16Mn welded steel pipeChanges in supply and demand need to be rationally judged

announcer:hp709HP180518493 release time:2022-02-15 09:29:01

For external welding, a larger welding current is used. However, under the condition of high welding current, the stirring effect of molten pool is enhanced, and the melting amount of welding wire increases accordingly, resulting in the increase of weld reinforcement, the deterioration of weld formation and poor edge transition.

Deviation reel as follows (unit: mm): nominal diameter & amp; amp; lt; 800 800 to 1200 1300 to 1600 1700 to 2400 2600 to 3000 perimeter Deviation & plusmn; 5± 7± 9± 11± The ovality is 1% of the outer diameter, and the quality of no more than 4 steel plate coils is greatly affected by the weld size, mainly including the comprehensive factors such as welding process parameters, flux flow, flux process performance and formed joint.

.Spiral pipe not only has high quality, such as higher flame retardancy, higher Vicat temperature, higher volume resistivity, higher strength and smaller friction coefficient. At the same time, it also has the functions of bending and coil. It is specialized in products and renewable resources business, large-diameter thick wall coiled pipe, thick wall straight seam coiled pipe, steel casing and coiled pipe factory

Extend the length of the part: 566 divide it into 24 equal parts, and the length of each bisector from the middle to the side is: 11 110 106 10 93 84 75 66 57 0 symmetrical, 50 44 40 39 2.

.Diameter of rolled steel pipe: sometimes the diameter of the demand plan is different from that of the supplier.

All continuous pipe welds shall be penetration tested.

What is the manganese content of straight seam coiled pipe? The material of straight seam coiled pipe and an appropriate amount of manganese 1 can significantly improve the cold brittleness of straight seam steel pipe steel, increase the yield strength and tensile strength, reduce the plasticity and impact toughness, and do not be too large; 4 manganese has an effect on the removal of harmful element oxygen in steel; 5MN can also be used to synthesize high melting point (about 1600 ℃, much higher than the general processing temperature of steel), which is at high temperature in steel, so it can reduce the harmful effect of sulfur and lead to hot processing of steel. Sulfur cracked & ldquo; Hot crisp & rdquo; The phenomenon has decreased.


16Mn welded steel pipeChanges in supply and demand need to be rationally judged



The diameter of thick wall coiled pipe is usually higher than dn450. Thick wall coiled pipe is sometimes two welds. The reason why this happens is mainly due to the problems of raw materials and equipment processing. The steel plate with the required width of welded pipe required by the customer is usually not produced by the steel plant, so the weld will occur.

Purchasing standards for steel plate coils in the steel market steel plate coils are popular. What purchasing standards do some users have when purchasing such steel plate coils? The following year old Xiaobian, because steel plate coil plays an important role in construction, railway construction and bridge construction, its quality standards are also more important. If it is for quality solution, it is easy to have an impact. Generally, we can purchase from these aspects.

steel products.

agent.Effective.

Compared with seamless steel pipe, thick wall rolling pipe has the disadvantages of low cost, rapid delivery, breaking the fixed specification of seamless steel pipe, etc. Thick wall coiled pipe is made of steel plate or steel strip by bending and then welding. According to the weld form, it is divided into straight welded pipe and spiral welded pipe. According to the purpose it is divided into general welded pipe, galvanized welded pipe, oxygen blowing welded pipe, wire sleeve, metric welded pipe, idler pipe, deep well pump pipe, automobile pipe, transformer pipe, electric welding thin-wall pipe, electric welding special-shaped pipe and spiral welded pipe. Rolling pipe is committed to producing all kinds of rolling pipes and steel penstocks with circumferential seam and longitudinal ring, and is reformed on the basis of similar specifications and models of traditional rolling equipment. The function of improving the parameters of the rolling and welding steel pipe equipment by 30% fills the gap that the original traditional rolling equipment can not produce. It can produce steel pipes with diameter of more than 400 and wall thickness of 8-100mm. Materials mainly include q23 q34 20#, 16 manganese, 16 manganese capacity, etc. Product executive standard: GB / t50205-200, GB / t3092-2001, etc. The products are widely used in petroleum, chemical industry,20# thick wall coiled pipe, natural gas transportation, pile driving and urban water supply, heating, gas supply and other projects.

The offer is in progress. Welcome new and old customers to consult. Prevent surface damage of steel plate. Thick wall coil and large diameter coil are mainly made of carbon steel, Q19 q23 q34 16Mn, etc. coil is a kind of welded pipe product with simple and flexible process. If the length required by the customer is special, two or more steel pipes must be connected. Therefore, the process of this welded pipe is flexible, which requires a lot of manual processing. The main problem of coiled pipes is welding. Thick wall coiled pipes can be delivered as long as they can be inspected by flaw detection. The relevant requirements are broader than other products.


16Mn welded steel pipeChanges in supply and demand need to be rationally judged



1800mm steel pipe elbow detailed introduction to elbow: first of all, the material is hot pushed, the pusher is a horn shaped core or mandrel, the mandrel is thickened and thickened, the process of pushing the elbow is the process of expanding the diameter, and it is supported on the back. The material tube part passes through the mandrel,45# straight seam welded pipe, and there is an arched frame at the rear to fix the mandrel. There's a car in the middle. Some cars are driven hydraulically, others are driven by mechanical transmission, that is, screw drive, and then the car pushes forward, and the car pushes the pipeline along the core. The rod moves forward, there is an induction coil outside the mandrel, the tube is heated and heated, and then the trolley pushes the tube down and processes one.

Pursuit of excellence.Pipe groove processing and joint pair: when the pipe wall thickness is less than 6mm, it is type I weld; when the pipe wall thickness is greater than 6mm, it is type V weld; For pipes with diameter greater than 600mm and wall thickness greater than 6mm, the bottom of the pipe shall be sealed at the bottom of the pipe; In addition to the lap joint, the other type of gas coil pipe is continuous and solid V-groove butt welding. If the weld is found to be defective, the weld must be re welded. Rewelding shall not be more than twice. The longitudinal weld of coiled pipe in the same cylindrical part shall not be greater than, and the spacing between two longitudinal joints shall not be less than 200mm.

All the welded welds are subject to on-line continuous ultrasonic automatic flaw detector to ensure the NDT coverage of spiral welds. If defective

The main problem of thick wall coiled pipe is welding. As long as flaw detection can be carried out, the requirements related to delivery are wider than other products. The detection of thick wall coiled pipe is mainly ultrasonic flaw detector.

.Deviation reel as follows (unit: mm): nominal diameter & amp; amp; lt; 800 800 to 1200 1300 to 1600 1700 to 2400 2600 to 3000 perimeter Deviation & plusmn; 5± 7± 9± 11± 13 ovality is 1% of the outer diameter, 4 6 8 10 and no more than 4 steel plate coils have standards. At present,Q355b thick wall welded pipe, hydraulic, bridge, roller etc.

Thickness detection thickness detection is very simple, as long as the caliper is OK. Like other pipes.