Seamless Steel Pipe/Tube (SMLS Pipe/Tube)， Seamless Precision Pipe， MS Large Diameter Seamless Pipe

Sizes:

Out diameter: 1/4"-36"

Wall thickness:1.25mm-50mm

Length:3m-12m

Types:

Hydraulic pipe, Boiler Tube, Fluid Pipe, Fire Pipe, Line Pipe, Structure Tube, Mechanical tube

Process:

Cold drawn tube

Hot rolled tube

Surface:

Black Seamless Pipe

Gi Seamless Pipe

Ends:

Black ends, Bevelled ends, Plain ends

Application:

Water underground / Sewage / Treatment Steel scaffolding / Transporting oil & gas / Boiler and condenser tubes / High-pressure applications / Chemical processing

Manufacturing Process:

Billets and coils are delivered to the pipe mill ready to be made into carbon steel pipe. Depending on the capabilities of the pipe mill and the end use of the final product, the casts will be formed into pipe by means of four distinct different manufacturing.Seamless carbon steel pipe has, as its name implies, no longitudinal weld seam. It is, in essence, one solid homogeneous piece of steel. A solid billet is simply heated and then stretched over a series of mandrels until the pipe has achieved its desired diameter and wall thickness.

Is seamless pipe stronger than welded pipe?
Seamless steel pipe has better pressure capacity, strength is higher than ERW welded steel pipe. So it is widely applied in high pressure equipment, and thermal, boiler industries. Generally the welding seam of the welded steel pipe is the weak point, the quality affect overall performance.

ASTM Standard for seamless steel pipe

Executive Standard	Grade / Material	Product Name
ASTM A53	A, B	Black and Hot-Dipped Zinc-Coated Steel Pipes Welded and Seamless
ASTM A106	A, B	Seamless Carbon Steel for High Temperature Service
ASTM A179	Low Carbon Steel	Seamless Cold-Drawn Low-Carbon Steel Heat Exchanger and Condenser Tubes
ASTM A192	Low Carbon Steel	Seamless Carbon Steel Boiler Tubes for High Pressure
ASTM A210	A1, C	Seamless Medium-Carbon and Alloy Steel Boiler and Superheater Tubes
ASTM A213	T5, T11, T12, T22 TP 347H	Seamless Ferritic and Austenitic Alloy Steel Boiler, Superheater and Heat-Exchanger Tubes
ASTM A312	TP304/304L, TP316/316L	Seamless Steel Pipe for Stainless Materials
ASTM A333	Gr.6	Seamless and Welded Steel Pipe for Low-Temperature Service
ASTM A335	P9, P11, P22	Seamless Ferritic Alloy Steel Pipe for High-Temperature Service
ASTM A519	4130,4140	Seamless Carbon and Alloy Steel for Mechanical Tubing
ASTM A789		Seamless Ferritic/Austenitic Stainless Steel Tubing for General Service

API Standard for seamless steel pipe

Executive Standard	Grade / Material	Product Name
API Spec 5CT	J55, K55, N80, L80,C90, C95, T95, P110, M65	Spectification for Casing and Tubing
API Spec 5L PSL1 / PSL2	A,B X42, X46, X52, X56, X60, X65,. X70	Specification for Line Pipe

DIN / EN Standard for seamless steel pipe

Executive Standard	Grade / Material	Product Name
DN 17175/EN10216-2	ST35, ST45, ST52, 13CrMo44	Seamless Steel Tube for Elevated Temperature
DIN 2391/EN10305-1	St35, St45, St52	Cold Drawn Seamless Precision Pipe
DIN 1629/EN10216-1	St37, St45, St52	Seamless Circular unalloyed Steel Tubes Subject to Special Requirments

Pipe Marking:

a. The seamless steel pipe marking shall include the following: manufacturer's name or trademark, product standard number, steel grade, seamless steel pipe specification and traceability identification number (heat number).
b. The marking can be done by jet printing, stamping, rolling, printing, pasting or sticking labels.
c. The marking is required to be eye-catching and clear, with firm handwriting and not easy to fade.