Galvanized Welded Rectangle Steel Pipe
Zinc coated welded rectangular section in lengths from 0.3 to 18 M
Specifications
Welded Pipe, Steel Pipe
ERW Line Pipe for Water Gas and Oil Transmission
Electric resistance welded line pipe coated and tested for low pressure fluid transmission
ERW line pipe is electric resistance welded steel pipe produced for the transport of low pressure liquids such as water, gas and oil. Pipeline contractors and distribution utilities specify it against API 5L, ASTM A53, EN10217 and JIS G3452, and select the external coating that suits the ground or climate the line runs through. Ordering the coating with the pipe removes the gap between mill delivery and coating yard availability that usually delays a lay schedule. Every length carries an EN 10204/3.1Ba certificate reporting chemistry, mechanical results and the hydrostatic test.
- Product Name — ERW Welded Steel Pipe Line Pipe
- Manufacturing Method — Electric resistance welded
- Standards — ASTM 53, EN10217, DIN 2458, IS 3589, JIS G3452, BS1387
- ASTM Grades — ASTM A53 GR A, GR B
- EN Grades — S275, S275JR, S355JRH, S355J2H
Why It Is Specified
Key Benefits of ERW Welded Steel Pipe Line Pipe
Coating Specified with the Pipe Order
Fusion bond epoxy, coal tar epoxy, 3PE, vanish coating, bitumen and black oil coating are applied to the customer requirement, so the line arrives ready to lay rather than ready to coat.
Transmission Grades Across Three Code Families
API 5L, ASTM A53 GR A and GR B, EN S275 to S355J2H and the GB L175 to L555 range are all available, so a route crossing two jurisdictions can still run on one supply.
Diameter Coverage for Trunk and Branch
Outside diameter from 21.3mm to 660.4mm covers service connections and trunk sections, which keeps branch tees and main line from separate procurement routes.
Wall Set Against the Operating Pressure
Wall thickness from 1.5 to 22.2mm allows a heavier wall on crossings and road sections while the open run stays on the lighter wall.
Pressure and Weld Testing Before Dispatch
Hydrostatic testing, flattening, bending, blow and impact testing are all carried out so seam problems are found at the mill, not in the trench.
Lay Lengths Cut to the Route
Lengths from 0.3 to 18 M are supplied, so tie in pieces and long straight pulls can be ordered on the same delivery.
Problems It Solves
What This Material Removes From Your Process
Coating Yard Capacity Holding Up the Lay
Bare pipe waiting for an external coating slot stops the trench crew. Coating applied to your specification before shipment keeps the pipe and the schedule together.
Uncertain Weld Integrity on a Buried Line
A seam that fails after backfill is expensive to reach. Hydrostatic, flattening, bending, blow and impact testing put the seam evidence on the certificate before the pipe leaves.
Grade Names That Do Not Match the Drawing
A route specified in one code and quoted in another creates approval delays. API 5L, ASTM A53, EN and GB grade lists are all quoted so the substitution is documented.
Tie In Pieces Cut from Full Lengths
Cutting long joints down for tie ins wastes coated pipe. Lengths from 0.3 M can be ordered so the short pieces arrive as ordered pieces.
Mixed Wall Requirement Along One Route
Crossings need more wall than open ground. A wall band from 1.5 to 22.2mm lets both parts of the route come from the same order.
Application Scenarios
Where It Is Used
Low Pressure Water Transmission
Distribution mains and feeder lines carrying water where a welded body and an external coating are enough for the duty.
Gas Distribution Networks
Gas lines built to API 5L or ASTM A53 grades where the hydrostatic test result has to be on file before commissioning.
Oil Gathering and Transfer Lines
Short transfer and gathering runs moving crude or product at low pressure between tanks, pumps and treatment skids.
Buried Lines in Aggressive Ground
Routes where 3PE or fusion bond epoxy is chosen over a simple varnish because the soil or groundwater attacks bare steel.
Oil Drilling Site Pipework
Surface pipework and utility runs on drilling sites where pipe is fitted quickly and coating damage is repaired in the field.
Machinery and Plant Fluid Runs
Manufacturing plant lines feeding process water, compressed media or fuel within the boundary of the site.
Who It Is For
Buyers Who Specify This Product
- Pipeline contractors buying coated line pipe against a fixed lay schedule
- Water utility engineers specifying welded transmission mains and feeder lines
- Gas network buyers ordering API 5L and ASTM A53 pipe with test documents
- Oilfield procurement teams sourcing low pressure gathering and transfer lines
- EPC project buyers matching coating type to the soil conditions along a route
- Distributors supplying coated welded pipe to regional civil contractors
Technical Data
Specifications and Technical Features
Values below come from the product data published by Shandong Tianyu Metal Products. Confirm the exact grade and size against your order.
| Product Name | ERW Welded Steel Pipe Line Pipe |
|---|---|
| Manufacturing Method | Electric resistance welded |
| Standards | ASTM 53, EN10217, DIN 2458, IS 3589, JIS G3452, BS1387 |
| ASTM Grades | ASTM A53 GR A, GR B |
| EN Grades | S275, S275JR, S355JRH, S355J2H |
| GB Grades | Q195, Q215, Q235, Q345, L175, L210, L245, L320, L360 to L555 |
| Outside Diameter | 21.3mm to 660.4mm |
| Wall Thickness | 1.5 to 22.2mm |
| Length | 0.3 to 18 M |
| Surface Treatment | Fusion bond epoxy coating, coal tar epoxy, 3PE, vanish coating, bitumen coating, black oil coating as per customer requirement |
| Certificate | EN 10204/3.1Ba |
| Tests | Chemical component analysis, tensile, yield, elongation, flattening, bending, blow, impact, exterior size inspection, hydrostatic |
| Place of Origin | China |
Technical Features
- Electric resistance welded ERW body for low pressure fluid transmission
- Outside diameter 21.3mm to 660.4mm
- Wall thickness 1.5 to 22.2mm
- Length 0.3 to 18 M
- Standards API 5L, ASTM 53, EN10217, DIN 2458, IS 3589, JIS G3452 and BS1387
- Surface treatment fusion bond epoxy, coal tar epoxy, 3PE, vanish, bitumen or black oil coating
- Grades ASTM A53 GR A and GR B, EN S275 to S355J2H, GB Q195 to Q345 and L175 to L555
- Certificate EN 10204/3.1Ba
Materials
- Carbon steel strip in ASTM A53 GR A and GR B
- EN grades S275, S275JR, S355JRH and S355J2H
- GB line pipe grades L175, L210, L245, L320 and L360 to L555
- GB structural grades Q195, Q215, Q235 and Q345
- External coating materials including epoxy, 3PE and bitumen systems
Certification
- API 5L
- ISO9001
- BV
- SGS
- RoHS
- EN 10204/3.1Ba certificate issued with the shipment
Manufacturing
How It Is Made and Processed
Strip preparation and edge trimming
Roll forming of the strip to the ordered diameter
Electric resistance welding of the longitudinal seam
Seam treatment and sizing
Hydrostatic testing and non destructive checks of the body
External coating to the specified system
Cutting to ordered length between 0.3 and 18 M
End protection, bundling and loading for export
Quality Control
Checks Before It Ships
- Chemical component analysis on the strip against the ordered grade
- Tensile strength, yield strength and elongation testing
- Flattening, bending, blow and impact testing on the welded body
- Hydrostatic test of each length before coating release
- Exterior size inspection of diameter, wall thickness and length
- EN 10204/3.1Ba certificate issued with the consignment
Customization
What We Can Change on Your Order
- External coating selected from fusion bond epoxy, coal tar epoxy, 3PE, vanish, bitumen or black oil
- Outside diameter anywhere from 21.3mm to 660.4mm
- Wall thickness set between 1.5 and 22.2mm per section of the route
- Cut lengths from 0.3 to 18 M against the lay drawing
- Grade selected from the API, ASTM, EN or GB lists
- End protection and bundle marking arranged for the discharge port
Comparison
ERW Welded Steel Pipe Line Pipe Against the Alternatives
| Seamless line pipe | ERW pipe gives a consistent wall from strip and is normally the quicker route to large quantities of the same diameter for a low pressure line. |
|---|---|
| SSAW spiral welded pipe | ERW covers the smaller band from 21.3mm to 660.4mm where a spiral seam is not practical, so branch and service sizes come from here. |
| Uncoated black pipe wrapped on site | Factory applied 3PE or fusion bond epoxy is put on under controlled conditions rather than over a trench, and only joint areas are wrapped in the field. |
| Ductile iron pipe | Welded steel joints make a continuous line that resists pull out on long runs and can be cut and rewelded to change a route. |
Use Guide
Specifying Handling and Welding Notes
- Choose the coating against the ground and climate along the route before you fix the pipe grade
- Keep the heavier wall from the 1.5 to 22.2mm band for crossings and casing sections and the lighter wall for open trench
- Order short tie in lengths down to 0.3 M rather than cutting coated joints on site
- Handle coated pipe on padded slings and avoid dragging it along the stockpile
- Repair coating damage at welded joints before backfill so the barrier is continuous
- Request the EN 10204/3.1Ba certificate at order stage so the hydrostatic record is filed with the line documents
Questions Buyers Ask
ERW Welded Steel Pipe Line Pipe FAQ
What pressure duty is this pipe intended for?
It is made for low pressure liquid transportation such as water, gas and oil, along with oil drilling and machinery manufacturing service. Send the design pressure and we will confirm the grade and wall.
Which external coatings can you apply?
Fusion bond epoxy coating, coal tar epoxy, 3PE, vanish coating, bitumen coating and black oil coating are applied as per customer requirement.
What is the largest diameter you can supply in ERW?
Outside diameter runs to 660.4mm, with the range starting at 21.3mm. Above that band the spiral welded pipe is the usual route.
Can you supply API 5L line pipe grades?
Yes. API 5L is listed for this pipe along with ASTM A53 GR A and GR B and the GB L175 to L555 grades.
What testing is done on the weld seam?
Flattening, bending, blow and impact testing are carried out along with a hydrostatic test and exterior size inspection, and results appear on the certificate.
Do you ship random lengths or cut lengths?
Lengths from 0.3 to 18 M can be supplied. Give us the lay drawing and the pipe will be cut before coating and packing.
Which certificate do you issue?
EN 10204/3.1Ba, covering chemical component analysis, mechanical properties and the technical tests carried out on the consignment.
Same Range
Related Products
Galvanized Welded Square Steel Pipe
Four equal faces and a zinc coating for frames posts and site structures
Specifications
Welded Square Pipe
Welded square and rectangular tube in painted galvanized natural or 3PE coated finish
Specifications
Welded Rectangle Pipe
Square and rectangular welded hollow section finished black galvanized or coated to order
SpecificationsGo Deeper
Industries and Guides Related to This Product
Oil Gas and Pipelines
Pipeline and wellsite buyers are not really buying steel, they are buying a pressure boundary and the paperwork that proves it. Th
Read more
Construction and Infrastructure
Construction and infrastructure buyers order steel by the part it becomes: mild steel plate for base plates gussets and stiffeners
Read more
Power Generation and Energy
Energy projects are audited on documents as much as on steel. A boiler header, a cooling water line, a coal transfer chute and a s
Read moreNeed a Price on ERW Welded Steel Pipe Line Pipe
Send the grade, thickness, width and quantity you need together with your destination port. A cutting list or drawing gets you a firmer number.