We have the mostadvanced production facilities for the production and manufacturing of anti-corrosion steelpipes and spiral pipes, as well as a domestic first-class production team and efficient quality in spection and loading services.

system, and successively passed the ISO9001-2015 quality management system certification, ISO14001:2015 environmental management system certification, ISO:45001:2018 occupational health and safety management system certification, and successively obtained the special equipment production license special equipment, (Pressure piping and components) manufacturing type test certificate, APIQ1, API5L, Tianjin related to drinking water health and safety products health license approval. In the company's operation and product manufacturing process, the relevant management system

operation requirements are strictly implemented, and the efficient operation of each system within the company is effectively guaranteed, and the implementation standards are mainly in accordance with GB/T9711, GB/T3091, GB/T23257, CJ/T120, GB/T28897, AWWA C213, AWWA C210, GB/T5135.20 (fire hose), DIN30670, DIN30678, and CSA Z245.20, CSA Z245.21, EN10288, SY/T0413, SY/T0315, IPE8710 product quality is the foundation laid for the survival and development of enterprises, and the quality inspection equipment of each production process of our company is complete. Our company is equipped with advanced testing equipment such as electric spark detector, flattening bending testing machine, electronic universal testing machine, indentation hardness tester, impact strength testing

machine, peel strength tester and so on for strict quality control. To this end, a professional physical and chemical experiment center has been set up, and it is equipped with professional test and technical personnel to realize the whole process supervision and inspection from raw materials to finished anti-corrosion steel pipes, so as to ensure that the pass rate of products is as high as 100%. Our company has always adhered to the concept of honest management, "100 years of Yuantai, Derun people's hearts", to scale and efficiency, to quality and survival. Always adhere to the customer's needs and satisfaction as the core. Dedicated to the majority of new and old customers to create the best quality products, to provide the most thoughtful service, hope to work with customers hand in hand, mutual benefit, win-win development!

Production process: winding → cone clamping → shovel dismantling → pinch leveling → electric

vertical roll alignment → shearing butt welding machine head and tail → electric vertical roll

alignment → edge milling machine milling bevel → strip surface cleaning → manual vertical roll

alignment → conveyor feeding → guide plate feeding → forming vertical roll positioning → forming

machine coil forming → internal weld welding → outer weld welding → cut-to-length pipe cutting → pipe dropping

Production process: pipe inlet → roller rises and aligns in place → the left and right machine headsadvance into place → clamp the steel pipe → the main motor starts → fast forward into place → workers into the cutting → after cutting and quickly receives into place → clamps open → left andright machine head rewinds into place→ idler lowers the steel pipe and puts the steel pipe on thebench → the pipe puller pulls out the cut steel pipe → the pipe puller resets the pipe and lifts the →next steel pipe at the same time

Production process: pipe inlet → roller rises and aligns in place → the machine head advances

into place → clamps the steel pipe → the main motor starts → fast forward into place → cuts → quick back into place after cutting→ clamps open → left and right machine head fast rewinds into place→ roller descends to put the steel pipe on the bench → pipe puller pulls out the cut steel pipe → the pipe puller resets the pipe and lifts the → next steel pipe at the same time.

Operation process: The high-voltage generator is controlled by the control console to generate30-225KV DC high voltage and AC filament voltage, which is transmitted to the X-ray tube(1-3.5mA when using a small focus, 1-8mA when using a large focus) through a high-voltagecable, and the electronically bombardment of the anode tungsten target generates X-rays torealize the steel tube inspection

2. The barrel has been the continuation of the American Barton technology, forced extrusion structure, unique rifling design, with high-efficiency screw can be efficiently extruded. On the basis of Japanese technology, the screw absorbs the German Reifenhauser technology and has been improved many times, with special special, double-wave high-efficiency mixing type, excellent plasticizing effect, large extrusion capacity, stable extrusion, and excellent mixing effect, which is more suitable for the mixing and extrusion of various materials.

3. The barrel and screw are made of 38CrMoAIA high-quality alloy steel produced by well-known domestic special steel plants, normalizing, annealing, quenching and tempering, and adding our company's unique grooving and welding cemented carbide and other heat treatment processes, all CNC machine tool processing, nitriding hardness up to HV950-1100, the whole production process and quality are carried out within a controlled range, so as to effectively avoid the problem of poor processing and quality control.

- Prevents limescale and sediment from adhesion, prolongs pipe cleaning intervals, and reducesmaintenance costs. - Oil/gas pipelines, drinking water pipelines, chemical medium pipelines, etc. (Mainly used for)

- The polyethylene outer layer is impact- and scratch-resistant, making it suitable for pipes in buried, subsea or harsh environments.

- Epoxy primer provides chemical bonding and cathodic protection, the middle layer enhances adhesion, and the PE layer insulates moisture and soil erosion.

- Suitable for pipelines that require electrically insulated protection (e.g. cathodic protection systems for oil pipelines).

- Long-distance oil/gas pipelines, urban underground pipe networks, marine pipelines, high-saline soil environments, etc.

Oil & Gas Transmission

- The inner epoxy is resistant to medium corrosion, and the outer 3PE is resistant to soil, moistureand mechanical damage to ensure the safety of long-distance pipelines. Urban water/heat - The inner wall is rust-proof, anti-corrosion, hygienic and non-toxic (in line with drinking waterstandards), and the polyethylene layer on the outer wall resists underground corrosion. Chemical industry

- When transporting corrosive liquids such as acids and alkalis, double protection extends the lifeof the pipeline. Marine Engineering

- Submarine pipelines resist seawater corrosion, salinity and mechanical impact, and thecombination of internal and external anti-corrosion is remarkable.

Advantages of using internal epoxy and external 3PE anti-corrosion steel pipes:

Long-term anti-corrosion: double protection makes the life of the pipeline up to 30~50 years. Economical: Reduces the risk of leakage and repair costs. Adaptability: suitable for extreme environments such as high temperature, low temperature, high

pressure, and high corrosiveness. "The combination of inner epoxy and outer 3PE is the "gold standard" for pipeline corrosion

protection, especially in scenarios where safety and durability are required. Through internal

anti-medium corrosion and external anti-environmental erosion, the comprehensive performance

of pipelines is significantly improved, and it is widely used in core fields such as energy, municipal, and chemical industry."