Seamless Steel Pipe Pipeline Pipe
Line pipe for oil and gas transmission with ends prepared before it leaves the mill
Specifications
Line Pipe Casing and Drill Pipe for 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.
Pipeline and wellsite buyers are not really buying steel, they are buying a pressure boundary and the paperwork that proves it. That means line pipe to API 5L in the right X grade, casing to API 5CT in the right connection and weight, drill pipe to API SPEC 5DP, and a coating system that will survive the ditch or the seabed. When an X52 order arrives as a plain A53 Grade B pipe, or when the hydrostatic and X-ray results are missing from the certificate, the joint cannot be welded into the string and the spread stands idle. Tianyu Metal supplies seamless ERW LSAW and SSAW pipe against the named API standard with the test report and EN 10204 certificate attached to the shipment.
Pain Points
What Goes Wrong Buying Steel For Oil Gas and Pipelines
Pipe Grade Downgraded Between Quote and Delivery
API 5L X52 X60 and X65 carry different yield levels from A53 Grade B. A quiet substitution changes the design pressure of the line and the welding procedure the crew has already qualified.
Missing Hydrostatic or X Ray Results
Welded line pipe is expected to arrive with hydrostatic test results, and LSAW and SSAW with X-ray results as well. Without those records the joint cannot be signed into the pipeline file.
Coating Chosen Without the Ditch Condition
Fusion bond epoxy coal tar epoxy 3PE bitumen and polyurethane foam insulation all suit different soils temperatures and service. Picking the default coating means recoating in the field.
Casing Grade and Connection Mismatch
H40 J55 K55 N80 L80 13Cr C90 T95 and P110 are not interchangeable. A grade swap on a casing string changes collapse and burst rating and can stop the drilling program.
Wrong End Preparation Arriving at the Spread
Bevel ends are expected above two inches and plain ends at or below two inches. Pipe that turns up plain when the crew is set up for bevelled ends means field bevelling before a single weld is made.
Random Lengths on a Fixed Length Job
Line pipe is offered as 5.8m 6m or 12m fixed and 2-12m random. Random lengths on a tie in spread mean more field welds and more radiography than the schedule allowed for.
Requirements
What This Sector Needs From a Steel Supplier
- Line pipe to API 5L ASTM A106 and ASTM A53 in A53B A106B and API 5L B X42 X46 X52 X60 and X65
- Casing to API 5CT GB/T 19830 and SY/T 6194 in H40 J55 K55 N80 L80 13Cr C90 T95 and P110
- Drill pipe to API SPEC 5DP and API SPEC 7 in G105 and S135 with NC38 and NC50 connections in R1 R2 and R3 lengths
- Documented mechanical and technical tests covering tensile yield elongation flattening bending impact hydrostatic and where applicable X-ray
- Coating specified for the service, from black paint and varnish through galvanizing fusion bond epoxy coal tar epoxy 3PE bitumen and polyurethane foam insulation
- EN 10204 certificate released with the shipment rather than promised afterwards
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SpecificationsTypical Applications
Where the Material Ends Up
Oil and Gas Transmission Lines
Seamless pipeline pipe from 21.3mm outside diameter upward carrying oil and natural gas, ordered in API 5L X grades with 3PE or fusion bond epoxy for buried service.
Large Diameter Trunk and Water Injection Lines
LSAW pipe from 355.6mm to 1820mm outside diameter with 5.0 to 50mm wall, and SSAW pipe from 219.1mm to 3048mm outside diameter with 4mm to 30mm wall for low pressure liquid and gas transport.
Well Casing Programs
Seamless casing to API 5CT for low and middle pressure fluid pipeline boiler petroleum and natural gas service and drilling, with black painting varnish hot galvanizing 3PE or epoxy coating.
Drilling Contractors and Rig Supply
Drill pipe in G105 and S135 with NC38 and NC50 connections supplied in R1 R2 and R3 ranges for fluid media transport on the rig.
Gathering Lines and Plant Piping
ERW pipe from 21.3mm to 660.4mm outside diameter with 1.5 to 22.2mm wall for low pressure water gas and oil transport around the facility and for oil drilling service.
Refinery and Process Stainless Piping
Stainless seamless pipe in TP304 TP316 TP316L and TP321 to ASTM A312 and EN10216-5 for petrochemical and water treatment duty where carbon steel corrodes.
How an Order Runs
From Enquiry To Delivered Material
Enquiry and Standard Confirmation
Send the standard and grade you are buying to, such as API 5L X52 PSL2 or API 5CT N80. We confirm what can be supplied seamless and what would be ERW LSAW or SSAW before any price is quoted.
Grade and Dimension Confirmation
Outside diameter wall thickness and schedule are fixed against your line list, from SCH5S through SCH160 and XS in the 1.65mm to 80mm wall range, together with length in fixed 5.8m 6m or 12m or 2-12m random.
Coating and End Preparation
Coating is selected with the service condition, and ends are confirmed as bevel above two inches or plain at or below two inches, with plastic caps or screwed and socket ends where you ask for them.
Production and Testing
Testing covers chemical component analysis, mechanical properties for ultimate tensile strength yield strength and elongation, technical properties including flattening bending blow and impact, exterior size inspection and hydrostatic test, with X-ray test on LSAW and SSAW pipe.
Certification
The certificate is issued to EN 10204 against the ordered standard. Company certifications on file are API 5L for line pipe together with ISO9001 BV SGS and RoHS.
Bundling and Export Packing
Pipe is bundled by size and grade with end caps fitted where specified, marked to match your line list and packed so the coating is not damaged in transit.
Loading and Shipment
Loading is arranged by container for smaller diameters and break bulk for large diameter LSAW and SSAW joints, with test reports and shipping documents released together.
Delivery Capability
What We Commit To on Shipment
- Bundles marked by grade size and heat so the welding crew can sort joints at the lay down yard
- End caps and coating protection fitted before loading to keep bevels and 3PE intact in transit
- Test reports and EN 10204 certificate released with the shipping documents
- Container loading for small diameter pipe and break bulk for large diameter LSAW and SSAW lengths
- Export shipments to Southeast Asia South America and Africa
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Read moreQuestions Buyers Ask
Oil Gas and Pipelines Steel Supply FAQ
Which API 5L grades can you supply for a transmission line?
Seamless line pipe is supplied in A53B A106B and API 5L B X42 X46 X52 X60 and X65, against API 5L ASTM A106 ASTM A53 DIN2448 and JIS G3452-54. Confirm the PSL level and design pressure with the enquiry so the grade is fixed before production.
What is the difference between your ERW LSAW and SSAW pipe for a pipeline?
ERW runs from 21.3mm to 660.4mm outside diameter with 1.5 to 22.2mm wall. LSAW runs from 355.6mm to 1820mm with 5.0 to 50mm wall. SSAW runs from 219.1mm to 3048mm with 4mm to 30mm wall and lengths from 3 to 70 M. LSAW and SSAW both carry an X-ray test in addition to the hydrostatic test.
Which casing grades do you stock and to what standard?
Seamless casing is supplied to API 5CT GB/T 19830 and SY/T 6194 in H40 J55 K55 N80 L80 13Cr C90 T95 and P110. State the string depth and connection so the grade and wall are matched to the program.
Can you supply drill pipe as well as line pipe and casing?
Yes. Drill pipe is supplied to API SPEC 5DP and API SPEC 7 in G105 or S135 with NC38 and NC50 connections, in R1 R2 and R3 ranges as well as 5.8M 6M 9M and 11.8M fixed lengths.
What coatings can you apply before shipment?
Surface treatment options are black painted natural galvanized varnish transparent oil anticorrosive 3PE coated epoxy coating fusion bond epoxy coal tar epoxy bitumen coating black oil coating and polyurethane foam insulation. Tell us the soil temperature and service and we will confirm which of those is normally used.
Do the test results come with the pipe or afterwards?
The test report and the EN 10204 certificate are released with the shipping documents. Ask for the mill test certificate and the hydrostatic and X-ray records together at order stage so nothing is outstanding when the pipe reaches the spread.
Sourcing Steel For Oil Gas and Pipelines
Line pipe to API 5L ASTM A106 and ASTM A53 in A53B A106B and API 5L B X42 X46 X52 X60 and X65 Send that with the sizes and quantity and we will confirm availability and what the certificate covers.