TORICH INTERNATIONAL LIMITED
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram |
| Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products |
| Packaging Details | In bundles or in wooden boxes. |
| Technique | Cold Drawn,ERW,Hot Rolled,Cold Rolled |
| Application | Low-Temperature-Service |
| Standard | ASTM,GB,DIN,API,BS |
| Alloy or not | Non-alloy,Is Alloy |
| Thickness | 2 - 120 mm |
| Section shape | rectangular/ square/ round |
| Surface treatment | customerized |
| Grade | 16MnDG; 10MnDG; 09DG; 09Mn2VDG |
| Grade group | 10#-45#,16Mn |
| Special pipe | precision seamless steel tube |
| Secondary or not | Non-secondary |
| Outer diameter(round) | 20 - 480 mm |
| Length | 1-12m/as customers' requests |
| Shape | Round Shape,Round/Square/Rectangular |
| Brand Name | TORICH |
| Model Number | GB/T 18984 |
| Certification | ISO9001, ISO14001, TS16949 |
| Place of Origin | Zhejiang/China |
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Product Specification
| Payment Terms | L/C, D/A, D/P, T/T, Western Union, MoneyGram | Supply Ability | 60000 Ton/Tons per Year |
| Delivery Time | 20-30days upon products | Packaging Details | In bundles or in wooden boxes. |
| Technique | Cold Drawn,ERW,Hot Rolled,Cold Rolled | Application | Low-Temperature-Service |
| Standard | ASTM,GB,DIN,API,BS | Alloy or not | Non-alloy,Is Alloy |
| Thickness | 2 - 120 mm | Section shape | rectangular/ square/ round |
| Surface treatment | customerized | Grade | 16MnDG; 10MnDG; 09DG; 09Mn2VDG |
| Grade group | 10#-45#,16Mn | Special pipe | precision seamless steel tube |
| Secondary or not | Non-secondary | Outer diameter(round) | 20 - 480 mm |
| Length | 1-12m/as customers' requests | Shape | Round Shape,Round/Square/Rectangular |
| Brand Name | TORICH | Model Number | GB/T 18984 |
| Certification | ISO9001, ISO14001, TS16949 | Place of Origin | Zhejiang/China |
GB/T 18984 seamless steel tubes are designed for low-temperature pressure vessel piping and low-temperature heat exchanger piping, covering service temperature grades from -45°C to -196°C. They are manufactured by hot-finished or cold-finished seamless processes, with controlled heat treatment and low-temperature impact toughness verification to reduce brittle-fracture risk in cryogenic and refrigerated piping systems.
| Item | Description |
|---|---|
| Material | Carbon steel / low-alloy low-temperature steel |
| Standard | GB/T 18984 |
| Main Grades | 16MnDG, 10MnDG, 09DG, 09Mn2VDG, 06Ni3MoDG |
| Outside Diameter | Common range: 6–630 mm; customized sizes available according to project drawings |
| Wall Thickness | According to GB/T 17395 or customer-specified schedule/thickness |
| Length | 1–12 m, customized; common fixed lengths include 5.8 m, 6 m, 11.8 m, 12 m |
| Tolerance Range | According to GB/T 17395 or agreed purchase specification |
| Straightness | Controlled for pressure piping fabrication; project-specific tolerance available |
| Surface Condition | Bare, oiled, anti-rust coated, black painted, or customized |
| Heat Treatment | Normalized, normalized + tempered, or other controlled heat treatment depending on grade and order requirement |
| Manufacturing Method | Hot-finished or cold-finished seamless tube |
| Inspection | Chemical analysis, tensile test, impact test, flattening/flaring/bending test, hydrostatic or NDT, dimensional and surface inspection |
| Feature | Technical Value |
|---|---|
| Low-temperature service range | Applicable to -45°C to -196°C low-temperature piping and heat exchanger service under GB/T 18984 |
| Impact-toughness grade selection | 16MnDG / 10MnDG / 09DG for -45°C; 09Mn2VDG for -70°C; 06Ni3MoDG for -100°C typical low-temperature impact applications |
| Strength range | 16MnDG tensile strength 490–665 MPa; 09Mn2VDG tensile strength ≥450 MPa; 06Ni3MoDG tensile strength ≥455 MPa |
| Seamless structure | No longitudinal weld seam, reducing weld-related discontinuity risk in pressure piping |
| Nickel/Mo alloy option | 06Ni3MoDG contains Ni and Mo for improved low-temperature toughness compared with plain carbon-manganese grades |
| Controlled documentation | Test reports can include heat number, chemical composition, mechanical properties, heat treatment condition, impact test temperature, NDT/hydrostatic test results |
| Buyer Concern | Our Solution |
|---|---|
| Impact toughness must match the design minimum temperature. For low-temperature systems, a Charpy impact test at the wrong temperature is not equivalent to the project design condition. | We confirm the required design temperature before production and match the grade accordingly: 16MnDG/10MnDG/09DG for -45°C class, 09Mn2VDG for -70°C class, and 06Ni3MoDG for deeper low-temperature service. Impact test temperature and values can be shown on the MTC. |
| Heat treatment condition affects low-temperature toughness. Incorrect or missing heat treatment records are a common rejection point in pressure-pipe procurement. | We supply tubes in normalized or controlled heat-treated condition as required by grade and order. Heat treatment batch, furnace record, and mechanical test results can be matched to heat number for traceability. |
| Traceability and inspection documents are critical for pressure equipment projects. EN 10204 3.1/3.2 documentation is often requested for international procurement. | We provide heat-number traceability, chemical and mechanical test data, dimensional inspection, surface inspection, and NDT/hydrostatic test records. EN 10204 3.1 or third-party inspection can be arranged when specified in the purchase order. |
| Standard System | Relevant Standard | Brief Description |
|---|---|---|
| GB | GB/T 18984 | Seamless steel tubes for low-temperature-service piping |
| ASTM / ASME | ASTM A333 / ASME SA333 | Seamless and welded carbon/alloy steel pipe for low-temperature service |
| ASTM | ASTM A334 | Seamless and welded carbon/alloy steel tubes for low-temperature service |
| EN | EN 10216-4 | Seamless steel tubes for pressure purposes with specified low-temperature properties |
| JIS | JIS G3460 | Steel tubes for low-temperature service |
| JIS | JIS G3464 | Steel heat exchanger tubes for low-temperature service |
| ISO | ISO 9329-3 | Seamless steel tubes for pressure purposes, low-temperature-related application reference |
Cryogenic liquid nitrogen vaporizer piping — GB/T 18984 seamless steel tubes can be used for low-temperature piping sections in liquid nitrogen vaporizer systems where impact toughness, pressure resistance, and stable performance under sub-zero operating conditions are required.
| Grade | C % | Si % | Mn % | P max % | S max % | Ni % | Mo % | V % |
|---|---|---|---|---|---|---|---|---|
| 16MnDG | 0.12–0.20 | 0.20–0.55 | 1.20–1.60 | 0.025 | 0.025 | — | — | — |
| 10MnDG | ≤0.13 | 0.17–0.37 | ≤1.35 | 0.025 | 0.025 | — | — | ≤0.07 |
| 09DG | ≤0.12 | 0.17–0.37 | ≤0.95 | 0.025 | 0.025 | — | — | ≤0.07 |
| 09Mn2VDG | ≤0.12 | 0.17–0.37 | ≤1.85 | 0.025 | 0.025 | — | — | ≤0.12 |
| 06Ni3MoDG | ≤0.08 | 0.17–0.37 | ≤0.85 | 0.025 | 0.025 | 2.50–3.50* | 0.20–0.35* | ≤0.05 |
| Grade | Tensile Strength Rm MPa | Yield Strength MPa | Elongation A % | Typical Impact Temperature |
|---|---|---|---|---|
| 16MnDG | 490–665 | ≥325 for S ≤16 mm; ≥315 for S >16 mm | ≥30 | -45°C |
| 10MnDG | ≥400 | ≥240 | ≥35 | -45°C |
| 09DG | ≥385 | ≥210 | ≥35 | -45°C |
| 09Mn2VDG | ≥450 | ≥300 | ≥30 | -70°C |
| 06Ni3MoDG | ≥455 | ≥250 | ≥30 | -100°C |
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company,Seller
Year Established:
1997
Total Annual:
10million-15million
Employee Number:
100~150
Ecer Certification：
Verified Supplier
Who We are ？ TORICH is an enterprise that has been producing precision steel pipes and steel pipe processing for over 20 years, with a factory area of approximately 20000 square meters The main products produced are carbon steel and alloy steel grade seamless steel pipes, we... Who We are ？ TORICH is an enterprise that has been producing precision steel pipes and steel pipe processing for over 20 years, with a factory area of approximately 20000 square meters The main products produced are carbon steel and alloy steel grade seamless steel pipes, we...
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