Product Introduction
X80 LSAW Steel Pipe is longitudinally submerged arc welding steel pipe, a kind of steel pipe used for oil and gas transportation. Submerged arc welding is a method in which the arc burns under the flux layer for welding. X80 LSAW steel pipe is produced by using a single medium-thick plate as raw material, pressing the steel plate in a mold or forming machine into a tube blank, using double-sided submerged arc welding and expanding the diameter.
Advantages
The weld of X80 LSAW Steel Pipe has good toughness, plasticity, uniformity and compactness. It has the advantages of large pipe diameter, pipe wall thickness, high pressure resistance, low temperature resistance and strong corrosion resistance. When constructing high-strength, high-quality long-distance oils and gas pipelines, most of the steel pipes required are LSAW pipes.
The manufacturing process of X80 LSAW steel pipes, from steel plate to finished pipe, is monitored at every step to ensure product quality.
Pretreatment: Steel plates undergo "controlled rolling and controlled cooling" plus offline tempering, with thicknesses ranging from approximately 6-40mm and widths matching the pipe circumference.
Forming Process: The forming process often determines the pipe's roundness and wall thickness uniformity, enabling it to be adapted to different diameters and wall thicknesses.
Key Forming Control Points: During the steel pipe forming process, the reduction per pass must be controlled to ≤3mm to avoid excessive deformation that can lead to work hardening of the steel plate. Hydraulic bulging is used during internal expansion to ensure the pipe's ovality is ≤0.8%.
Post-weld Heat Treatment: Heating to 600-650°C, holding time calculated based on wall thickness, followed by slow furnace cooling to 300°C and air cooling to eliminate ≥80% of weld residual stress.
Finished Product Inspection: Inspection of finished products is crucial in the production of X80 LSAW steel pipes. The pipes are cut to specified lengths, beveled at both ends, and undergo corrosion protection pretreatment on the exterior. Finished products undergo comprehensive verification, including nondestructive testing, hydrostatic testing, and mechanical testing.
Product Information
PRODUCTION CAPACITY | |
NAME OF PRODUCT: | LSAW STEEL PIPE |
STANDARD: API 5L PSL1& PSL2, API SPEC 2B , GB/T9711 ,ISO3183, EN10219, ASTM A672&A671&A691 | |
MATERIAL : The steel grade could be up tp max API 5L PSL2 X80N | |
PRODUCTION FACILITY 1 (INCLUDE LOCATION): | LSAW working flow located at main workshop of HAIQIANWEI ,OD range 457-1422mm, WT 8-50mm,150,000tons per year capacity.
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PRODUCTION FACILITY 2 (INCLUDE LOCATION): | FBE/3LPE coating working flow which is located at north workshop of HAQIANWEI , OD range 219-1620mm, WT 8-50mm,600,000m² |
The picture of pipes
INTERNATION PROJECT
Project:NZ National Convention Centre Project.
Material:C350L0
Year:2015
Two of the largest pieces of public art ever created in New Zealand will soon adorn the exterior of the New Zealand International Convention Centre (NZICC) under construction in central Auckland.
The works by two New Zealand artists, Sara Hughes and Peata Larkin, have been commissioned by SKYCITY Entertainment Group and will span a total of 5,760sqm once fully installed on the four external walls of the NZICC.
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