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 | 20-40days |
| Packaging Details | In bundles or in wooden boxes. |
| Application | Structure Pipe |
| Technique | Hot Rolled,Cold Drawn,Cold Rolled |
| Thickness | 0.6 - 100 mm |
| Standard | ASTM,DIN,JIS,GB,API |
| Alloy or not | Non-alloy |
| Section shape | Round |
| Standard2 | GB/T 24591 |
| Secondary or not | Non-secondary |
| Outer diameter(round) | 10.3 - 813 mm |
| Special pipe | boiler tubes |
| Grade | 20GJ (SA556B2, SA556C2, P235GH); 20MnGJ (SA556B2, SA556C2, P235GH |
| Material | carbon steel tube |
| Type | Seamless,Heat Exchanger Tube |
| Length | 6 meters or as customers request |
| Condition | New |
| Brand Name | TORICH |
| Model Number | GB/T 24591 |
| Certification | ISO8001 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 | 20-40days | Packaging Details | In bundles or in wooden boxes. |
| Application | Structure Pipe | Technique | Hot Rolled,Cold Drawn,Cold Rolled |
| Thickness | 0.6 - 100 mm | Standard | ASTM,DIN,JIS,GB,API |
| Alloy or not | Non-alloy | Section shape | Round |
| Standard2 | GB/T 24591 | Secondary or not | Non-secondary |
| Outer diameter(round) | 10.3 - 813 mm | Special pipe | boiler tubes |
| Grade | 20GJ (SA556B2, SA556C2, P235GH); 20MnGJ (SA556B2, SA556C2, P235GH | Material | carbon steel tube |
| Type | Seamless,Heat Exchanger Tube | Length | 6 meters or as customers request |
| Condition | New | Brand Name | TORICH |
| Model Number | GB/T 24591 | Certification | ISO8001 ISO14001 TS16949 |
| Place of Origin | Zhejiang/China |
High-pressure feedwater heaters are crucial components in power generation plants, enhancing the efficiency of the steam cycle. GB/T 24591 provides the standard for seamless steel tubes used specifically for these applications in China. This article explores the material properties, specifications, key features, chemical composition, mechanical properties, steel grades, application, and possible alternative grades specified under GB/T 24591.
Seamless steel tubes governed by the GB/T 24591 standard are typically made from carbon steel and alloy steel, designed to endure high pressure and temperature conditions characteristic of feedwater heaters. These materials ensure structural integrity and longevity in demanding environments.
Seamless steel tubes under the GB/T 24591 standard exhibit the following specifications:
The chemical composition of these steel tubes affects their mechanical properties and performance. Below is a table detailing the standard elements and their typical percentage ranges.
| Element | Typical Range (%) |
|---|---|
| Carbon (C) | 0.10 - 0.30 |
| Silicon (Si) | 0.10 - 0.50 |
| Manganese (Mn) | 0.30 - 1.00 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | 0.30 - 1.25 |
| Nickel (Ni) | 0.30 - 1.00 |
| Molybdenum (Mo) | 0.10 - 0.25 |
Mechanical properties dictate the performance of the tubes under stress. Below is a table summarizing the key mechanical properties.
| Property | Range |
|---|---|
| Tensile Strength | 415 - 880 MPa |
| Yield Strength | 205 - 295 MPa |
| Elongation (%) | ≥ 20% |
| Hardness | ≤ 85 HRB (Rockwell B Scale) |
GB/T 24591 includes several grades, each tailored to specific performance needs. Common grades used include:
These grades are selected based on the balance of toughness, strength, and temperature thresholds required for specific applications.
Seamless steel tubes outlined in GB/T 24591 are primarily used in high-pressure feedwater heaters to:
When GB/T 24591 grades are unavailable or unsuitable, the following alternative grades may be considered, subject to compatibility and regulatory approvals:
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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