfies the standards such as GB5310,GB6479,GB9948 and some relevant foreign standards ,and are mainly used in the fields of pressure vessel, chemistry, oil industry ,machine , ect.
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Size:OD 16-76mm, WT 1-14mm。
Common grades: 20G、12CrMoG、15MoG、20MnG、15CrMoG、12CrIMoVG、10Cr9MoIVNb、1Gr5Mo、10MoWVNb、GB5310
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Tolerance( mm ) |
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Size (mm)
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Common grade |
High grade |
Diameter OD
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≤30
30-50
>50 |
±0.20
±0.30
±0.8% |
±0.15
±0.25
±0.6% |
Thickness WT
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2-3
>3
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±12%-10%
±10% |
±10%
±7.5% |
The implementation of standards：
| GB 5310 |
High pressure boiler seamless steel tube |
| GB 3087 |
Seamless steel tube for low and medium
pressure boiler |
| GB 9948 |
Seamless steel tube for petroleum cracking |
| GB 6479 |
High-pressure seamless steel tube for chemical
fertilizer equipments |
| ASTM A 192 |
Medium-carbbon seamless steel boiler &
supperheater tube |
| ASTM A 210 |
Seamless carbon steel tube for high pressure boiler |
| ASTM A 213 |
Seamless ferritic and austenitic alloy steel tube
for boiler,superheater and heat-exchanger |
| JIS G 3456 |
Carbon seamless steel tube for high -pressure |
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