Flanged Steel Pipe and Fittings

Flanged steel pipe is a pipe that butt welded with flanges at pipe ends. Flanged pipe is an important parts in rigid piping systems.

Flanged Pipe Fittings

Same as flanged steel pipe, flanged pipe fittings is the pipe fittings like elbow, tee, reducer ends welded with different type of flanges, like weld neck flange, flat flange, or slip on flange. Other than flanged pipe fittings, there are also other connection types like butt weld pipe fittings, socket weld pipe fittings.

Material types

Carbon flanged steel pipe: Material in carbon steel pipe in ASTM A53, A106, A333, API 5L, Flanged material in ASTM A105N, ASTM A350
Alloy flanged steel pipe: Alloy pipes in ASTM A335 P5, P9, P11, P22, P91 etc, flanged material in ASTM A182 F5, F9, F11, F22, F91
Stainless flanged steel pipe: Stainless pipes in ASTM A312, flanged material in 304/304L, 316/316L.


Water transporation system
Sewage disposal plants
Industrial Plants
Shipbuilding System
Pumping stations
Fire protection pipelines
Wastewater treatment plants

Flanged steel pipe is mainly installed above ground.
It is not good compatible with underground installation because of the rigidity of the joint. As the pressure bearing in underground structural, there are  unequal settlement or the stress will cause the deformation on the flanged connection which may break the pipeline.

Our Supply Range for Flanged Steel Pipe

Pipe Standard: ASTM A106, ASTM A333 Grade 6, ASTM A335, API 5L
Flange Material: ASTM A105N, ASTM A350 LF2, ASTM A182, F5, F9, F11, F22, F91
Flange Type: Weld Neck Flange, Slip On Flange, Flat Flange,
Pressure class: PN6 to PN60, Class 150#, 300#, 600#, 900#, to 2500#.
Manufacturing standard: ASME B16.5, ASME B16.47 A, B, EN 1092-1
Outer diameter: NPS 1/2”, 1”, 2”, 3”, 4”, 6”, 8”, 10”, 12” up to NPS 48 inch, 21.3 mm to 1219mm
Wall thickness: SCH 10, SCH 20, SCH STD, SCH 40, SCH 80, to SCH160, SCHXX; 1.24mm up to 1 inch, 25.4mm
Range of length: Single Random Length SGL, or Double Random Length. Fixed Length 6 meter or 12 meters.
Ends type: Plain end, Beveled, Threaded
Coating: Black paint, Varnished, Epoxy Coating, Polyethylene Coating, FBE, 3PE, CRA Clad and Lined, Fluoroplastic Lining

Manufacturing types:

Welded Flange Pipes - Flanges are welded to pipe ends. For carbon steel, alloy steel and stainless steel.
Cast Flange Pipes - These pipes are cast manufactured as a whole unit with the pipe.

astm a53 pipe

ASTM A53 pipe is carbon steel pipe in seamless, welded, and zinc-coated galvanized pipes. Dimensions ranges comply with AISI B36.10M from 1/2'' to 24''.

ASTM A53 Pipe

astm a106

ASTM A106 pipe (ASME SA 106 Pipe) is seamless carbon steel pipe widely used in different industries as fluid transmission, high temperature services.

ASTM A106 Pipe

api 5l pipe

API 5L Pipe is used for oil and gas pipeline transmissions. Material in Carbon Steel and covers Grade B, X42, X46, X52, X56, X60, X65, X70, PSL1 and PSL2.

API 5L Pipe