Welded Pipes: Top Choice in Selangor, KL, Malaysia, Shanxi Province, China Arrow Anbao Forging Sdn Bhd

Description

Pipe Types Explained

The oil and gas industry uses three main steel pipe types: Seamless, ERW (Electric Resistance Welded), and LSAW (Longitudinal Submerged Arc Welded).

Seamless pipes are made from solid steel billets that are heated and pushed or pulled over a form to create a hollow tube without any welded seams.

They are commonly used for high-pressure applications in upstream operations like drilling and exploration, midstream fluid transmission, downstream refining, and utility services.
ERW pipes are made using cold-forming, shaping steel coils into cylindrical forms, and the seam is welded together using an electric current.

The weld seam runs along the length of the pipe. ERW pipes are cost-effective for low-to-medium-pressure applications, such as transporting water, oil, and gas.
LSAW pipes are made by bending and welding steel plates along the length, with the seam running straight (longitudinal seam) or in a spiral.

They are used for large-diameter pipes (16-60 inches) in critical applications, such as long-distance oil and gas pipelines crossing through cities or underwater.

The table below summarizes the key differences between these pipe types and their typical applications in the oil and gas industry:

Pipe Type	Manufacturing	Pressure Rating	Typical Applications
Seamless	No weld seam	High	Upstream, midstream, downstream
ERW	One straight seam	Low-medium	Water, oil & gas transport
LSAW	1-2 straight or spiral seams	Low-medium	Water, oil & gas transport

Welded Line Pipe
Thickness	1/8" (6mm), 1/4" (8mm), 3/8" (10mm), 1/2" (15mm), 3/4" (20mm), 1" (25mm), 1-1/4" (32mm), 1-1/2" (40mm), 2" (50mm), 2-1/2" (65mm), 3" (80mm), 3-1/2" (90mm), 4" (100mm), 5" (125mm), 6" (150mm), 8" (200mm)
Standard	API 5L, ASME/ANSI B36.10
NDT	API 5L Annex E (as per client requirement)
Heat Treatment	As per request
Coating	Internal and external coating available as per request

Size Range
ERW	2" (50mm), 2-1/2" (65mm), 3" (80mm), 3-1/2" (90mm), 4" (100mm), 5" (125mm), 6" (150mm), 8" (200mm), 10" (250mm), 12" (300mm), 14" (350mm), 16" (400mm), 18" (450mm)
LSAW	16" (400mm), 18" (450mm), 20" (500mm), 22" (550mm), 24" (600mm), 26" (650mm), 28 (700mm)", 30" (750mm), 32" (800mm), 34" (850mm), 36" (900mm), 38" (950mm), 40" (1000mm), 42" (1050mm), 44" (1100mm), 46" (1150mm), 48" (1200mm), 50" (1250mm), 52" (1300mm), 54" (1350mm), 56" (1400mm), 58" (1450mm), 60" (1500mm)