1. Introduction
Spiral welded pipe mill is used to roll the low carbon steel/ low alloy steel strip into tube by a certain forming angle, further weld it into steel pipe by sub-merged arc welder. Large diameter pipes can be produced with narrow steel strip.

2. usage of spiral welded pipe:
For liquid delivery: water supply& drainage
For gas delivery: coal gas, steam and LPG
For structural use: piling pipe, structural pipe in the field of bridge, dock, road, and construction, etc.

3.Technical process of the spiral welded pipe line:
feeding→uncoiling→leveling→shearing& butt welding→rotary shear→edge milling→main drive→pre-bend& guide board→forming→inside welding→outside welding→cutting off→pull out→end-facing& beveling→hydrotesting→collection


4. Machine parts in the working line
1)Uncoiler
2)Pinching & leveling machine
3)Manual/Electrical roll
4)End - Cutting & butt-welding machine
5)Rotary shear
6)Delivery machine
7)Guide board
8)Forming unit
9)Front bridge
10)Inside/outside welding device
11)Rear bridge
12)Flying saw cutter
13)Buried parts
14)Hydraulic system
15)Electric system
16)Inside/outside welder
17)Butt-weld car
18)Plasma cutter
19)Weld flux processing device
20)Beveling & end-facing machine
21)Hydraulic tester
22)Finishing equipment