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GB/T18984 09DG Low Temperature Seamless Steel Pipe
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Steel Pipe
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GB/T18984 09DG Low Temperature Seamless Steel Pipe
Standard:GB/T18984-2003
GB/T18984 09DG steel pipe applies to -45 ° C grade low temperature pressure vessel pipelines and seamless steel tubes for low temperature heat exchanger pipelines
GB/T18984 09DG low temperature seamless steel pipe Quick Details
Company Name: Beite steel pipe
Country/Region: China
Material：09DG
FOB Price: US $1000-2000 / Ton | 1 Ton/Tons (Min. Order)
Port of Shipment：Tianjin,China
Payment：L/C or T/T
Delivery: 7-15 days after payment
Package：Standard export package,suit for all kinds of transport, or as required
GB/T18984 09DG seamless steel pipe Dimensional Range & Specification
Outside Diameter：12.7mm——219mm
Wall thickness：3.5mm——12.7mm
Length：6000mm、12000m or specified length as required.
Production method
Steel should be smelted in an oxygen converter or an electric furnace and refined outside the furnace. According to the requirements of the purchaser, it is negotiated between the supplier and the buyer and indicated in the contract. It can also be manufactured by other methods.
Steel pipes shall be manufactured by hot rolling (expansion) or cold drawing (rolling).
Delivery status
The steel pipe is delivered in a normalized state. When the finish rolling temperature is not lower than the phase transition critical temperature (Ar3), it can be regarded as normalizing treatment.
Chemical properties of GB/T18984 09DG Seamless Steel Pipe
| Standard | Grade | C | Si | Mn | P(max) | S | Ni | Mo | V |
| GB/T18984 | 09DG | <=0.12 | 0.17-0.37 | <=0.95 | 0.025 | 0.025 | - | - | <=0.07 |
Longitudinal Mechanical Properties of GB/T18984 09DG seamless steel pipe
Standard |
Grade |
Tensile strength | Lower yield strength（Rcl/Mpa） | Elongation | |
| Rm/Mpa | W.T.<=16mm | W.T.>16mm | A/% | ||
| GB/T18984 | 09DG | >=385 | >=210 | >=35 | |
Minimum impact test temperature of GB/T18984 09DG seamless steel pipe
|
Grade |
Minimum impact test temperature |
|
|
℉ |
℃ | |
|
09DG |
-- |
-4 |
Tolerances of outer diameter (D) and wall thickness (S) of steel pipe
| Process | Size(mm) | Tolerance | |
| Hot-rolled | O.D. | <351 | +/-1.0% D(+/-0.50min) |
| >=351 | +/-1.25% D | ||
| W.T. | <=25 | +/-12.5% S(+/-0.40 min) | |
| Cold drawn | O.D. | <=30 | +/-0.20 |
| 30-50 | +/-0.30 | ||
| >50 | +/-0.75% D | ||
| W.T. | <=3 | +12.5% S, -10% S | |
| >3 | +/-10% S | ||
Note: Outside diameter greater than or equal to 351 thermal Flaring wall thickness allowable deviation: Guests 15 write S
Performance Testing:
Hydraulic test
Flattening test
Bending test
Flaring test
Low-order tissue test
Non-metallic inclusion inspection
Nondestructive testing
Factory Photo
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