SSAW steel pipe for steel casing is a spiral seam steel pipe made of strip steel coil as raw material, extruded at room temperature, and welded by automatic double-wire double-sided submerged arc welding process. The spiral steel pipe sends the strip steel into the welding pipe unit, and after multiple roller rolling, the strip steel gradually rolls up to form a round tube blank with an open gap. The pressing amount of the extrusion roller is adjusted to control the weld gap to 1~3mm, and the two ends of the weld are flush.
Characteristics of SSAW steel pipe specifications
Spiral steel pipe has a simple production process, high production efficiency, low cost and rapid development. The strength of spiral welded pipe is generally higher than that of straight seam welded pipe. It can produce welded pipes with larger diameters with narrower billets, and can also produce welded pipes with different diameters with billets of the same width. The strength of spiral welded pipe is generally higher than that of straight seam welded pipe. It can produce welded pipes with larger diameters with narrower billets, and can also produce welded pipes with different diameters with billets of the same width. However, compared with straight seam pipes of the same length, the weld length increases by 30~100%, and the production speed is lower. Therefore, smaller diameter welded pipes are mostly welded by straight seam welding, while large diameter welded pipes are mostly welded by spiral welding.
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Name
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Spiral Steel Pipe
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Application
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Fluid Pipe, Boiler Pipe, Drill Pipe, Hydraulic Pipe, Gas Pipe, OIL PIPE, Chemical Fertilizer Pipe, Structure Pipe
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End protector:
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Plastic Pipe Cap
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Section Shape
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Round
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Special Pipe
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API Pipe, Other, EMT Pipe, Thick Wall Pipe
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Outer diameter
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1/2-24inch,20-610mm,DN15-DN600
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Wall thickness
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8-30 mm
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Length
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5.8m,6m,11.8m,12m or as required
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Surface
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Black paint, varnish, oil, galvanized, protective coatings,PE/3PE
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End
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Shape:Under 2 inch plain ends;above 2 inch beveled ends,
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Protector:1. Plastic caps (small OD) 2. Iron protector (large OD)
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Test
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Chemical Component Analysis,Mechanical Preperties,Technical Properties,Exterior Size Inspedtion,Hydro static test,X-ray Test
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Certificate
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API, ASTM, CE, ISO, BS
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Package
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Loose package, bundled pipes with two slings at the both end for easy loading and discharging, End with Plastic caps.
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Application
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Transport oil, gas and other fluid objects , variety of structural parts, oil drilling , machinery manufacturing, etc
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Advantage
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1.Reasonable price with excellent quality2.Abundant stock and prompt delivery
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3.Rich supply and export experience, sincere service
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4.Reliable forwarder, 2-hour away from port
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Tolerance of Outside Diameter and Wall Thickness of SSAW Steel Pipe
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Standard
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Tolerance of Pipe Body
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Tolerance of Pipe End
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Tolerance of Wall Thickness
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Out Diameter
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Tolerance
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Out Diameter
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Tolerance
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GB/T3091
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OD≤48.3mm
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≤±0.5
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OD≤48.3mm
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–
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≤±10%
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48.3 ≤219mm
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≤±1.0%
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48.3
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–
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≤273.1mm
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219 ≤508mm
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≤±0.75%
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219
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-0.8～+2.4
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≤508mm
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OD>508mm
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≤±1.0%
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OD>508mm
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-0.8～+3.2
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GB/T9711.1
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OD≤48.3mm
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-0.79～+0.41
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–
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–
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OD≤73
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-12.5%～+20%
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60.3 ≤457mm
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≤±0.75%
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OD≤219mm
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-0.4～+1.59
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88.9≤OD≤457
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-12.5%～+15%
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508 ≤941mm
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≤±1.0%
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OD≥323.9
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-0.79～+2.38
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OD≥508
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-10.0%～+17.5%
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OD>941mm
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≤±1.0%
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–
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–
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–
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–
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GB/T9711.2
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60 ≤610mm
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±0.75%D～±3mm
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60 ≤610mm
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±0.5%D～±1.6mm
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4mm
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±12.5%T～±15.0%T
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610 ≤1430mm
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±0.5%D～±4mm
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610 ≤1430mm
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±0.5%D～±1.6mm
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WT≥25mm
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-3.00mm～+3.75mm
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OD>1430mm
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–
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OD>1430mm
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–
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–
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-10.0%～+17.5%
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SY/T5037
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OD<508mm
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≤±0.75%
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OD<508mm
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≤±0.75%
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OD<508mm
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≤±12.5%
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OD≥508mm
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≤±1.00%
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OD≥508mm
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≤±0.50%
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OD≥508mm
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≤±10.0%
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API 5L PSL1/PSL2
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OD<60.3
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-0.8mm～+0.4mm
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OD≤168.3
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-0.4mm～+1.6mm
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WT≤5.0
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≤±0.5
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60.3≤OD≤168.3
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≤±0.75%
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168.3 ≤610
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≤±1.6mm
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5
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≤±0.1T
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168.3 ≤610
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≤±0.75%
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610 ≤1422
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≤±1.6mm
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T≥15.0
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≤±1.5
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610 ≤1422
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≤±4.0mm
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OD>1422
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–
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–
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–
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OD>1422
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–
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–
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–
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–
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–
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API 5CT
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OD<114.3
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≤±0.79mm
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OD<114.3
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≤±0.79mm
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≤-12.5%
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OD≥114.3
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-0.5%～1.0%
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OD≥114.3
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-0.5%～1.0%
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≤-12.5%
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ASTM A53
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≤±1.0%
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≤±1.0%
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≤-12.5%
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ASTM A252
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≤±1.0%
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≤±1.0%
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≤-12.5%
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Standard and Classfication
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Classfication
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Standard
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Main Products
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Steel Pipe for Fluid Service
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GB/T 14291
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Welded pipe for mine fluid sevice
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GB/T 3091
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Welded pipe for low pressure fluid service
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SY/T 5037
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Spirally submerged arc welded steel pipe for pipelines for low pressure fluid service
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ASTM A53
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Black and hot-hipped galvanized welded and seamless steel pipe
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BS EN10217-2
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Welded steel tybes for pressure purposes – delivery technical conditions – part2: Electric welded non- alloy and alloy steel tubes with specified elevated temperature properties
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BS EN10217-5
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Welded steel tybes for pressure purposes – delivery technical conditions – part5: submerged arc welded non-alloy and alloy steel tubes with specified elevated temperature properties
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Steel Pipe for Ordinary Structure
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GB/T 13793
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Longitudinally electric resistance welded steel pipe
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SY/T 5040
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Spirally submerged arc welded steel pipe piles
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ASTM A252
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Welded and seamless steel pipe piles
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BS EN10219-1
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Cold formed welded structural hollow sections of non-alloy and fine grain steels – part1: Technical delivert conditions
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BS EN10219-2
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Cold formed welded structural hollow sections of non-alloy and fine grain steels – part2: tolerances dimmsions and sectional properties
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Line Pipe
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GB/T 9711.1
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Steel pipe for pipeline transportation system of petroleum and natural gas industries(Class A steel pipe)
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GB/T 9711.2
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Steel pipe for pipeline transportation system of petroleum and natural gas industries(Class B steel pipe)
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API 5L PSL1/2
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Line pipe
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Casing
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API 5CT
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Steel pipe for use as casing or tubing for wells of petroleum and natural gas industries
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Steel Grade:
EN: S235JR,S235J0, S235J2, S275JR,S275J0, S355JR, S355J0,S355J2H,S460,S690,
DIN: St12, St13, St14, St33, St37, St44, ST52
ASTM A 53: Gr. A, Gr B, Gr C, Gr.D
API 5L: A, B, X42, X46, X52, X56, X60, X65 X70
GB/T9711: L175, L210, L245, L290, L320, L360, L290, L320, L360, L390, L415, L450, L485, L555
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