Advanced Anti-Corrosion Spiral Pipes

our company has only one Ф4020 spiral pipe production line in Tianjin. The products mainlyinclude national standard spiral welded steel pipes, plastic-coated steel pipes for watelsupply and drainage, plastic-coated steel pipes for coal mines, plastic-coated steel pipes forfire water, threading pipes for natural gas transmission, power cables, etc.), and theproduction types of anti-corrosion steel pipes include (3PP/3PE/2FBE anti-corrosion steepipes, TPEP anti-corrosion steel pipes, internal and external FBE anti-corrosion steel pipesinner EP and outer PE plastic-coated steel pipes) lined with stainless steel composite steepipes, plastic-lined steel pipes and various supporting pipe fittings.

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.

Our company has strong experimental technical force and perfect testing equipment, and in 2022, it passed the national high-tech enterprise certification, and passed the product quality inspection of the national testing center, established a perfect quality management

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!

Spiral welded steel pipe unit

Our company is now invested in the spiral welding steel pipe 820-4020 unit, using double-sided double-wire submerged arc automatic welding, with an annual output of 200,000 tons, as the most advanced spiral welded pipe production equipment at home and abroad, from feeding and leveling to milling and forming welding as a whole, strictly control the quality of each spiral welded steel pipe produced by our company. The products are widely used in petroleum, gas, natural gas, water supply, thermal power generation, sewage discharge and other industries.

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

Flat head chamfering machine

Flat-head chamfering machine is a pipe end processing equipment specially designed for the national standard spiral welded pipe production line. The equipment uses servo motor to drive the ball screw feed, which has the characteristics of easy operation and stable cutting. According to customer needs, the groove angle is polished to facilitate welding.

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

Hydrostatic testing machine

This hydraulic press is a steel pipe pressure testing equipment specially designed for the spiral welded pipe production line. It is suitable for the hydrostatic test of steel pipes for pipeline transmission systems in the oil and gas industry according to GB/T9711-2018 standards. It has the characteristics of easy operation.

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.

Spiral welded pipe mobile X-ray flaw detector

The quality control of spiral welded pipes is very important in the production of products, and afteryears of unremitting efforts, a series of efficient quality control solutions for different longitudinalseam and spiral welded pipe products have been summarized. Among them, the 225kv seriesdetection system is a real-time imaging detection system specially designed for the quality controlof the production process of special pipe fittings. Intuitive real-time inspection of defects in weldmanufacturing, such as cracks, porosity, slag inclusions, etc.

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

Outer 3PE anti-corrosion unit

1. The powder supply center integrates several functions of fluidization, powder supply, powder return, vibrating screen and spray gun cleaning, which occupies less space, less environmental pollution, and is convenient to operate.

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.

Curing water-cooled room

The water is pumped from the reservoir through a high-pressure water pump, and then dispersed to each water nozzle through the water pipe, which can not only achieve a large water flow rate, fast curing, but also not easy to form water droplets on the surface of the anti-corrosion coating. The surface coating of the produced anti-corrosion steel pipe is quickly cured and the anti-corrosion coating is quickly formed.

Internal FBE anti-corrosion steel pipe

Inner wall epoxy coating features: - Chemically resistant. - It is suitable for transporting corrosive media (such as acid, alkali, salt, oil and gas, chemical rawmaterials, etc.) to prevent the inner wall of the pipeline from being corroded. - Commonly found in oil, gas, chemical, sewage treatment and other industries. - Epoxy coating has a smooth surface, which reduces fluid friction, improves conveying efficiency andsaves energy. (Reduced fluid resistance)

- 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)

External 3PE/3PP anti-corrosion steel pipe

Characteristics of the outer three layers of polyethylene/polypropylene anticorrosive layer: - 3PE consists of three parts: epoxy base powder (FBE), adhesive middle layer, and polyethylene (PE/PP) outer layer.

- 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.

TPEP anti-corrosion steel pipe

Combined application of inner wall epoxy coating and outer three layers of polyethyleneanticorrosive layer:

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."

Post time: Oct-11-2025

Tianjin Yuantai anti-corrosion and thermal insulation metal spiral steel pipe