What is the difference between longitudinal and spiral steel tubes

- Jan 29, 2019-

What is the difference between longitudinal and spiral steel tubes


There are many differences between  longitudinal  steel pipe and spiral steel pipe due to different production processes. The differences between longitudinal seam steel pipe and spiral steel pipe are discussed in detail below.The production process of longitudinal welded pipe is relatively simple. The main production processes include high-frequency welded longitudinal welded pipe and submerged arc welded longitudinal welded pipe. The longitudinal welded pipe has high production efficiency, low cost and rapid development.The strength of spiral welded pipe is generally higher than that of longitudinal welded pipe, and the main production process is submerged arc welding. Spiral steel pipe can produce welded pipe with different pipe diameters with billet of the same width, and can also produce welded pipe with larger pipe diameters with narrow billet.However, compared with longitudinal seam tubes of the same length, the weld length increases by 30-100%, and the production speed is lower.Therefore, the welding pipe with smaller diameter mostly adopts longitudinal seam welding, while the welding pipe with larger diameter mostly adopts spiral welding.They have been used in the industry production of longitudinal steel tube located at a t-shaped welding technology, the short sections of longitudinal seam steel pipe for docking, the length of the connect accords with the need of engineering, t the probability longitudinal seam welded steel defect is greatly improved, and the t-shaped seam welding residual stress is larger, the stress state of the weld metal are often in a three to increase the possibility of a crack.

Product Specification for Large Diameter Spiral Welded Steel Tube Longitudinal Submerged Arc LSAW Steel Pipe

Product Name
Large Diameter Spiral Welded Steel Tube Longitudinal Submerged Arc LSAW Steel Pipe
ExecutiveStandard
API 5L
Materials
PSL1—L245B/L290X42/L320X46/L360X52/L390X56/L415X60/L450X65/L485X70
PSL2—L245/L290/L320/L360/L390/L415/L450/L485 X42/X46/X52/X56/X60/X65/X70/X80
Size
Outer Diameter
Seamless:17-914mm 3/8"-36" 
LSAW 457-1422mm 18"-56"
Wall Thickness
2-60mm SCH10 SCH20 SCH30 STD SCH40 SCH60 XS SCH80
SCH100 SCH120 SCH140 SCH160 XXS
length
Single random length/Double random length
5m-14m,5.8m,6m,10m-12m,12m or as customer's actual request
Ends
Plain end/Beveled,protected by plastic caps on both ends, cut quare,grooved,threaded and coupling,etc.
Surface Treatment
Bare,Painting black,varnished,galvanized,anti-corrosion 3PE PP/EP/FBE coating
Technical Methods
Hot-rolled/Cold-drawn/Hot-expanded
Testing Methods
Pressure test,Flaw detection,Eddy current testing, Hydrostatic testing or Ultrasonic
examination and also with chemical and physical property inspection
Packaging
Small pipes in bundles with strong steel strips,large pieces in loose; Covered with plastic woven
bags; Wooden cases;Suitable for lifting operation;Loaded in 20ft 40ft or 45ft container or in bulk;
also accrdin to customer's requests
Origin
HUNAN Prov.China
Application
Conveying oil gas and water
Certificates
API ISO PED Lloyd's
Third Party Inspection
SGS BV MTC
Trade Terms
EXW FOB CIF CFR
Payment Terms
FOB 30%T/T,70% before shipment
CIF 30% pre-payment and the balance to be paid upon B/L (copy)
or Irrevocable 100% L/C at sight
MOQ
10 tons
Supply Capacity
5000 T/M
Delivery Time
Usually within 30-45 days after receipt of advance payment
Details Images
Pictures for Large Diameter Spiral Welded Steel Tube Longitudinal Submerged Arc LSAW Steel Pipe

Cangzhou Steel Pipe Group (CSPG)Co.,Ltd.

No.92 JieFang East Road ,Cangzhou City, Hebei,P.R.China.

 CSPG  has more than eighteen years history company which located in Lecong Iron and Steel World, a well-known steel distribution center in China, with superior geographical position and convenient water and land transportation. 


We are a direct-selling manufacturer specializing in the research and development of spiral steel pipes, steel spiral pipes, anti-corrosion steel pipes inside and outside. Since its inception, the company has been guided by a brand-new thinking of steel pipe product market based on the business philosophy of honesty, pragmatism and knowledge-seeking.