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Brand Name : TORICH
Model Number : GB/T 24591
Certification : ISO8001 ISO14001 TS16949
Place of Origin : Zhejiang/China
MOQ : 1 Ton
Price : Negotiable
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
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.
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GB/T 24591 Seamless Steel Tubes For High Pressure Feedwater Heater Images |