Stainless pipes and tubes in 304, 304L, 316, 316L and 202 to ASTM A312, seamless and welded, SCH 5S through SCH 160. EN 10204 3.1 certification and NDT available, Mill Test Certificate on every shipment.
Seamless pipe is extruded from solid billet with no weld seam. Welded pipe is formed from strip and seam-welded. Seamless costs substantially more, and for a large share of applications it is not required.
Specify seamless where pressure rating, cyclic loading or code requirements demand it. For structural, general fluid transfer and low-pressure service, welded pipe to ASTM A312 is fully compliant and significantly cheaper. Paying for seamless where welded suffices is one of the most common overspends in pipe procurement.
Schedule number defines wall thickness for a given nominal bore. It is not a diameter — a common source of confusion. The same schedule gives different wall thickness at different pipe sizes.
Always state nominal bore (NB or NPS) together with schedule. "2 inch SCH 40" is a complete specification; "2 inch pipe" is not, and the wall thickness difference between SCH 10S and SCH 80 at that size is substantial in both weight and price.
On specifications: the figures above reflect standard industry specifications for this product. Your actual batch values are confirmed on the Mill Test Certificate or Certificate of Analysis issued against your specific lot — provided with every shipment, and with sample orders before you commit to bulk. We do not ask buyers to take a specification on trust.
Pipe going into pressure service attracts more documentation scrutiny than any other steel form. Specify your certification requirement at enquiry stage, not after production.
HS Code 7304 (seamless) · 7306 (welded). Certificate of Origin provided for all destinations.
MOQ is discussed at order stage based on size and schedule. Payment by advance TT, LC at sight, or DP/DA case by case.
Seamless is extruded from solid billet with no weld seam and carries a higher pressure rating for a given wall, but it costs substantially more. Welded pipe to ASTM A312 is fully compliant for structural, general fluid transfer and low-pressure service. Paying for seamless where welded suffices is one of the most common overspends in pipe procurement.
Schedule defines wall thickness for a given nominal bore. It is not a diameter, which is a common source of confusion, and the same schedule number gives different wall thickness at different pipe sizes. Always state nominal bore together with schedule: "2 inch SCH 40" is complete, "2 inch pipe" is not.
SCH 5S and 10S are light wall for low pressure, sanitary and general service. SCH 40 or 40S is the standard default for general purpose. SCH 80 or 80S handles higher pressure and mechanical loading, and SCH 160 is for critical high-pressure service. The weight and price difference between the extremes at the same bore is substantial.
Seamless stainless pipes and tubes are exported under HS Code 7304. Welded stainless pipes and tubes fall under HS Code 7306. We declare the correct code based on the type ordered.
Yes, on request. It is an inspector-signed Mill Test Certificate required for pressure equipment in the EU under PED 2014/68/EU. It has to be arranged at the mill during production rather than issued retrospectively, so specify it at enquiry stage.
Yes. Hydrostatic testing is performed per ASTM A312 requirements as standard. Eddy current and ultrasonic testing are available on request, with the report supplied alongside the Mill Test Certificate. Specify NDT requirements at enquiry stage as they affect production route and cost.
Technical drawings welcome. FOB or CIF pricing within 24 hours. Third-party inspection available.
Technical drawings welcome. FOB or CIF pricing, samples available.
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