Second Hands Double Submerged Arc Welding Line

In recent years, send hands machine is more and more popular in the market, not only China market, but also in all over of words market, especially second hands steel pipe making production line.

Here are popular second hands steel pipe making production line as below.

ERW Pipe Machine(High Frequency Welding Machine)

SSAW Pipe Machine(Spiral Pipe Production Line)

LSAW Pipe Machine(Double Submerged Arc Welding Line)

Why most of customers prefer second hands steel pipe making production line?

Price: Cheaper, price discounts available
Time: Faster delivery, can be delivered immediately and start production promptly
Quality: Complete equipment for the second-hand pipe manufacturing line, with high efficiency in producing steel pipes
Risk: Low investment, does not occupy a large amount of funds
Market situation: In recent years, the market has fluctuated significantly, orders are unstable, and there is a reluctance to invest a large amount of funds in purchasing new equipment

According to industry data, the growth rate of the China second-hand steel pipe macking machine market from 2023 to 2025 exceeded 12%, and over 65% of newly established small and medium-sized pipeline customers prefer second-hand equipment to shorten the investment return cycle. Taking the mainstream 820 type spiral welding pipe equipment as an example, the price of a brand-new machine is approximately 300–500 million yuan. However, a second-hand unit with good condition and complete finishing lines (flat head machine, pipe end beveling machine, hydro test machine, and flaw detection) only costs 80–150 million yuan, equivalent to a 2–3 discount compared to purchasing units with the same production capacity.

"Save money, delivery quickly, and get more orders" are the main reasons to make the customers to choose second-hand equipment. Many customers have stated that the new pipe manufacturing equipment require 6-12 months from order placement to installation and commissioning, while second-hand equipment is usually available in stock. The dismantling, installation, and commissioning can be completed within 15-30 days, enabling a rapid connection with orders. In terms of the payback period, second-hand steel pipe machine have a more significant advantage: the 820 unit has a daily output of 150-200 tons, with a gross profit of 300-500 yuan per ton, and can recover the cost within 3-6 months, which is much faster than the 1.5-2-year return period of new machines.

Technical maturity is also a main reason. The spiral welded pipe and high-frequency welded pipe technologies have not undergone significant iterations during past 20 years. The performance of second-hand core components (frames, roller systems, welding machines) is stable. After refurbishment, the precision, roundness, and weld quality can reach over 90% of the new machines, fully meeting the standards of conventional projects such as pile foundations, water supply and drainage, and oil and gas transportation. In addition, second-hand equipment depreciates slowly and is easy to be resold. After 2 years of use, it can still be sold at 70%–80% of the original price, and the asset risk is much lower than that of new machines.

At present, the supply of second-hand steel pipe equipment is concentrated in traditional steel pipe production areas such as Tianjin, Hebei, Taiyuan in Shanxi Province, and Liaocheng in Shandong Province. The mainstream models include 820, 1020, 1620/1820 spiral units and 89, 114, 165 high-frequency welded pipe units. Complete sets of equipment with water pressure testing, non-destructive testing (UT/RT), and PLC electrical control are the most popular.

In second hands steel pipe production line, Double Submerged Arc Welding Line is the most popular, according to second hands equipment industry data shows, growth rate of Double Submerged Arc Welding Line is more than 12%, customer can recover the costs within 3-6 months, and at present, the production capacity of LSAW pipes exceeds 48 million tons one year, most of projects need main pipe diameters as 219-3620mm, wall thickness as 4.5-25mm.

There is one send hands Double Submerged Arc Welding Line is available in our Yashanway hands, now let us introduce this machine as below.

send hands Double Submerged Arc Welding Line

Q355B Grade

16"- 30mm
20"-30mm
26"- 35mm

1620mm with Max thickness 60mm

Other details please reft to last email as below:

3000T Pre-bending machine
8000T Forming machine
Gap forming machine
Internal & External welding machines
2000T Sizing machine

Total weight for this equipment is around 1800-2000tons

Send hands Double Submerged Arc Welding Line = Internal submerged arc welding machine + External submerged arc welding machine + Forming unit, specifically for manufacturing large-diameter, thick-walled, high-strength steel pipes (for foundation, water supply and drainage, oil and gas pipelines).
Features: Double-sided forming, double-sided submerged arc welding, one-time forming, high weld strength, high flaw detection pass rate.

What does a complete second-hand double-sided submerged arc welding equipment set include (please list clearly in the news)?

1. Loading & Pre-treatment Section

Uncoiler (hydraulic / mechanical)
Straightening Machine (multi-roller)
Alignment Device, Disc Shear, Edge Milling Machine (for double-sided bevels)
Plate Surface Cleaning Machine, Pre-bending Machine

2. Forming Section (Core)

Spiral Forming Machine (820/1020/1620/2020)
Front Swing / Rear Swing, Left / Right Forming
The frame is heavy and is not prone to deformation after being used for a long time

3. Double-sided Submerged Arc Welding System (Heart)

Internal Welding Machine (Submerged Arc): Weld the inner seam inside the pipe
External Welding Machine (Submerged Arc):龙门 / Suspension type welding the outer seam
Supplementary Components： Lincoln / Era MZ-630 power supply, slag recovery, welding wire reel
Features： Internal and External Welding synchronized, One-time Forming, 100% Weld Seam Fusion

4. Finishing & Inspection Section (Essential for Acceptance)

Shearing / Cutting Machine
Flat Head Beveling Machine
Hydraulic Testing Machine (10–25 MPa)
Non-destructive Testing (UT Ultrasonic / RT Radiographic)
Roundness Correction, Rust Removal, Oil Application