Seamless, ERW, LSAW and SSAW carbon steel pipe supplied by standard, grade, outside diameter, wall thickness and end condition, with cutting, beveling, testing, surface protection and export packing available.
The manufacturing route affects available diameter, wall thickness, weld inspection and price. If your drawing already specifies seamless, ERW, LSAW or SSAW, send it as written.
Common for pressure service, mechanical use and orders that require a seamless tube wall.
Often selected for A106, A333 and other seamless pipe requirements.Used for general piping, fabrication, structural work and many medium-diameter pipe orders.
The longitudinal weld seam becomes part of the inspection route.Common for large-diameter project and pipeline pipe where heavier wall and a longitudinal seam are required.
Geometry and weld-seam inspection are important on large sizes.Used for larger diameters and long pipeline sections where a spiral-welded production route fits the project.
Pipe diameter, spiral seam and project testing requirements are confirmed together.Send the grade exactly as it appears on your RFQ or drawing. If only the service, size or a familiar material name is given, we can confirm the appropriate pipe specification before quotation.
A53 is common in general pipe supply, A106 in seamless pressure service, and A333 Grade 6 where low-temperature service is specified.
PSL level, manufacturing route and testing requirements are confirmed from the project specification.
Pressure-pipe and structural-pipe requirements are kept separate during quotation so the correct standard is used.
JIS grade is matched to the required service, temperature range and manufacturing route.
Send the OD, wall thickness and application shown on your drawing or material list. We will check whether the requirement should be supplied under a structural pipe/tube specification or another applicable pipe standard rather than treating A36 as a universal pipe specification.
Outside diameter and wall thickness determine the basic pipe size. Length, manufacturing route and end condition then define how the pipe will be produced and packed.
| Pipe Route | Typical OD | Typical Wall Thickness |
|---|---|---|
| Seamless | 10–660 mm | 1.5–100 mm |
| ERW | 21.3–660 mm | 1.5–25 mm |
| LSAW | 406–1,420 mm | 6–60 mm |
| SSAW | 219–3,000 mm | 5–30 mm |
5.8 m, 6 m, 11.8 m and 12 m are common export lengths; fixed cut lengths can also be reviewed.
Tolerance is confirmed from the applicable pipe standard rather than using one tolerance for every pipe route.
Pipe ends affect welding, connection and site installation. State the required end condition in the RFQ whenever it is part of the project specification.
Standard cut pipe end for general fabrication or further preparation.
Prepared for butt welding when the required bevel geometry is specified.
Available for suitable pipe sizes and standards where threaded connections are required.
Pipe can be cut to project length before final end inspection and packing.
Surface treatment should match storage, transport and the final environment. Black pipe and galvanized pipe are different purchasing routes, even when the base material is similar.
Natural mill surface for many structural and general piping orders.
Temporary rust protection can be applied before storage or shipment.
External protective coating can be reviewed when the project calls for a specific system.
For regular zinc-coated pipe supply, use the dedicated galvanized pipe route.
A pipe can have the correct nominal size and still create fit-up problems if ovality, straightness or the pipe end is outside the required tolerance.
Actual diameter and wall thickness are checked using suitable measuring tools at the correct positions.
Important where pipe alignment, fabrication or site assembly depends on geometry.
Cut ends and bevel geometry are checked when they form part of the order requirement.
Seamless and welded pipe do not use an identical inspection route. Testing is selected from the pipe standard and project requirement rather than added as a generic checklist.
Used where the applicable pipe standard or project specification requires pressure testing.
Ultrasonic or other specified NDT is applied where required by the manufacturing route and order.
Surface, dimensions and pipe ends remain part of the final release inspection.
ERW, LSAW and SSAW pipe each have a weld route that must be considered during inspection. The seam is reviewed together with pipe geometry and the specified NDT level.
Visible seam condition is checked before release.
The weld area is tested according to the applicable standard or project procedure where required.
For LSAW and SSAW pipe, diameter, roundness and straightness are reviewed together with the seam.
Long mill lengths can be cut and the ends prepared before shipment when the project needs fixed-length pieces or welding-ready ends.
Pipe can be cut to specified project lengths where the order route supports it.
Weld preparation is matched to the confirmed bevel requirement rather than using one default edge.
Machined, threaded or prepared ends can receive additional protection before packing.
Pipe marking, batch records and MTC information need to stay connected when long lengths are cut, bundled or repacked.
Small bundled pipe, threaded pipe and large-diameter line pipe do not need the same handling plan.
Bundled with suitable steel straps, package identification and end protection where required.
Thread protectors or caps are used where exposed ends could be damaged during handling.
Individual supports, chocks and anti-rolling protection are used according to pipe size and transport method.
Send the OD, wall thickness, length and application. We will review the correct structural pipe or tube specification for the actual supply route instead of assuming A36 is the final pipe standard.
Seamless pipe has no longitudinal weld seam. ERW pipe is produced from strip or coil with a longitudinal welded seam. Which one you need depends on the standard, pressure/service requirement, size range and project specification.
Yes, for suitable orders. Send the required finished length and bevel detail so the cutting and end-preparation route can be confirmed before processing.
Yes, where the size and project route support galvanizing. For regular galvanized pipe purchasing, the dedicated Galvanized Steel Pipe page is the better starting point because coating condition becomes part of the main product specification.
Standard or grade, OD, wall thickness, length, quantity and destination are enough to start. Add pipe end, coating and testing details when they matter to the project.
