August 23, 2022
According to the application is divided into general welded pipe
Gulp of straight seam Arc Welding Steel Pipe standards: also called welded steel pipe, is to use steel plate or steel strip after bending forming, electric model to 0317. (can be roughly divided into the scaffold tube, fluid pipe, wire casing, stent tube, guardrail tube etc. Also can be used to other mild steel welding manufacturing. Divided into the form of the weld seam welded pipe and spiral welded pipe. Of the specifications of the welded pipe in nominal diameter (mm or inches) nominal diameter is different from the actual, welded pipe wall thickness by the regulation with ordinary steel pipe and thickening steel pipe, steel pipe and the form of the pipe end points with thread and does not take two, table 6 to 17 for welded steel pipe size.
After which, according to various USES and different production process.) And low pressure fluid welded pipe is a kind of straight seam welded pipe, generally water, gas transmission, is more than general welded pipe after welding ends to a water pressure test, so low pressure fluid tube a little higher than ordinary straight seam welded pipe prices generally.Execution standard GB/T0317 number 6012889. (due to spot welding with steel pipe into a straight line and name). Steel pipe for pressure, bending, flattening and so on experiment, the surface quality is a certain request, usually the delivery length for 4 to 10 m, often required scale (or foot) delivery of the goods.
According to the application is divided into general welded pipe, galvanized welded pipe, oxygen blowing metric welded pipe, welded pipe, wire casing, roller tube, deep well pump pipe, auto tube, transformer, electric welding thin wall pipe, welded pipe and spiral welded pipe. 6012755 standard, and then through the high frequency welding,
TP410 Martensite Stainless steel tube submerged arc welding. Mouth straight seam welded pipe is a general term, ways to use steel strip production, in the high frequency welding equipment straight seam welded pipe are called straight seam welded pipe. General welded pipe: general welding work for low pressure liquid. Use Q195A, Q215A, Q235A steel manufacturing.
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August 09, 2022
steel pipe meets the design requirements
One of the spiral pipe (SSAW steel pipe) testing methods is to carry out a
water pressure test, so what is the purpose of the water pressure test? Here is
a brief introduction.The hydraulic test of the spiral steel pipe during the
construction is a comprehensive inspection of the quality of the pipe, the
joint, and the construction I. It is also an indispensable key test item before
the project acceptance.
Calculation formula of hydrostatic test pressure of
spiral steel pipe: P=2ST/D(P: test pressure of hydrostatic test, unit (Mpa); S:
test stress of hydrostatic test, unit (Mpa); T: nominal wall thickness of steel
pipe, unit (mm); D: nominal outer diameter of steel pipe, unit (m)), the
calculation result is accurate to 0.1Mpa.The SY/T 5037-2012 standard stipulates:
For spiral steel pipes with a nominal outer diameter of less than 508mm, the
hydrostatic test pressure retention time is not less than 5s, for spiral steel
pipes with a nominal outer diameter of not less than 508mm, the hydrostatic test
The pressure holding time is not less than 10s.The GB/T 9711-2011 standard
stipulates: For spiral steel pipes with a nominal outer diameter of less than
457mm, the hydrostatic test pressure retention time is not less than 5s, for
spiral steel pipes with a nominal outer diameter of not less than 457mm, the
hydrostatic test The pressure holding time is not less than 10s.Spiral welded
pipe hydrostatic test is to test whether the steel pipe meets the design
requirements at the specified pressure by filling,
pressurizing, and maintaining
pressure into the test steel pipe. It is the most intuitive and closest testing
method to the actual use of the steel pipe. The inspection standard clearly
requires that each spiral welded pipe be subjected to a hydrostatic pressure
test, mainly to check that the seam or the pipe body is not damaged or leaked
under the specified level of pressure.While the hydrostatic test inspects the
quality of the steel pipe itself, the test steel pipe will undergo certain
elastoplastic deformation under the superposition of hydrostatic pressure load
and inherent residual stress, which will affect the external dimensions,
mechanical properties, and residual stress distribution of the steel pipe. The
quality of these three aspects is closely related to the safety of pipeline
operation. Therefore, it is of great significance to study the influence of
hydrostatic pressure test on the external dimensions, mechanical properties, and
residual stress distribution of spiral welded pipes.Tips: ASTM A53 ERW steel
pipe is a typical Carbon Steel Pipe (CS erw pipe). It is largely used stainless
steel u-tube to convey fluids at low / medium pressures such as oil, gas,
steam, water, air and also for mechanical applications.
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August 08, 2022
The difference starts from the fourth step.
The tube blank is fed into the furnace and heated to approximately 1200 degrees Celsius. After the quality inspection, the steel pipes must pass strict manual selection. After annealing, use a special acid liquid for pickling. After the steel pipe is sized, it enters the cooling tower and is cooled by spraying water.com. In terms of wall thickness, cold-rolled seamless pipes are more uniform than hot-rolled seamless pipes, hot-rolled pipes have lower accuracy and rough surface, while cold-rolled pipes have higher precision, better surface roughness and higher prices. The difference starts from the fourth step.Generally, the production process of seamless steel pipes includes two types: hot rolling and cold drawing. with paint. It is largely used to convey fluids at low / medium pressures such as oil, gas, steam, water, air and also for mechanical applications.
After squeezing, take off the tube for sizing. If there are cracks or bubbles inside the steel pipe, it will be detected.Generally, the more common piercing machine is a tapered roller piercing steel pipe piercing machine.1. The sizing machine uses a tapered drill bit to rotate at a high speed into the steel blank to punch holes to form a steel pipe (the inner diameter of the steel pipe is determined by the outer diameter of the sizing machine drill bit). After the round tube blank is emptied, it needs to be headed and annealed.The raw material for rolling seamless pipes is round pipe blanks. After the steel pipe is cooled, it will be straightened. The round pipe blanks are cut by a cutting machine into a billet with a length of about 1 meter and sent to the furnace for heating via a conveyor belt.
Rusty thin-walled steel pipe, special-shaped steel pipe. Cold rolled and delivered in heat-treated condition. ASTM A53 ERW pipe is a typical carbon steel pipe. After the steel pipe is straightened, it is sent by the conveyor belt to the metal flaw detector for internal flaw detection. Then it is followed by multiple cold drawing.From the outside, the length of cold drawn seamless pipe is generally shorter than that of hot rolled seamless pipe. Hot-rolled steel pipes are delivered in hot-rolled state or heat-treated state. The heating tube billet fuel is hydrogen or acetylene. Cold rolled seamless steel pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, and other steel pipes, as well as carbon thin-walled steel pipes, alloy thin-walled steel pipes, and stainless steel pipes. After heat treatment, it is straightened.
After piercing, the tube blank is cross-rolled by three rolls and continuously rolled. After the quality inspection of the steel pipe, paint the serial number, specification, production batch number, etc.B is the grade in ERW high frequency welded pipe, divided into A and B grades.Tips:ASTM A53 Gr. This piercing machine has high production efficiency, good product quality, large perforation diameter expansion, and can penetrate a variety of steel types. It is hoisted into the warehouse by a crane. After the tube is out of the furnace, it must be pierced by a piercing machine. Hot-rolled seamless steel pipes are divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes. After the steel pipe is straightened, it is sent by the conveyor belt to the metal flaw detector for internal flaw detection.
After pickling, apply oil. The temperature control in the furnace is a key issue. If there are cracks in the steel pipe, the problem of bubbles and the like will also be picked out.The rolling method of cold drawn seamless steel pipe is more complicated than that of hot rolling, and the first three steps
wholesale stainless steel u-tube of their production process are basically the same
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