Shandong Tianyu Metal Products Co., Ltd. · Liaocheng, Shandong, China [email protected] +86 199 6352 2611
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Pile of galvanized round steel pipes on gravel ground

Steel Pipe Seamless Welded and Galvanized

The full pipe program from line pipe and casing through to square framing tube built around five ways in

Products 32Certificate Mill test certificate
Request A QuoteBrowse 32 Products

Steel pipe is one of the three forms Tianyu Metal produces, processes and sells, and this range covers everything from pressure carrying line pipe to structural framing sections. Five ranges are the way in: seamless steel tube for pressure and heavy wall duty, welded steel pipe covering ERW, LSAW and spiral submerged arc welded construction, square and rectangle steel tube for frames and structures, galvanized steel tube where the pipe stays outdoors, and stainless steel pipe where corrosion decides the grade. Inside those sit the specific products a project asks for by name, including ERW line pipe and casing pipe, LSAW line pipe, spiral welded pipe, precision seamless tube and seamless drill pipe. The problem it solves is fragmentation: a site package usually needs a pressure pipe, a structural section and a galvanized run at the same time, and buying each from a different mill turns one delivery into three.

Sub Ranges

Ways Into the Steel Pipe Range

Full Range

All 32 Products in Steel Pipe

The full pipe program from line pipe and casing through to square framing tube built around five ways in Items here also sit under Galvanized Steel Pipe, Seamless Steel Pipe, Square/Rectangle Steel Pipe.

Bundle of square steel tubes stacked inside a steel-framed shed

Galvanized Square Pipe

Zinc coated square and rectangular hollow section in ASTM JIS and EN BS grades

Specifications
Black square and rectangular steel tubes stacked with open ends

Welded Square Pipe

Welded square and rectangular tube in painted galvanized natural or 3PE coated finish

Specifications
Bundle of square steel tubes stacked inside a steel-framed shed

Seamless Square Pipe

Square hollow section with no longitudinal joint for machine frames and heavy wall duty

Specifications
Stack of black rectangular steel tubes with paper labels

Welded Rectangle Pipe

Square and rectangular welded hollow section finished black galvanized or coated to order

Specifications
Stack of large-diameter welded steel pipes with open ends

LSAW Welded Steel Pipe

Plate formed submerged arc welded pipe with a single straight seam for large bore duty

Specifications
Bundles of black steel pipes in varying diameters stacked outdoors

ERW Welded Steel Pipe

Electric resistance welded pipe from one strip source with a full mechanical test record

Specifications
Large-diameter steel pipes laid out in a crane-served factory hall

Spiral Welded Steel Pipe

Spiral submerged arc welded pipe for water gas oil and piling duty in large diameters

Specifications
Blue coated square steel tubes stacked in a workshop

Seamless Steel Pipe

Hollow section pipe with no joint around it for pressure and low temperature service

Specifications
Blue coated square steel tubes stacked in a workshop

Seamless Rectangle Pipe

Rectangular hollow section with no joint around it for frames columns and structures

Specifications
Problems Solved

What This Range Is For

One Project Split Across Three Mills

Line pipe, structural square tube and galvanized handrail pipe are normally quoted by different suppliers. Consolidating them into one order cuts the freight, the inspection visits and the document set down to a single shipment.

Welding Process Not Matched to the Duty

ERW, LSAW and spiral submerged arc welded pipe are not interchangeable across every pressure and diameter combination. Having all three routes available means the process is chosen for the duty rather than for what the supplier happens to make.

Seamless Bought Where Welded Would Do

Specifying seamless for a low pressure structural run adds cost that the design never needed. Where welded construction is acceptable it is offered alongside, and where it is not, seamless is available in the same order.

Outdoor Pipe Repainted Every Few Years

Black pipe used for fences, greenhouses and solar frames turns into a maintenance program. Galvanized seamless and welded pipe in round, square and rectangle sections removes the repaint cycle from the asset.

Sections That Do Not Exist in a Stock Table

Frames and skids often call for a section no stock list carries. Size is customized on the stainless range and cut to size processing runs across the pipe program.

Who Buys It

Buyers Who Order From This Range

  • Pipeline and energy contractors buying ERW and LSAW line pipe and casing pipe
  • Structural steel fabricators buying square and rectangle tube for frames, trusses and skids
  • Water, gas and infrastructure utilities specifying spiral welded pipe for large diameter runs
  • Greenhouse, fencing and solar mounting manufacturers using galvanized round and square pipe
  • Process and food plant contractors needing stainless pipe in 304, 316L, 2205 or 904L
  • Machinery builders specifying precision seamless tube for cylinders and hydraulic components
Core Advantages

Why Source This Range From Tianyu Metal

Five Ranges Reached From One Catalog

Galvanized, seamless, square and rectangle, stainless and welded pipe are each a route into the program, so a buyer can enter by process, by shape or by grade depending on how the drawing is written.

Every Common Welded Process Covered

ERW, LSAW and spiral submerged arc welded pipe are all in the range, which lets the diameter, wall and pressure class drive the choice instead of the supplier's single production line.

Oilfield Product Types Held Together

Line pipe, casing pipe and drill pipe appear as distinct products, so an oilfield package does not have to be assembled from three separate inquiries.

Three Section Shapes Across the Range

Round, square and rectangle sections exist in seamless, welded, galvanized and stainless construction, which matters when one structure mixes circular and box sections.

Recognized Standards on the Certificate

The stainless range is quoted against ASTM A312, EN10216 and JIS G3463, so the pipe is certified in the standard system your inspection body already works to.

Stated Delivery Window and Documentation

Delivery runs within 7-10 working days after the deposit is received or according to your order, and a mill test certificate can be issued with the material.

Application Scenarios

Where This Range Ends Up

Oil and Gas Transmission

ERW and LSAW line pipe for gathering and transmission runs, with casing pipe and drill pipe for the well side of the same project.

Water and Utility Networks

Large diameter spiral welded pipe for water mains, penstocks and industrial service lines where wall and diameter are the driving parameters.

Structural Frames and Skids

Square and rectangle tube for platforms, trusses, equipment skids and support frames that are cut and welded in the fabrication shop.

Greenhouse Solar and Agricultural Structures

Galvanized round and square pipe for frames that stay outdoors and cannot be taken out of service for repainting.

Hydraulic and Machine Building Components

Precision seamless tube for cylinder barrels, rollers and machined sleeves where the bore finish and wall consistency matter.

Process and Hygienic Piping

Stainless round, square and rectangle pipe in 304, 316L, 2205 and 904L for corrosive media, washdown areas and coastal installations.

Buying Guide

What To State When You Order

  1. Say which range you are in from seamless, welded, galvanized, square and rectangle, or stainless

  2. State outside diameter or section size, wall thickness and length, and whether lengths must be fixed

  3. Name the standard and grade you want certified, for example ASTM A312, EN10216 or JIS G3463 on stainless

  4. For welded pipe say whether ERW, LSAW or spiral submerged arc welded construction is required

  5. Confirm the surface and coating, including galvanizing, and how the ends are to be finished as plain, beveled or threaded

  6. State the bundling, end caps and marking your port, forwarder and site handling require

Related

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Questions Buyers Ask

Steel Pipe FAQ

Which pipe ranges does this category cover?

Galvanized steel tube, seamless steel tube, square and rectangle steel tube, stainless steel pipe and welded steel pipe. Each is a way into the same program, so start from whichever one matches how your drawing describes the pipe.

Do you supply ERW LSAW and spiral pipe or only one process?

All three are in the range as distinct products, including ERW line pipe and casing pipe, LSAW line pipe and spiral submerged arc welded pipe. Tell us the diameter, wall and service and we will confirm which process suits it.

Can I order pressure pipe and structural tube on one order?

Yes. That is the reason the range is held together. A package that mixes line pipe, square structural tube and galvanized pipe can ship as one consignment with one document set.

What standards can stainless pipe be certified to?

ASTM A312, EN10216 and JIS G3463 are quoted for the stainless range, covering grades such as 304, 304L, 316, 316L, 2205 and 904L in both seamless and welded construction.

How soon can the pipe ship after we place the order?

Delivery is within 7-10 working days after receiving the deposit, or according to your order quantity. Large diameter and fully customized sections are confirmed when the order is booked.

Do you supply galvanized pipe in square and rectangle sections too?

Yes. Galvanized welded and seamless pipe is available in round, square and rectangle sections, which is what greenhouse, fencing and solar mounting structures usually need.

Get a Quotation on Steel Pipe

Tell us say which range you are in from seamless, welded, galvanized, square and rectangle, or stainless and we will come back with price, availability and what the mill test certificate will show for steel pipe.

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