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| Nguồn gốc: | Trung Quốc |
| Hàng hiệu: | ASME SA249 |
| Chứng nhận: | ISO 9001-2015,ABS, GL, DNV, NK, PED, AD2000, GOST9941-81, CCS |
| Số mô hình: | ASME SA249 TP304/304L |
| Số lượng đặt hàng tối thiểu: | 500kg |
|---|---|
| Giá bán: | 1-100000 USD |
| chi tiết đóng gói: | Vỏ ply-wooden với nắp/ bó nhựa |
| Thời gian giao hàng: | Theo số lượng |
| Điều khoản thanh toán: | L/C, T/T. |
| Khả năng cung cấp: | 1000 tấn/tháng |
| Tên sản phẩm: | ống hàn thép không gỉ | Tiêu chuẩn ống hàn: | ASME SA249 |
|---|---|---|---|
| Ống hàn sử dụng: | Tàu áp lực, nồi hơi, chất siêu nhiệt, bộ trao đổi nhiệt, bình ngưng, v.v. | Bưu kiện: | Vỏ gỗ nhựa / Túi dệt trong gói |
| Chiều dài: | Tối đa 34M/PC | Bề mặt: | Ủ sáng |
| Làm nổi bật: | ASME SA249 stainless steel welded tube,TP304/304L welded tube for shipbuilding,stainless steel boiler tube with warranty |
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1. Introduction to ASME SA249 Standard and Material Grades
The ASME SA249 standard, developed by the American Society of Mechanical Engineers (ASME), specifically covers the requirements for welded austenitic stainless steel tubes used in boilers, superheaters, heat exchangers, and condensers. This standard ensures that the tubes meet rigorous quality and performance requirements for critical high-temperature and pressure applications.
The TP304 and TP304L grades are among the most widely used austenitic stainless steels globally. While they share many characteristics, the key difference lies in their carbon content:
Dual-grade certification indicates that the material meets the chemical and mechanical properties requirements of both grades, offering enhanced flexibility for various applications.
2. ASME SA249 TP304/304L Stainless Steel Welded Tube Chemical Composition Requirements
The chemical composition of ASME SA249 TP304/304L welded tubes must conform to the following specifications:
| Element | TP304 Requirements | TP304L Requirements | Dual Certification Implications |
| Carbon (C) | ≤0.08% | ≤0.03% | Must meet the stricter ≤0.03% limit |
| Manganese (Mn) | ≤2.0% | ≤2.0% | Must meet ≤2.0% |
| Silicon (Si) | ≤1.00% | ≤1.00% | Must meet ≤1.00% |
| Phosphorus (P) | ≤0.045% | ≤0.045% | Must meet ≤0.045% |
| Sulfur (S) | ≤0.030% | ≤0.030% | Must meet ≤0.030% |
| Chromium (Cr) | 18.00-20.00% | 18.00-20.00% | Must meet 18.00-20.00% |
| Nickel (Ni) | 8.00-11.00% | 8.00-12.00% | Typically adjusted to 8.00-12.00 |
3. SA249 TP304/304L Welded Tube Mechanical Properties and Performance Characteristics
| Property | TP304 Requirements | TP304L Requirements | Notes |
| Tensile Strength | ≥515 MPa | ≥485 MPa | TP304L typically has slightly lower strength |
| Yield Strength | ≥205 MPa | ≥170 MPa | TP304L has lower yield strength |
| Elongation | ≥35% | ≥35% | Both maintain excellent ductility |
| Hardness (HRC) | <90 | <90 | Similar hardness characteristics |
4. SA249 TP304/304L Welded Tube Heat Treatment and Quality Assurance
All tubes undergo solution annealing heat treatment:
This process ensures optimal corrosion resistance and mechanical properties.
Manufacturing follows rigorous quality control procedures:
5. ASME SA249 TP304/304L welded tubes Applications:
Superheater tubes: For increasing steam temperature beyond saturation point.
Heat exchanger tubes: For various heat transfer applications in power cycles.
Petroleum refining: Transferring hydrocarbons and process fluids.
Pharmaceutical manufacturing: Maintaining product purity in sterile processes.
Nuclear power: Selected applications where corrosion resistance is crucial.
Marine applications: Heat exchangers for shipboard systems.
Người liên hệ: Mia Wang
Tel: +8618457251994
Fax: 0086-574-88017980
