API 5L welded pipes are mainly divided into two types: long welded pipes and spiral welded pipes. Both types of pipes are welded steel pipes used to transport fluids such as oil and natural gas.

 

API 5L welded pipe is indeed an important pipe for the transportation of oil, natural gas and other liquids or gases.

API 5L Grade B steel pipe This is a grade in the API 5L standard. It is usually manufactured using the submerged arc welding (LSAW) process. This process uses long bead arc welding that runs along the length of the pipe. Grade B carbon steel pipe has high strength and good corrosion resistance, making it suitable for a variety of oil and gas applications.

 

API 5L X42, X52 Steel Pipe These are another grade in the API 5L standard and are usually manufactured using the Spiral Submerged Arc Welding (SSAW) process. This process is to roll the steel plate into a tube shape and perform spiral submerged arc welding. The weld is spiral-shaped and follows the spiral direction of the pipe. X42 and X52 pipes are available in different strengths and chemical compositions and are suitable for different temperature and pressure conditions.

 

 

API 5L Welded Pipe Specification	API 5L
API 5L Welded Pipe Grades	API 5L Grade B PSL1, PSL 2 / API 5L X42 PSL1, PSL 2 / API 5L X46 PSL1, PSL 2 / API 5L X52 PSL1, PSL 2 / API 5L X56 PSL1, PSL 2 / API 5L X60 PSL1, PSL 2 / API 5L X65 PSL1, PSL 2 / X70 PSL1, PSL 2 / API 5L X70 PSL1 / PSL2 / API 5L X80 PSL1, PSL 2 / ISO 3183 L245 PSL1, PSL 2, ISO 3183 L290,
API 5L Welded Pipe Type	LSAW Pipes (Longitudinal Submerged Arc Welded Pipes ) HSAW Pipes (Helical Submerged Arc Welded Pipes ) DSAW Pipes (Double Submerged Arc Welded Pipes ) HSAW Pipes (Helical Submerged Arc Welded Pipes ) SSAW Pipes (Spiral Submerged Arc Welded Pipes )
API 5L Welded Pipe Outer Diameter Size	12" NB to 150" NB (Nominal Bore Size)
API 5L Welded Pipe Wall Thickness	Schedule 20 to Schedule XXS (Heavier On Request) Up to 250 mm Thickness
API 5L Welded Pipe Length	5 to 7 Meters, 09 to 13 Meters, Single Random Length, Double Random Length And Customize Size.
API 5L Welded Pipe Coating	Epoxy Coating / Colour Paint Coating / 3LPE Coating.
API 5L Welded Pipe Value Added Services	Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Galavanizing / Heat Treatment
API 5L Welded Pipe Packaging	Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector
API 5L Welded Pipe Shipment & Transportation	By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet

 

 

 

Permissible Variations for Welded API 5L steel Pipe

Â	Grade A, B, A25	X42 through X80
NPS 2-1/2 and smaller --Seamless and Welded, %	+20 -- 12.5	+15 -- 12.5
NPS 3 --Seamless and Welded, %	+18 -- 12.5	+15 -- 12.5
NPS 4 through 18 --Seamless and Welded, %	+15 -- 12.5	+15 -- 12.5
NPS 20 and larger -- Welded, %	+17.5 -- 10.0	+19.5 -- 8.0
NPS 20 and larger -- Seamless, %	+15.0 -- 12.5	+17.5 -- 10.0

 

The inspection and testing of API welded pipes include appearance quality, dimensional accuracy, mechanical properties and non-destructive testing.The welds should be smooth and free of defects such as welding slag, cracks, and incomplete penetration. Check whether the length, outer diameter, curvature and other dimensions of the welded pipe meet the requirements. Conduct tensile, bending, impact and other tests to detect the strength, toughness and other mechanical properties of the welded pipe. Use ultrasonic, ray and other methods to conduct non-destructive testing of welds to check whether there are cracks, pores and other defects inside the welds.

 

 

 

 

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