Introduction
Seamless 304 Stainless Steel Tubing is a type of stainless steel pipe manufactured without welded seams, eliminating welded joints and ensuring a continuous, uniform structure. It is widely applied for a variety of industrial piping applications.
| Tolerance | ±1% |
| Standard | AISI, ASTM, DIN, JIS, GB, JS, SUS, EN |
| Alloy Or Not | Is Alloy |
| Type | Seamless |
| Surface Finish | BA/2B/NO.1/NO.3/NO.4/8K/HL/2D/1D |
| Out diameter | 22mm-630mm, can be customized |
| Length | 3m/4m/5m/6m |
| Thickness | 1-100mm, can be customized |
| Application | Construction, chemical industry, petroleum and natural gas, electric power, machinery manufacturing, etc. |
Features
- Reliability
Manufactured without weld seams, the tubing offers a continuous metal structure that enhances reliability and reduces potential leakage risks.
- Pressure-resistance
Resists pressure better (withstanding up to 10-15 MPa in standard sizes) and avoids corrosion accumulation at welds.
- Strong Corrosion Resistance
With chromium content ≥12%, it forms a dense oxide film on the surface, resisting weak corrosive media such as air, steam, and water, and chemical corrosive media like acids, alkalis, and salts.
- Easy to clean
The smooth and seamless surface design prevents dirt and residue from accumulating, allowing for quick and efficient cleaning while maintaining long-term hygiene and appearance.
Customization Options
- Outer Diameter Customization
The standard outer diameter range is 22mm-630mm, and the outer diameter sizes can be customized according to customer project requirements.
- Wall Thickness Customization
With a standard wall thickness of 1-100 mm, the thickness can be tailored to match different pressure and structural strength needs of various applications.
- Length Customization
On the basis of standard lengths of 3m/4m/5m/6m, customized lengths can be provided in line with GB14975-2002 specifications for different construction and processing requirements.
- Surface Finish Customization
Custom processing of specific surface finishes (BA/2B/NO.1/NO.3/NO.4/8K/HL/2D/1D) can be done according to the corrosion resistance and hygiene requirements of application scenarios.
- Hot-Rolled Size Customization
For hot-rolled tubing with a standard diameter range of 54-480mm, customized hot-rolled sizes within the processable range are available for large-diameter industrial applications.
- Cold-Drawn Size Customization
Cold-drawn tubing with a standard diameter of 6-200 mm supports custom cold-drawn sizes to meet the high-precision requirements of small- and medium-diameter applications.
Packing and Delivery
FAQ
Q: What types of seamless steel pipes are available, and what are their microstructures?
A: Our seamless steel pipes are manufactured using three main rolling methods: hot rolling, hot extrusion, and cold drawing. They feature advanced metallographic structures, including semi-ferrite, semi-martensite, martensite, and austenite systems, ensuring excellent strength, toughness, and durability for industrial applications.
Q: What are the standard diameter ranges for hot-rolled and cold-drawn pipes?
A: Hot-rolled pipes are available in diameters from 54 mm to 480 mm, suitable for large-scale and high-capacity applications. Cold-drawn pipes range from 6 mm to 200 mm, providing precise dimensions and superior surface quality for engineering projects that demand accuracy.
Q: How are hot-rolled and cold-drawn pipes produced and finished?
A: Hot-rolled pipes are produced by heating a round tube billet, punching it, and shaping it using a three-roll oblique rolling process. Cold-drawn pipes undergo annealing, acid washing, and multiple cold rolling steps to achieve tight tolerances. After rolling, all pipes are cut at right angles and deburred, ensuring smooth edges, precise lengths, and consistent quality for critical applications.
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