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LSAW Steel Pipe
Used for low pressure liquid delivery, such as water, gas, and oil.
LSAW – UO(UOE),RB(RBE),JCO(JCOE)
DSAW -Double Submerged arc welded
API 5L, API 5CT, ASTM 53, EN10217, DIN 2458. IS 3589, GB/T3091, GB/T9711
API 5L PSL1 / PSL2, API 5CT
up to 12m
GR A, GR B, GR C,API 5L,ASTM A53
API 5L PSL1 / PSL2
GR B, X42, X46, X52, X56, X60, X65, X70, X80
GR A, GR B, GR C
S275, S275JR, S355JRH, S355J2H
Q195, Q215, Q235, Q345, L175, L210, L245, L320, L360- L555
Fusion bond Epoxy coating, Coal Tar Epoxy, 3PE, Vanish Coating, Bitumen Coating, Black Oil coating as per customer’s requirement
Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.
Volumes of spiral submerged arc (SSAW) is in the direction with the center line of the pipe forming forming Angle (adjustable), forming and welding, the welding seam into spiral, advantage is that it can produce various specifications of steel pipe diameter of the same specification, raw material range is larger, the weld can avoid the principal stress, the stress condition is good, the disadvantage is that poor geometry size, weld length compared with straight seam length,easy to produce cracks, porosity, slag, weld defects such as welding, welding stress is tensile stress state.The design code of the general long distance oil and gas pipeline stipulates that the spiral buried arc can only be used in 3 and 4 types of areas.After the improvement of this process, the raw material is changed to steel plate in foreign countries, so that the forming and welding are separated.After the pre-welding and refinement, the cold diameter expansion after welding, the welding quality is close to the UOE pipe.
Spiral Submerged-arc Welded Pipe(LSAW STEEL PIPE OR JCOE)
API 5L PSL1&PSL2
Transportation of oil and gas
For Structure (Piling)