Welded Steel Pipe

Welded steel pipe detail

Shape:square,rectangular,round,shaped
Size:
φ：10.3-3620mm 
W.T.: 0.5-60mm for round steel pipe
O.D.:10×10-1200×1200mm 
W.T.:0.5-60mm for square carbon steel pipes
O.D.:10×15-800×1200mm W.T.:0.5-60mm for rectangular carbon steel pipes
For shaped tube, customize the outer diameter and wall thickness
Length:custmized
Grade：Gr.A/B/C,S235/275/355/420/460,A36,SS400,Q195/235/355,STKR400/490,300W/350W
Standard：ASTM A500/A501/A53/A106,EN10219/10210,JIS G3466,GB/T6728/3094/9711 AS1163, CSA G40.20/G40.21
Surface Treatment：Bare,oil,painted,galvanized,etc.
MOQ:2-5Tons
Capacity:10 million tons per year
Packaging:Oil coated and PVC cloth
Port of origin:Tianjin Port
Payment：TT/LC,etc

Welded Steel Pipes Benifit

The welding process for welded steel pipes utilises advanced technology and materials, resulting in high efficiency and low energy consumption. This leads to significant cost and energy savings compared to traditional pipes. Additionally, welded steel pipes can be customised in terms of specification and length, making them more convenient for transportation and installation.

Welded steel pipe has a thicker wall, providing higher strength and stiffness. This allows it to withstand greater pressure and impact. Additionally, due to its excellent mechanical properties, welded steel pipe is suitable for use in various complex terrains and environments, such as mountainous areas, rivers, and bridges.

Welded steel pipe has enhanced corrosion resistance. It can operate stably for extended periods in acidic, alkaline, salty, and other corrosive media, ensuring pipeline safety and longevity.

Welded Pipes For Water Supply

The integration of urban and rural water supply mainly refers to the extension of the water supply pipeline network from the city to the townships, the establishment of an integrated urban and rural water supply network system, and the basic realisation of urban and rural networked water supply and the sharing of water resources. 


Welded pipes play a very important role in the integration of urban and rural water supply.

Welded Pipes For structural use

Structural welded steel pipe is used in steel structure, bridge support, building structure pipe, pile foundation pipe, etc. As the structural pipe needs great pressure bearing and pressure resistance, it generally adopts the wall thickness more than 8mm.The main material of structural pipe is carbon steel.

Yuantai Derun welded pipe, sufficient stock, rich variety, complete specifications, free samples, complete materials, excellent quality，contact us now!

Welded Pipe for Oil Transportation

Pipelines are an important means of transporting oil. Oil transport, one of the components of fossil energy transport. Including crude oil transport and refined oil products transport two parts. 

As of 2018, the total length of oil and gas pipelines in the world exceeds 2.4 million km, of which more than 50% is in the United States and Russia. Welded pipe for oil transportation is an important pipe product for oil transportation.

If you have any welded pipe for oil,please contact us now,sales@ytdrgg.com.

Manufacturing Process

At present, carbon steel pipes can be divided into several categories according to the forming process, namely ERW steel pipes, LSAW steel pipes, SSAW steel pipes, and seamless steel pipes. Seamless steel pipes are further divided into hot extruded seamless steel pipes and cold drawn seamless steel pipes.
 
The main steps of the production process for ERW steel pipes are: uncoiling, straightening, forming, high-frequency resistance welding, removing welds, water cooling, sizing, cutting, testing, and warehousing.

The main steps in the production process of LSAW steel pipes are: steel plate inspection - trimming - pre bending - forging and cold forming - pre welding - internal and external welding - sizing - chamfering - UT inspection - water pressure inspection - appearance inspection - spray marking storage

The main steps in the production process of SSAW steel pipes are: uncoiling, cutting, butt welding, straightening, spiral forming, double-sided submerged arc welding, cutting, ultrasonic testing, water pressure testing, appearance testing, spray marking and storage.

Yuantai Derun Hot Dip Galvanised Welded Tube Manufacturing Process: Black Welded Tube → Alkali Washing →Water Washing →Pickling →Water Rinsing →Dipping Additives →Drying →Hot Dip Galvanising →External Blowing →Internal Blowing →Air Cooled →Water Cooled →Passivation →Water Rinsing →Inspection →Weighing →Storage.


① The main production processes (main inspection processes) of Pre galvanized welded steel pipes:

Galvanized steel coil→ uncoiling →Shear Butt Welding → straighten → Roll forming → High frequency welding→ weld seam removal → sizing →cutting→ inspection (non-destructive, physical and chemical, bench inspection) → storage


② The main production processes of Zinc-aluminium-magnesium coated steel tubes

Zinc-aluminium-magnesium coated steel coil → uncoiling →Shear Butt Welding → straighten → Roll forming → High frequency welding→ weld seam removal → sizing →cutting→ inspection (non-destructive, physical and chemical, bench inspection) → storage