Low carbon steel pipe is plastic material. The stress-strain curve in the tensile process is divided into four stages: Elastic stage, yield stage, strengthening stage, local deformation stage. In the local deformation stage there are obvious yield and necking phenomenon. At the beginning of the elastic phase, fully comply with Hooke's law along the straight line, after the proportion of speed limit to accelerate, but no obvious yield stage.

Steel Pipeline pickling methods can be divided into groove type pickling and circulating acid, the cycle can be divided into online circulation pickling and pickling line the outer loop.

ERW pipe's application includes three aspects, first, for low pressure fluid transmission, such as water pipelines, agriculture & irrigation (water mains, sewerage systems, industrial water lines,; ant piping, deep tube-wells & casing); second, for machinery manufacturing, such as engineering purpose, fencing, scaffolding, line pipes etc .; third, for Gas pipe lines (pipe lines for natural gas), LPG and other non-toxic gas.

1. Chemical composition analysis: chemical analysis, instrumental analysis (infrared C-S instrument, direct reading spectrometer, zcP, etc.). ① infrared C-S instrument: analysis of ferroalloy, steelmaking raw materials, steel in the C, S elements. Direct Reading Spectrometer: C, Si, Mn, P, S, Cr, Mo, Ni, Cn, Al, W, V, Ti, B, Nb, As, Sn, Sb, Pb,

① hot-rolled seamless steel pipe main production process (△ main inspection process): Tube preparation and inspection △ → Tube heating → Perforation → Tube rolling → Steel tube reheating → Setting (minus) diameter → Heat treatment △ → Finishing tube straightening → Finishing → Inspection △ (Non-destructive, physical and chemical, bench inspection) → Storage ② cold-rolled (pull) seamless steel pipe main production processes: Blank preparation → pickling lubrication → cold rolling (pulling) → heat treatment → straightening → finishing → inspection

Seamless steel tube is very versatile. The general purpose seamless steel pipe is made of common carbon structural steel, low alloy structural steel or alloy structural steel with the most output, mainly used as the pipe or structural part for transporting fluid. .2, according to the use of different sub-three types of supply: a, according to the chemical composition and mechanical properties of supply; b, according to the mechanical properties of supply; c, according to hydrostatic test supply. According to a, b class supply of steel, as used to withstand liquid pressure, but also to carry out hydrostatic test. 3, a special purpose seamless tube Boiler with a seamless tube, chemical power, geological seamless steel pipe and oil with a variety of seamless tubes.

Chinese name: seamless steel pipe English name :Seamless steel tube​,seamless tube. seamless pipe,seamless stee pipe Function to transport fluid :Features no seams on the surface Standing resource material :10 #, 20 #, 35 #, 45 #, 16Mn​ Category: Round and Profiled Rolling Technology

DMH United Steel Industry Co.,Ltd will show you the current seamless pipe standard in china​: 1. the current seamless pipe standard: there are 47 items: 19 GB, 25 HB, 3 special purposes; 45 items on the basis of 2 items.

NDT testing means without prejudice or affect the detected object performance, not hurt at being provided to detect objects within the organization, the use of material internal structural abnormalities or defects heat, sound, light, electricity, magnetism and other reactions caused by changes to physical or chemical methods as a means of using modern technology and equipment, equipment, the specimen surface and the interior of the structure, properties, and defect type state, nature, number, shape, position, size, distribution and change inspection and test methods . Non-destructive testing is an effective tool of industrial development is essential, to a certain extent reflects the level of industrial development of a country, the importance of non-destructive testing has been recognized, the main ray inspection (RT), ultrasonic testing (UT), magnetic particle testing (MT) and liquid penetrant testing (PT) four. There are other NDT methods eddy current testing (ECT), acoustic emission testing (AE), thermal imaging / infrared (TIR), leak testing (LT), the AC field measurement techniques (ACFMT), magnetic flux leakage testing (MFL), far-field test detection (RFT), ultrasonic time of flight diffraction method (TOFD) and the like.

Pipeline bear the effects of the pipeline transmission medium pressure and temperature, but also suffer from a variety of delivery through the heart of the impact of natural and human factors that may occur in the course of leaking or breaking all sorts of accidents. Not only due to leakage of pipeline accidents affect transport caused economic losses, but also pollute the environment. To ensure the safe operation of the pipeline and generate pipeline accident prevention should be the design, construction and operation of three aspects, including design and reasonable choice of pipe is very important. As for the pipe, the strength, toughness and weldability are three basic quality standards. It should also consider the environmental and transport medium for pipe corrosion, corrosion-resistant steel choice.

3PE anticorrosive pipe corrosion of oil pipelines from the inside to the outer three layers of tissue corrosion protection Layer 1: the task of steel pipe layer in accordance with the attempt and customer begging 1 general use of seamless pipe (GB eight 163-78) spiral pipe (GB9711- Eight 8; SY / T503 eight -92) and longitudinal welded pipe (GB3092-93).

3PE seamless steel pipe

As a professional supplier of St52.8 Seamless pipes, DMH United Steel Industry Co.,Ltd will offer St52.8 Seamless Tubes price and St52.8 Seamless Tubes machining service. Our DIN 17175 St52.8 seamless pipes and tubes are used in boiler installations, high-pressure pipelines and tank construction and special machinery for both high temperature and high-pressure devices.

DMH United Steel Industry Co.,Ltd could export ASTM A312 TP321 stainless seamless steel pipe - America standard stainless steel pipe. Because of our professionality, good quality and more competitive in the market, the annual quantity we exported is around 6,000tons. Welcome to visit our company, and you can see our mills production scale and testing equipment. We will provide the best quality, competitive price with reliable stainless steel pipe for all of our customers.

In Stock ERW Steel Pipe Price Dec 29 - Jan 29, 2017

Seamless carbon steel pipe , is made of steel ingot or solid tube perforation made of capillary, and then by hot-rolled, cold-rolled or cold dial made. Seamless carbon steel pipe industry in our country has an important position. According to incomplete statistics, there are about 240 existing seamless carbon steel pipe producers in China and about 250 sets of seamless carbon steel pipe units with an annual capacity of about 4.5 million tons. From caliber, <φ76, accounting for 35%,<φ159-650, accounting for 25%.

ssaw steel pipe sizes

you will learn more about steel pipe schedules.

SCM420 alloy steel pipe harden ability is higher, no temper brittleness, weld ability is quite good, form the cold cracking tendency is small, can be good mability and cold plastic strain. Characteristics and application: SCM420 seamless pipe in conditioning or carburizing and quenching condition, used in the manufacture of the corrosive medium and working temperature below 250 ℃, the medium containing hydrogen nitrogen mixture work of high pressure pipe and all kinds of fasteners, the more senior carburized parts, such as gear, shaft, etc.

JIS G 4053 SNCM 439 Seamless Steel Pipes Standard : JIS G 4053 Equivalent material: 40CrNiMoA , 4340 , 817M40 ,816M40 Delivery condition : By heat treatment (normalizing, annealing and high temperature tempering) or heat treatment state delivery, delivery status should be indicated in the contract

As a professional supplier of St52.8 Seamless pipes, DMH United Steel Industry will offer St52.8 Seamless Tubes price and St52.8 Seamless Tubes machining service. Our DIN 17175 St52.8 seamless pipes and tubes are used in boiler installations, high-pressure pipelines and tank construction and special machinery for both high temperature and high-pressure devices.