Professional Grade Drill API 5L 316L Oil Casing & Multi-Alloy Seamless Steel Pipes
Process
OD Range
WT Range
ID Range
Hot Rolling
25 mm ~ 530 mm
3 mm ~ 130 mm
/
Normal Cold Drawing
4 mm ~ 325 mm
0.5 mm ~ 30 mm
/
Cold Rolling
4 mm ~ 273 mm
0.3 mm ~ 25 mm
/
Hot Expansion
245 ~ 1020 mm
6 mm ~ 80 mm
/
Honing
/
3.5 mm ~ 40 mm
30 mm ~ 400 mm
Process
OD Tolerance
ID Tolerance
Straightness
Hot Rolling
±1%
/
≤3 mm/m
Normal Cold Drawing
±0.1 ~ 0.5 mm
±0.1 ~ 0.5 mm
1 mm/m
High Precision Drawing
±0.05 ~ 0.3 mm
±0.05 ~ 0.5 mm
0.5 ~ 1.0 mm/m
Cold Rolling
±0.05 ~ 0.2 mm
±0.05 ~ 0.2 mm
0.5 ~ 1.0 mm/m
Frequently Asked Questions
Do your seamless steel pipes comply with international standards?
Yes, our seamless steel pipes strictly adhere to international standards such as ASTM, API 5L/5CT, and EN 10216. We are certified with ISO 9001 and provide complete material test reports (MTRs) for every batch.
How do you guarantee pressure and corrosion resistance?
We employ precision hot-rolled/cold-drawn processes combined with non-destructive testing (ultrasonic and eddy current). Each batch undergoes mechanical property tests to ensure performance under extreme conditions.
What is your typical lead time for delivery?
We maintain a large inventory and automated production lines, ensuring a 7-15 day lead time for standard orders. Urgent requests can often be processed for shipment within 3-5 working days.
Can you provide customized sizes or special coatings?
Absolutely. We offer comprehensive customization for outer diameter, wall thickness, length, and surface treatments like galvanization, spray coating, or specialized alloy compositions.
What type of packaging is used for international shipping?
We use standard sea-worthy packing, including hexagonal bundles tied with steel strips, plastic caps to protect pipe ends, and waterproof wrapping where necessary to ensure the product arrives in perfect condition.
Do you support third-party inspections?
Yes, we welcome third-party inspections from agencies like SGS, BV, or Lloyd's Register to verify chemical composition, dimensions, and mechanical properties before shipment.
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