ASME SA139 Carbon Steel Spiral-Welded Saw Pipes for Automotive Industry

Material
These pipes are manufactured from carbon steel conforming to the ASME SA139 (ASTM A139) specification for electric-fusion (arc) welded spiral‑ or straight‑seam pipe. They are designed for conveying liquids, gases, or steam and are suited to high‑strength structural and pressure‑resistance requirements (cited per ASTM A139/A­139M).

Specifications
• Nominal Pipe Size (NPS): 4″–92″ (typical automotive use: 4″–36″)
• Wall Thickness: up to 1.0 inch (25.4 mm) typical
• Form: Spiral‑welded (SAW/SSAW) pipe, saw‑cut ends, plain/beveled/treaded finish

Chemical Composition

Mechanical Properties

Major Characteristics
– High strength and toughness for pressure resistance.
– Fabrication flexibility: spiral welding enables large diameter and long lengths.
– Consistent quality through standardized electric‑fusion weld process.
– Economical production compared to seamless or LSAW alternatives.
– Suitable for straight or saw‑cut end finishes for custom assembly.

Applicable Standards
ASTM A139 / ASME SA139 provides grade definitions, chemical and mechanical requirements, and testing protocols.

Applications in the Automotive Industry
– Structural frames or supports: large‑diameter tubular supports or lift shafts.
– Fluid transport systems: low‑pressure oil or coolant delivery under vehicle assembly.
– Hydraulic or pneumatic conduit: robust piping for material handling or robotics within plants.
– Engineering equipment: machinery and structural piping in automotive manufacturing facilities.

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

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.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

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.