Straight Seam / Spiral Weld Pipe Mill Straight Seam Submerged Arc Welded Pipe Nondestructive Testing

The straight seam welded pipe production line produced by Duolek is a mature industrial pipe-making equipment. Relying on years of technological accumulation and process optimization, it has the advantages of stable and reliable performance.
High frequency straight seam welding pipe unit
This unit adopts an internationally advanced forming system and features a series of advantages such as stable forming, good surface quality of steel pipes, convenient specification modification, advanced technology, reliable equipment, perfect process and mature production.
Production material: The widest 1500mm strip is used as the production material, and the strip content is low.
Submerged arc straight seam welding pipe unit
The unit is a special equipment for the production of straight seam welded pipe in metallurgy, petroleum, construction and other industries. By adopting mature and reliable advanced processes and equipment, we ensure that the product quality, cost and various consumption indicators reach advanced levels, and have strong competitiveness in terms of quality and price.
Production material: The narrowest 1250mm production coil plate, medium plate, medium plate as the production material.
Forming process: JCOE cold stamping forming, which is characterized by the gradual formation of 50mm sheet metal.
Fastening method: Utilize the thermal shock along the line between the welding wire and the plate to fasten the filler.
Automatic steel pipe hydraulic testing machine
The Duolek fully automatic steel pipe hydraulic testing machine is the main inspection equipment for welded pipe production. It is controlled by PLC, and the working process of each part is automatically completed in sequence. It also has the function of automatically recording the test result parameters. The pipe diameter range is Φ20-Φ3500mm, and the test pressure is 10-110MPa.
The working process is as follows: feeding, clamping, water filling, pressure increase, pressure holding, pressure relief and discharging.
According to the sealing type, it can be divided into two types: radial sealing and end face sealing.
Automatic flat head chamfering machine
The chamfering machine is one of the auxiliary machines of the pipe welding unit, specifically designed for processing the bevels at the ends of steel pipes and flattening the ends of the steel pipes to facilitate on-site welding.
Steel pipe diameter: φ20mm-φ3500mm. Among them, the flat head chamfering machine with a diameter range of φ60mm-φ339.7mm is a high-speed flat head chamfering machine with a step feeding type, suitable for oil casing and ERW welded pipe manufacturing enterprises.
Ultrasonic flaw detector:
Defects active alarm and spray mark, workers adjust parameters according to this;
The parts with continuous acoustic detection marks on the weld are re-examined by manual ultrasonic and X-ray;
Defects are repaired and will be nondestructive inspected again until the defects are confirmed to be cleared;
X-ray
Duolek Heavy Industry's X-ray equipment can not only detect the invisible weld points of various welded pipes, but also intelligently analyze the inspection results, providing an effective inspection method for achieving the goals of "first-time pass rate" and "zero defects".

Scope of application:
Oil and gas: Oil and gas transmission pipelines used in high-pressure, corrosive environments.
Building structure: used for industrial and civil building support, bridges, high-speed guardrails, etc., relying on high strength and durability.
Urban infrastructure: used for the construction of urban water supply and drainage, sewage treatment systems.

▶ Size range divided by purpose

▶ Straight Seam Welded Pipe Unit Application Scope:

▶ Why choose us?

• Export Experience (Global Trade)

Since its establishment in 2002, Condor Heavy Industries has successfully operated its equipment in more than 20 countries and has dealers involved.According to Chinese export customs data, Duolek's related equipment ranks among the top ten in the industry, which means reliable quality and price.

• Customize on demand

With 21 years of manufacturing and export experience, Duolek supports the design and customization of equipment on demand, provides equipment configuration details and parameter guidance, and guarantees subsequent production quality and equipment adjustment. Here, you can get professional advice for your needs.

▶ Customer factory inspection communication:

▶ Our Clients Say

▶ Duolek Factory Common inquiry

Q:What information we need customers to provide?

A:Duolek has R&D Center to focus on the study for new product. We can design and make the change as customer’s requirements. We keep an opened mind to service our customers.

Q:What’s your quality control system?

A:We operate ISO9001 Quality Management System. We control our products quality by our workshop processes: Materials incoming inspection, Machining process control, finished testing and Inspection before packing. Each step has inspector and the testing results will be recorded for checking.

Q:What kind of payment terms do you accept?

A:We prefer T/T through bank. 30% when order is confirmed and 70% before shipment. L/C is also acceptable for amount over 200,000USD.

Q:What is your warranty policy?

A:All our products are warranted for one full year from date of delivery against defects in materials and workmanship.This warranty does not cover parts that are worn out through the course of normal operation

Shandong Duolek Heavy Machinery Co., LTD., located in Puji Industrial Park, Jiaozhou, Qingdao, Shandong Province. We are a large-scale heavy industry machinery manufacturing enterprise in China. The company is mainly engaged in the design, manufacturing, and installation of large-scale equipment such as heavy industry machinery, ring rolling machines, steel spiral welded pipe machines, mining machinery, etc. Its products cover multiple series such as self unloading, construction, sanitation, logistics, mining machinery, as well as key assembly components.

The company adheres to high-quality development, and after years of development and accumulation, through independent innovation and introduction of technology digestion, absorption, and re innovation, it has a deep technological foundation and strong development and manufacturing capabilities. The production workshop covers an area of over 20000 square meters. With advanced production lines, strong design, research and production capabilities, stable and high-quality products, and a comprehensive after-sales service system, Duolek Heavy Machinery Co., LTD. has won the market and gained recognition and praise from customers.

Taking technology as the guide and winning the market with quality is the unremitting pursuit of Duolek Heavy Industry.