304 welded pipe
2. Standard: ASTM A312, ASTM A358, ASTM A240, engineered strictly to international welded pipe parameters
3. Process: High-precision automated TIG, Plasma, or Laser longitudinal welding from calibrated premium steel strips
4. Size Range: Outside Diameter from 1/2" up to 48" (DN15 - DN1200) with customizable single or double random lengths
5. Heat Treatment: Full post-weld solution annealing to completely recrystallize, normalize, and strengthen the weld zone
6. Surface Finish: As-welded bead, interior weld bead removed flush (bead-conditioned), or passivated clean finishes
7. Application: Water treatment facilities, low-pressure industrial steam loops, municipal drainage, and decorative piping
8. Service Advantage: 100% Eddy Current tested, optional X-ray radiography (RT) on welds, and flexible low MOQ for trial orders
9. Packaging: Secure sea-freight bundle packing wrapped with waterproof plastic bags or loaded with heavy lifting slings
10. Key Advantage: Offers perfect dimensional concentricity and outstanding line roundness at a highly competitive pricing structure
304 Welded Pipe – Premium Industrial Piping Solutions with Superior Weld Integrity and Cost Performance
HEBEI ALL TRUST STEEL CO., LTD specializes in manufacturing high-quality 304 welded pipe engineered for demanding industrial applications. We manufacture precision-welded stainless steel pipe with an annual production volume of over 15,000 tons and a maximum outer diameter of 1016 mm. All piping is 100% eddy current tested, ensuring the integrity of the weld seam. Each product is manufactured to fulfil the strict ASTM A312 and ASME SA312 requirements, combining the proven corrosion resistance of 18-8 austenitic stainless steel with the latest in automated TIG, plasma or laser welding technologies. This method of total solution annealing recrystallizes the weld zones, ensuring the uniformity of mechanical qualities across the whole length of the pipe and dimensional tolerances within ±0.05 mm for essential industrial installations.
What Makes 304 Welded Pipe the Industry-Preferred Choice
This tubular product is made of austenitic stainless steel and is manufactured via precision roll forming of calibrated steel strips and longitudinal fusion welding. It is stabilised by a passive oxide layer and contains 18% chromium and 8% nickel, which protect it against oxidation and mild chemical attack.
You have better dimensional consistency than conventional production processes. The automated welding technique provides excellent roundness and concentricity, important in fluid system installations where tight tolerances are necessary.
Manufacturing is done using superior virgin stainless steel coils. These materials are formed into tubular profiles on our manufacturing lines and then welded using high-precision processes. Post-weld solution annealing normalises the heat affected zone, removes the possibility of sensitisation and provides uniform corrosion resistance.
Internal weld bead removal provides smooth interior surfaces with low pressure drop and inhibits particle collection for hygienic applications. You get pipe that functions dependably in water treatment, food processing and architectural systems.
Technical Specifications & Manufacturing Standards
| Parameter | Specification Details |
|---|---|
| Manufacturing Standards | ASTM A312 / ASME SA312 / ASTM A358 / EN 10217-7 |
| Material Grade | 304 (UNS S30400 / 1.4301) |
| Welding Technology | Automated TIG / Plasma / Laser Longitudinal Welding |
| Outer Diameter Range | 1/2" – 48" (13.7 mm – 1219.2 mm) |
| Wall Thickness Options | SCH 5S / SCH 10S / SCH 40S / SCH 80S (0.5 mm – 30 mm) |
| Standard Lengths | 5.8 m / 6 m / 11.8 m / 12 m / Custom Cut Available |
| Surface Finish | Solution Annealed & Pickled / Bright Annealed / Bead Removed |
| End Configuration | Plain End (PE) / Beveled End (BE) |
| Quality Testing | 100% Eddy Current + Hydrostatic + Optional X-ray RT |
| Mechanical Properties | Yield Strength ≥205 MPa / Tensile Strength ≥515 MPa |
| Quality Documentation | EN 10204 3.1 & 3.2 Mill Test Certificates |
| Third-Party Inspection | SGS / BV / TÜV / DNV Accepted |
We have a manufacturing plant that is very tight to international norms. With every delivery you’ll get full material traceability paperwork including PMI analysis results proving the exact chromium-nickel makeup.
Core Performance Advantages for Your Applications
Precision Welding Technology
Advanced automated longitudinal fusion systems create metallurgically sound joints without filler metal addition. The weld zone shares identical chemical composition with the base material, eliminating weak points in your piping system.
Our 100% radiographic inspection protocol detects any microscopic imperfections before shipment. You install piping with complete confidence in structural integrity.
Cost-Effective Large-Bore Solutions
If your project calls for diameters larger than 24 inches you'll save a considerable amount of money using 304 welded pipe vs. a seamless option. The roll-forming technique produces large-diameter tube without sacrificing the homogeneity of the wall thickness.
You optimise the procurement budgets, while ensuring the corrosion resistance and mechanical strength necessary to the municipal water networks and industrial drainage systems.
Dimensional Consistency for Complex Installations
Tight tolerance control ensures perfect alignment during field assembly. Our automated production maintains outer diameter variance within 1% across entire pipe lengths.
This precision reduces installation time and eliminates costly field modifications. Your fabrication teams work more efficiently with materials that fit specifications exactly.
Superior Surface Quality Options
Bright annealing produces mirror-finish interiors for pharmaceutical and semiconductor applications. The smooth surface reduces germ colonisation and enables cleaning processes.
Mechanical polishing provides beautiful surfaces for architecture projects that resist coastal air conditions without discoloration. You get plumbing that looks great for decades of service.
Industrial Applications & Performance Environments
Water Treatment Infrastructure
Municipal treatment facilities rely on this material for chlorinated water transport. The passive chromium oxide layer resists continuous exposure to treatment chemicals while maintaining smooth flow characteristics.
Food & Beverage Processing
Dairy plants and breweries specify this piping for product contact applications. The non-reactive surface preserves flavor integrity and survives aggressive CIP cleaning cycles without degradation.
Chemical Processing Systems
Mild acid and alkaline solutions flow safely through these conduits. Your facility benefits from corrosion resistance that extends system life beyond carbon steel by 300-500%.
Architectural & Structural Applications
Handrails, balustrades, and decorative columns maintain structural integrity in high-traffic environments. The combination of strength and atmospheric corrosion resistance supports long-term aesthetic requirements.
Quality Assurance & Testing Protocols
Every production batch undergoes comprehensive inspection before leaving our facility:
Non-Destructive Testing
- Eddy current examination scans 100% of weld seam length
- Hydrostatic pressure testing verifies containment integrity
- Optional X-ray radiography documents internal weld quality
Mechanical Verification
- Flattening tests confirm weld seam ductility
- Tensile testing validates minimum strength requirements
- Hardness measurements ensure proper heat treatment
Chemical Analysis
- PMI confirms 18-8 chromium-nickel composition
- Carbon content verification prevents sensitization risks
- Trace element analysis ensures compliance with material standards
You receive complete documentation packages including Mill Test Certificates, PMI reports, and dimensional inspection records with every order.
Customization Capabilities & Flexible Services
Our advanced processing equipment accommodates specialized requirements:
- Precision laser cutting to exact project lengths
- Edge beveling for weld preparation
- Threading and grooving for mechanical joining systems
- Custom surface treatments including passivation
- Mixed-container loading with fittings and flanges
Minimum order quantities remain flexible for trial projects and prototype development. You access enterprise-grade manufacturing capabilities without excessive volume commitments.
FAQ
Q：How does this product maximize financial efficiency while maintaining high pressure containment limits?
A：This pipe capitalizes on high-precision automatic roll-forming of uniform steel plates, providing exceptional wall thickness consistency and outstanding cost-effectiveness for large-bore pipeline networks. The manufacturing process reduces material waste while delivering structural integrity suitable for medium-pressure industrial systems.
Q：What specific welding technologies are integrated to ensure the metallurgical equivalence of the joint seam?
A: Advanced automated longitudinal TIG, plasma or laser fusion lines without addition of filler metal are used. So the welded zone has equal chemical and mechanical characteristics with the base metal. This method reduces the potential of galvanic corrosion at the weld contact.
Q: Which volumetric testing method guaranties the total integrity of the automated longitudinal weld?
A: The whole length of the straight-seam weld track is required to undergo 100% radiological inspection (RT/X-ray) or automated volumetric ultrasonic scanning (UT) to ensure joints are fully fused. We demand a double verification process which is beyond industry norms.
Q：What massive dimensional customization limits can be achieved for high-volume municipal flow grids?
A：We can manufacture custom large-bore configurations extending up to 48 inches or greater, accommodating customized double-welded seam alignments and tailor-made edge beveling angles. Our facility handles specialized dimensions that standard mills cannot produce economically.
Q：How are these welded pipes packaged to prevent internal corrosion or debris accumulation during transit?
A：Every pipe is thoroughly passivated, bundled with protective strapping slings, wrapped inside heavy waterproof weaving bags, and tightly sealed with hard plastic dust caps. This multi-layer protection system maintains pristine internal surfaces throughout international shipping.
Contact Us
Our engineering team provides material selection guidance, corrosion analysis, and custom fabrication consultation for 304 welded pipe. Request detailed specifications and project quotations at info@hballtrust.com to optimize your piping system design with proven industrial solutions.
