ASME SA139 Carbon Steel Saw Pipes Carbon Steel Spiral Welded Pipe For Automotive Industry
Product Details
ASME SA139 carbon steel pipes
,carbon steel spiral welded pipe
,automotive industry steel tubes
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
| Grade | C (max %) | Mn (max %) | P (max %) | S (max %) |
|---|---|---|---|---|
| A | 0.25 | 1.00 | 0.035 | 0.035 |
| B | 0.26 | 1.00 | 0.035 | 0.035 |
| C | 0.38 | 1.20 | 0.035 | 0.035 |
| D | 0.30 | 1.30 | 0.035 | 0.035 |
| E | 0.30 | 1.40 | 0.035 | 0.035 |
Mechanical Properties
| Grade | Min Yield Strength (psi / MPa) | Min Tensile Strength (psi / MPa) |
|---|---|---|
| A | 30,000 psi (~205 MPa) | 48,000 psi (~330 MPa) |
| B | 35,000 psi (~240 MPa) | 60,000 psi (~415 MPa) |
| C | 40,000 psi (~290 MPa) | 70,000 psi (~485 MPa) |
| D | 42,000 psi (~290 MPa) | 60,000 psi (~415 MPa) |
| E | 52,000 psi (~360 MPa) | 66,000 psi (~455 MPa) |
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.
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