q235b carbon welded seamless ms spiral welded steel pipe

(1) raw materials are steel coil, wire and flux. Strict physical and chemical tests should be carried out before the input.
(2) the connection of steel head and tail is made of single wire or double wire submerged arc welding. After rolling into steel pipe, automatic submerged arc welding is applied.
(3) before forming, strip steel is leveled, trimming and planing, surface cleaning and transportation and bending edge treatment.
(4) the electric contact pressure gauge is used to control the pressure of the two sides of the conveyor under the pressure of the cylinder, so as to ensure the smooth conveying of the strip.
(5) use external or internal control roll forming.
(6) the weld gap control device is adopted to ensure that the weld gap meets the welding requirements, and the pipe diameter, the wrong side quantity and the weld clearance are strictly controlled.
(7) Lincoln welder is used for internal and external welding to carry out single wire or double wire submerged arc welding, so as to achieve stable welding specifications.
(8) the welded seam after welding is checked by online continuous ultrasonic automatic injury instrument, which ensures 100% of the spiral welded seam's NDT coverage. If defective, automatic alarm and spray mark, production workers adjust process parameters at any time, eliminate defects in time.
(9) use air plasma cutting machine to cut the steel pipe into single root.
(10) after cutting into single steel pipe, each steel pipe must be strictly first inspected, to check the mechanical properties of the weld, the chemical composition, the condition of dissolution, the quality of the surface of the steel tube and the inspection of nondestructive testing, so as to ensure that the production of the pipe is qualified.
(11) the spot on the welding seam with continuous sound wave flaw detection, after the manual ultrasonic and X ray examination, if the defect is true, after the repair, again after the nondestructive test, until the confirmation defect has been eliminated.
(12) all the butt welded joints of the strip and the joint of the butt joint with the spiral weld are all examined by X ray television or radiography.
(13) every steel pipe is hydrostatic pressure test, and the radial seal is adopted for the pressure. The test pressure and time are strictly controlled by the microcomputer inspection device for steel pipe water pressure. The test parameters are automatically printed and recorded.
(14) pipe end machining, so that the verticality of ends, slope angles and blunt edges can be accurately controlled.

Our company produce and export all kinds of carbon steel pipe fittings, Our city Cang Zhou city is the hometown of carbon steel pipe fittings. We have exported to many countries, such as, Russia, Egypt Malaysia, India, Turkey, Indonesia, Jordan etc.

Now every month, we export more than 50 containers' pipe fittings. According to client's requirement, we supply different quality fittings. And you also help our clients inspect the goods, dispatch the goods,and do clearance documents. So clients don't need to come to China for inspection and dispatch.

Besides,Our company is a manufacturer of pipe fitting machines, such as, hot forming elbow machine, cold forming elbow machine, long bend machine, cold forming tee machine, pipe expanding machine, marking machine, median frequency heating machine, reducer machine, cap machine, shot blasting machine, cutting machine, bevelling machine, hydraulic press, CNC lathe machine, drill machine, ring rolling machine.

We have focused on fitting machines more than 10 years. And we have exported to many countries, like Russia, Egypt,Malaysia, India, Turkey, Indonesia, ect. We have overseas office in Mumbai, India. Our marketing person and technician stay in abroad for 7-8 months each year for after sale service. Machine guarantee is one year. If our clients machine has problem, our after sale service person will come and help you solve the problem as quickly as possible.

We have one 11 professional technicians' team in overseas office for installation and after sale service (Five of them are more than 10 years technical experience. Three of them are more than 20 years technical experience).

To ensure the quality and stability of the machine, we use the most advanced production and testing equipment, including CO2 lasers meter, CNC grinding machines, scanning mirror, AC variable voltage power emulator stable, focus system. And we use the a thermostat measuring room, three-dimensional measuring instrument, laser dynamometers, digital bridge, and state-of-the-art equipment to check the quality and performance of our industrial laser equipment in each production step to ensure our laser cutting machine, laser engraving machine, laser marking machines and other equipment quality and stable performance.

We provide customers with affordable, high-quality machine. In order to achieve the advantages of Asia, the full benefit in terms of quality and cost, procurement of key components from Germany and the United States, and the production and manufacturing in China. We have the best supply chain in China and parts manufacturers, and a solid record of quality and innovation, to prove that our 17-year performance of the machine.

Quality product performance and good reputation, our products are not only successful sales in China, and have been exported to more than 120 countries and regions in the world, including: Germany, Japan, Italy, Russia, Japan, South Korea, Turkey, Brazil , India, the United Arab Emirates, Saudi Arabia and other countries, the products are subject to a great welcome and praise.

We deliver goods on time and safely