Stainless Steel 304 Welded Pipes

Stainless steel 304 welded pipes are austenitic 18/8 alloy components produced by roll-forming and seam-welding flat-rolled strips. Manufactured to ASTM A312 and A358 standards, these pipes provide reliable corrosion resistance and structural stability for general-purpose and high-temperature industrial piping systems.

These pipes deliver a minimum tensile strength of 515 MPa and a yield strength of 205 MPa in the annealed state. Available from 1/8" NB to 36" NB and schedules SCH 5S to 80S, they offer excellent weldability and durability without the need for filler metals during production.

Major industries like chemical processing, pharmaceuticals, food, and water treatment use these pipes. They provide reliable performance. Such reliability is essential for surviving harsh industrial conditions.

Stainless Steel 304 Welded Pipes Price

Standard SS 304 welded pipes in 2B mill finish cost approximately ₹170-₹450 per kg in the Indian market. These welded sections deliver higher cost-effectiveness than seamless pipes of the same grade. Diameter, wall thickness, and surface specs determine the price per meter. These figures reflect current industrial trends. Contacting reliable distributors helps buyers secure precise quotes for their projects. 

Factors Affecting Price

The following market elements directly influence the current price list for welded pipes made from grade 304 stainless steel. Track these variables. 

• Nickel Market Price: Fluctuations in nickel trading prices significantly drive the base cost of this 8% nickel alloy.
  
  
• Dimensions and Schedules: Larger diameters and heavier wall thicknesses increase the raw material volume and total production time.
  
  
• Manufacturing Method: Conventional ERW pipes offer a more cost-effective material choice. Higher welding expenses associated with large-diameter EFW pipes make them less economical. Standard ERW options provide significant project savings.
  
  
• Surface Finish: Specialized polishing or bright annealing adds extra processing steps compared to standard industrial mill finishes.
  
  
• Quality Certification: Providing EN 10204 3.1 material test certificates from third-party agencies requires a modest administrative premium.
  
  
• Procurement Volume: Per-kilogram pricing is better for large mill-run orders than tiny spot purchases.

Types of Stainless Steel 304 Welded Pipes

The inventory includes several manufacturing and finish variants designed to suit specific industrial and structural piping needs:

• Straight-seam ERW (Electric Resistance Welded) Pipes
• Straight-seam EFW (Electric Fusion Welded) Pipes
• LSAW (Longitudinally Submerged Arc Welded) Pipes
• Bright Annealed Welded Pipes
• Pickled and Passivated Welded Pipes
• Polished Welded Pipes

Stainless Steel 304 Welded Pipes Specifications

The table below outlines the key specification parameters for stainless steel 304 welded pipes that buyers should reference during procurement.

Chemical Composition of Stainless Steel 304 Welded Pipes

Chemical composition limits for grade 304 (TP304) per ASTM A312 and ASTM A358. These limits apply to the base metal; the weld zone must meet equivalent properties.

Chromium (18–20.00%) produces the passive self-healing layer. Nickel (8.00–10.50%) stabilises austenite, inhibiting martensite transition during cold-working. Carbon (max 0.08%) prevents intergranular corrosion at the weld heat-affected zone without post-weld heat treatment in most welded pipe applications.

Mechanical Properties of Stainless Steel 304 Welded Pipes

Minimum mechanical property requirements for ASTM A312 TP304 welded pipes in the annealed condition.

Physical Properties of Stainless Steel 304 Welded Pipes

Physical properties of grade 304 in the annealed condition, applicable to welded-form pipes.

Stainless Steel 304 Welded Pipes Size Chart

This size chart lists commonly supplied NPS sizes for stainless steel 304 welded pipes with outer diameter and typical schedule availability.

Schedule Chart of Stainless Steel 304 Welded Pipes

The following chart provides a comprehensive breakdown of pipe dimensions and wall thicknesses to assist buyers with selection:

Key Features of Stainless Steel 304 Welded Pipes

These pipes provide various distinct benefits that make them a cost-effective and dependable option for modern engineering:

• Cost Efficiency
• Availability in Large Diameters
• Consistent Wall Thickness
• Wide Schedule Range
• Corrosion Resistance
• Good Heat Exchanger Performance
• Multiple Surface Finish Options

Applications of Stainless Steel 304 Welded Pipes

Grade 304 welded pipes are widely utilised across these major industries for fluid transport and structural support:

• Chemical Processing Plants
• Pharmaceutical Manufacturing
• Food and Beverage
• Water Treatment
• Heat Exchangers
• Oil and Gas Utility Lines
• Power Generation
• Pulp and Paper

How to Choose the Right Stainless Steel 304 Welded Pipes Supplier?

Choosing the right material for a project has a direct impact on output quality and structural reliability. The following are points that must be considered before buying a Stainless Steel 304 Welded Pipes Supplier.

Selecting the Right Supplier

Choosing among SS 304 Welded Pipe suppliers starts with verifying the material standard they supply. Confirm ASTM A312 or ASTM A358 as applicable for your service. Suppliers who quote without referencing a standard may be offering non-standard or re-rolled material.

Technical Considerations

The weld zone is crucial for welded pipe. Ask for pressure-rated weld-seam radiography or ultrasonic test data. ASME B31.3 Class 1 service requires 100% radiographic seam testing of welded pipe. Annealing restores heat-affected zone corrosion resistance; thus, check whether the pipe is supplied as-welded or solution-annealed.

Evaluating Supplier Credibility

For the EU market delivery, PED approval is mandatory. Therefore, shortlist SS 304 Welded Pipe suppliers with this certification and solid export backgrounds. They should handle third-party inspections and maintain ISO 9001, 14001, and 45001 standards. These credentials prove their commitment to quality management, environmental systems, and occupational safety throughout their manufacturing processes.

Procurement Strategy

Specify the standard, grade, and pipe type on every purchase order. List the NPS, schedule, length, finish, and delivery condition clearly. Always request test documentation. Arrange third-party inspections at the mill for large projects. This proactive approach ensures total compliance and material quality.