The steel pipe industry plays a critical role in energy transportation, municipal infrastructure, water conservancy projects, and industrial pipeline systems. It covers the manufacturing of seamless steel pipes, spiral welded pipes, large-diameter thick-walled pipes, oil and gas transmission pipelines, and municipal pipeline networks.
Modern pipeline engineering requires high-performance materials such as line pipe steel (X42–X70), high-strength steel, and corrosion-resistant steel. These materials demand precise forming control to ensure structural integrity, long service life, and safe operation under high pressure and harsh environments.
Key manufacturing challenges include poor flatness of raw steel plates, unstable rolling accuracy (roundness error ≤2 mm/m), and inconsistent weld quality during pipe forming. These issues directly affect pipeline strength, sealing performance, and operational safety in long-distance transportation systems.
EZHONG provides advanced plate rolling and leveling equipment designed to support high-precision pipe forming for large-diameter and heavy-wall steel pipes.
In steel pipe production, the Plate Rolling Machine is the core equipment used to form steel plates into cylindrical pipe shells for welding and assembly.
EZHONG heavy-duty rolling machines are widely used for:
Large-diameter spiral welded pipes
Long-distance oil and gas transmission pipelines
Thick-walled pressure steel pipes
Municipal and industrial pipeline systems
Steel pipe corridor structures
The equipment supports forming of Φ508–1422 mm (20"–56") large-diameter pipes, ensuring stable cylindrical accuracy and consistent welding preparation quality.
Pipeline manufacturing requires extremely stable forming performance due to strict requirements for roundness, weld alignment, and long-distance structural reliability.
EZHONG CNC plate rolling machines provide:
High-precision cylindrical forming with roundness error ≤ 2 mm/m
Stable processing of high-strength pipeline steel (X42–X70)
Efficient forming cycles for mass production (≤ 8 minutes per pipe section)
Support for 7–40 mm thick steel plates and 12-meter-wide plates
Integrated automation for continuous pipe production lines
These capabilities ensure that pipe shells meet strict structural and welding requirements for downstream SAW (Submerged Arc Welding) processes.
EZHONG 12-meter full hydraulic three-roll plate rolling machine is specifically designed for large-diameter welded pipe production lines and heavy pipeline manufacturing applications.
Key features:
Maximum rolling force: 1800T
CNC system: Siemens 8-axis control
Plate capacity: 7–40 mm thickness × 12000 mm width
Pipe diameter range: Φ508–1422 mm (20"–56")
High precision: roundness error ≤ 2 mm/m
Single pipe forming time: ≤ 8 minutes
This 3 roll plate rolling machine enables:
Continuous pipe forming production
Stable cylindrical accuracy
High-efficiency mass manufacturing
Compatibility with high-strength pipeline steels
Contact EZHONG to receive a customized technical proposal and equipment quotation.
EZHONG plate rolling machines are engineered for demanding pipeline production environments where precision and reliability are critical. Compared with conventional forming equipment, EZHONG systems provide:
Superior forming accuracy for large-diameter pipes
Stable performance for high-strength pipeline steel
Reduced deformation and improved weld quality
High efficiency for continuous production lines
Strong adaptability to oil & gas pipeline standards
These advantages make EZHONG equipment suitable for modern pipeline manufacturing systems requiring both productivity and safety assurance.
http://www.pipe-cn.com
Brief Introduction: Ningbo Sanding Steel Pipe Company is located in Ningbo Economic and Technological Development Zone, Zhejiang Province, China. It is a professional production enterprise engaged in super long and super large diameter welded steel pipe. Has 5000 tons of gantry file type self-provided wharf. The company takes large and medium diameter spiral seam buried arc welded steel pipe and straight seam pipe as the main products, and has the largest spiral welded pipe unit in China, which can realize mobile production. The annual production capacity is 200,000 tons, the pipe diameter is Ф 400~3050mm, and the wall thickness is δ 5~25mm.
Order EZHONG products:
EZW11XY-150*3500 three-roll plate rolling machine
(EZW11XY-150 * 3500, a three roller bending machine)
Main parameter table
order number | item | unit | data | |
1 | Machine specifications | mm | 150×3500（245Mpa） | |
2 | The upper roller diameter | mm | 1060 | |
3 | Lower roller diameter | mm | 860 | |
4 | Upper and lower roller material | 60CrMnMo 42CrMo | ||
5 | Straight edge coefficient | mm | 2～2.5times the plate thickness | |
6 | Circulating temperature | C | 20°C Cold roll | |
7 | Plate yield limit | MPa | 245 | 360 |
8 | The maximum width of the coil | mm | 3500 | 3500 |
9 | Minimum drum diameter at full load | mm | Φ3000mm | Φ3500mm |
10 | maximum thickness of bending plate | mm | 150 | 125 |
11 | Prebend plate thick | mm | 130 | 100 |
12 | Two lower roll center distance | mm | 1050～1750 | |
13 | Effective length of the working roller | mm | 3580 | |
14 | Upper roller drives the total torque | t.m | 120 | |
15 | Lower roller drive total torque | t.m | 2*3.5 | |
16 | Horizontal movement speed of the lower roller cylinder | mm/min | 350 | |
17 | Hydraulic system pressure and flow rate | Mpa | Motor~17, other up to 25 | |
18 | Pressure the cylinder diameter | mm | Ф870/Ф370/630 | |
19 | Total pressure under force | t | 2430 | |
20 | Horizontal push for cylinder diameter | mm | Ф480 | |
21 | horizontal thrust | ton | 900 | |
21 | upper roll speed | mm/min | 0～200 | |
23 | The power of the machine | Kw | ≈300 | |
24 | Horizontal movement of the lower roll on each side | mm | 0～650 | |
https://www.cssc.com.cn
Introduction: Jiangyou Great Wall Special Steel Co., LTD. (hereinafter referred to as: Great Wall Special Steel) is located in the hometown of —— Shixian Li Bai, Jiangyou City, Sichuan Province, with beautiful scenery, pleasant climate and convenient transportation. Founded in 1965, the company is a national special steel research and production base and a large backbone enterprise in Sichuan Province. It is an overall solution provider of high-end metal materials in China. It has an annual production capacity of 500,000 tons of special steel and 700,000 tons of special steel.Product coverage is wide, the company can be in accordance with the national standard, international standards and user technical conditions, provide carbon steel, steel, bearing steel, spring steel, mold steel, stainless steel, high strength steel, high temperature alloy, corrosion resistant alloy, precision alloy, titanium and titanium alloy and other 13 categories, more than 400 brand of special steel, special alloy and titanium products. The products are widely used in aviation, aerospace, Marine assembly, nuclear power, transportation, machinery, petrochemical and other fields, among which special alloy, special stainless steel, mold steel and other products occupy an important position in China, and the market share ranks among the best in the same industry.
Order EZHONG products:
EZW43BY-25*1500 11 rolls 1200mpa
（EZW43BY-25*1500 11 rolls 1200mpa）
Main parameter table
Serial number | Name | Model specification | ||||
1 | Straightening plate | Yield limit (MPa) | 900C (≤ 800C) | |||
Maximum thickness (mm) | 2-4 | 4. 6. | 6: 20 | 20: 25 | ||
Minimum thickness (mm) | 2mm | |||||
Maximum width (mm) | 1350mm | |||||
2 | Work roll | Roll distance (mm) | 250mm | |||
Roll diameter (mm) | 220mm | |||||
Roll length (mm) | 1450mm | |||||
Number of rolls | 11 (upper 5 and lower 6) | |||||
3 | Supporting roll | Roll distance (mm) | 250mm | |||
Roll diameter (mm) | 235mm | |||||
Number of columns | 3 | |||||
4 | Movable beam | Press-down stroke (mm) | + 100~-17mm | |||
Press-down speed (mm/min) | 25mm/min | |||||
Maximum swing | ±5mm | |||||
Lifting height | 130mm | |||||
5 | Correction speed (m/min) | 3: 20 frequency conversion is reversible, 10 at full load | ||||
6 | Correction accuracy (mm/ accuracy) | ≤ 10 | ≤ 5 | ≤ 3 | ≤ 10 | |
7 | Main motor power | 110KW × 2 | ||||
8 | Press-down motor power | 5.5KW × 2 | ||||
9 | Correct the relative elevation of the roll surface | 800mm | ||||
10 | The external dimensions of the mainframe (length × width × height) | ~ (7100 × 5562 × 5446) | ||||
