TORICH INTERNATIONAL LIMITED
TORICH INTERNATIONAL LIMITED The Steel Tube Maker
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ORICH ASTM A334 Seamless Carbon Steel Tubes For Low Temperature Service
| Standard: | ASTM A334, GB/T 18984, JIS G3460, JIS G 3464 | Shape: | Round Shape |
|---|---|---|---|
| Production Process: | Cold Roll, Cold Drawn, Hot Roll, Thermal Expansion | OD: | 3.2-500mm |
| WT: | 0.5-30mm | Usage: | Low Temperature Pressure Vessel Pipe And Heat Exchanger Pipe |
Standard: ASTM A334, GB/T 18984, JIS G3460, JIS G 3464
Classification and code
The seamless steel tubes produced by this standard are divided into two types according to the processing methods of the products.
Hot rolled (expanded) steel tube WH
Cold drawn (rolled) steel pipe WC
Delivery state: Delivery of steel tubes in a normalizing state.
usage: This standard is applicable to low temperature pressure vessel pipe and heat exchanger pipe.
Characteristic: TEST:
Good concentricity Tension Test
Good surface quality Flattening Test
Good OD and ID tolerance Flare Test
High Precision Hardess Test
Stable quality Impact test
Smooth Roughness
TORICH QUALITY ASSURANCE
Steel grade and chemical composition
| Steel grade | Chemical composition/% | ||||||||
| C | Si | Mn | P | S | Ni | Mo | Co | Cu | |
| Grade 1 | ≤0.30 | — | 0.40-1.06 | ≤0.025 | ≤0.025 | — | — | — | — |
| Grade 3 | ≤0.19 | 0.18~0.37 | 0.31-0.64 | ≤0.025 | ≤0.025 | 3.18-3.82 | — | — | — |
| Grade 6 | ≤0.30 | 0.10min | 0.29-1.06 | ≤0.025 | ≤0.025 | — | — | — | — |
| Grade 7 | ≤0.19 | 0.13~0.32 | ≤0.90 | ≤0.025 | ≤0.025 | 2.03-2.57 | — | — | — |
| Grade 8 | ≤0.13 | 0.13~0.32 | ≤0.90 | ≤0.025 | ≤0.025 | 8.40-9.60 | — | — | — |
| Grade 9 | ≤0.20 | — | 0.40-1.06 | ≤0.025 | ≤0.025 | 1.60-2.24 | — | — | 0.75-1.25 |
| Grade 11 | ≤0.10 | ≤0.35 | ≤0.60 | ≤0.025 | ≤0.025 | 35.0-37.0 | ≤0.50 | ≤0.50 | — |
This tube is used for high pressure boilers. The seamless high pressure boiler tube is produced with the method of Hot Rolling(Extrusion), Cold Drawn or Cold Rolled, according to the Chinese standard GB 5310-1995.
GB5310-1995, one kind of seamless steel tubes, mainly used to manufacture high pressure steam boiler and above pipelines with high-quality carbon steel, alloy steel and heat-resistant seamless stainless steel tubes.
Feature of seamless high pressure boiler tube: Persistent high strength, high oxidation resistance, good organizational stability
Application of the seamless boiler tube: For high pressure boilers.
Produce method for high pressure boiler tube: Hot rolling(extrusion), cold drawn, cold rolled.
The seamless carbon high pressure boiler tubes material:
10#/20#/Q345/20G/15MnG/20MnG/15MoG/20MoG/16Mn/15CrMo/15CrMoG/12Cr1MoV/12Cr1MoVG/Cr5Mo/10CrMo910 and so on.
The boiler tubes often work in high temperature and high pressure, pipe in high temperature smoke and steam will meet oxidation and corrosion, thus it requires a durable steel Persistent high strength, high oxidation resistance, good organizational stability.
Seamless high-pressure boiler pipe: for the manufacture of a variety of high pressure boiler superheated steam pipes, boiling water pipe, water wall tubes and superheated steam locomotive boiler tubes, small pipe and brick arch tubes. (Dial) seamless steel pipe with high quality carbon structural steel hot or cold. 20# steel is mainly used, in addition to chemical composition and mechanical properties will do hydrostatic testing, curling, flaring, flattening and other tests. State of delivery hot rolled, cold-rolled (dial) to heat treatment delivery.
