Q550b large di
Q550b welded sIt should be noted that in practice, it is difficult to achieve the ideal proportion of metal sand and metal ball in the rinsing agent, because the hard and brittle metal sand has a higher crushing rate than the metal ball. For this reason, the mixture should be sampled continuously and the mixed rinse should be tested. According to the particle size distribution, the new rinse agent is added to the cleaning machine and the amount of metal sand is usually the same in the new rinse agent.
The influence of welding process parameters on welding current mainly includes two aspects: according to the production characteristics of spiral steel pipe, small welding current is usually used for internal welding
.A series of water conservancy projects such as sand discharge, mud transportation, dredging and hydraulic reclamation. It is generally believed in the dredging industry that spiral pipe is the Zui best pipe for long-distance water conveyance and solid-liquid mixed transportation projects. The sand and mud discharge pipeline products produced by Hebei Xinghao pipeline industry have been used by hundreds of customers in China. Flange welded spiral steel pipe is widely used in long-distance water supply and drainage in various environments and exported to Japan. The connection is completed by adding flange gasket and fastening it with bolts. Some pipe fittings and equipment have their own flanges, which also belong to flange connection.
In short, the use standard of coiled steel pipe is very important, and the above points can be reasonably explained. For the information of our rolled steel pipe, you can directly consult our manufacturer.
.Flame cutting and plasma cutting are commonly used for sheet metal blanking in our factory. The equipment used includes manual cutting, copier, semi-automatic cutting machine and NC cutting machine. Manual blanking is arbitrarily large compared to other cuts Flexible and convenient, no special supporting cutting equipment is required.
In the process we mentioned, we need to explain each process,Q235B thick wall welded pipe, such as groove. We need to compact both sides of the steel plate with indenter, so as to avoid the formation of peach shaped mouth in the rolling pipe.
After pushing, the elbows should be formed in this hot state, because some elbows will be distorted after improper handling, which is not allowed. In addition, after pushing the head, the outer diameter of the front end is usually large and formed by the forming die. The forming die is actually a press. It must have a set of molds, two semi arcs one on each side. The outer diameter after forming reaches the size of the finished product.
The pipeline installation sequence is based on the principle of sub area and sub system, with small diameter, from the lower layer to the upper layer, from difficult to easy, from the pipe gallery to the equipment. In principle, the pipeline connected with the machine is configured from the inside to the outside to reduce the impact of welding stress on the installation accuracy of the machine. The interface between indoor and outdoor pipelines shall be left outdoors. Q345B thick wall coiled pipe is a kind of material in carbon steel and is widely used. The thickness of Q345B thick wall coiled pipe is generally more than 10mm, which is widely used in drainage engineering, sewage pipeline, dredging pipeline, construction pipeline, etc. Q345B thick wall coiled pipe is a welded pipe product, and the process in the welded pipe is relatively simple and flexible. This type of steel pipe usually has no inventory and is processed by user. If the quantity is small, the raw materials are not good. The main problem of Q345B thick wall coiled pipe is welding. As long as it is possible, the delivery related requirements can be compared with other products.
The process coat of the coil pipe is made of high-density polyethylene, which has extremely high mechanical strength and excellent corrosion resistance, ultraviolet stabilizer and carbon black. The polyethylene outer sleeve is easy to age, such as stored in the open air Place the cover and stack away from high heat source and fire source. After making the coiled pipe, it is forbidden to be exposed to the sun and quench, otherwise the polyethylene outer pipe is easy to crack, two longitudinal welds are allowed, and the weld spacing exceeds 300 mm. The welding appearance and quality standard shall not be lower than the level standard in the welding specification.
Quality improvement.High. Hot rolled thick wall coiled pipe is widely used: oil cylinder, hydraulic pressure, bridge, etc.
1 carbon structural steel: q215-a, q215-a. & middot; F,Q215-B,20# thick wall coiled pipe,Q215-B· F,Q235-A· F,Q235-B,Q235-B· F. Q235-c ordinary carbon steel: B2 BY2 B2F by2f B3 by3 B3F by3f a2ay2 a2f ay2f A3 ay3 A3F ay3f2 high quality carbon steel: 10 15 20 transmission shaft steel 3 low alloy structural steel: 123mn 16Mn 19mn 08ti 10ti15ti4 special purpose steel thick wall coil is made of steel plate. Long term coil, Q235B coil, Q345B coil, large diameter thin wall coil large diameter thick wall coil, L360 coil stainless steel coil, 16Mn coil, 20 old brands, with price advantages and quality! Thick wall coil can be divided into two types: hot coil and thick wall coil.
The process of thick wall straight seam coiled pipe is generally rolled. If the diameter required by the customer is particularly large, it is difficult for general machinery and equipment, so it is necessary to use coiled pipe. First,Q345B reel, after the steel plate is rolled, then weld the two rolled steel pipes. The weld is also called T-welding. Sometimes, the large diameter thick wall straight seam steel needs to roll and weld the two steel plates, Therefore, there may be two welds on a pipe body, also known as double welds. Thick wall straight seam coiled pipe has a wide range of materials. As long as it is a steel plate that can be ordered in a steel plant, it is basically OK. The main problem of the product is the welding quality. The welding quality directly determines the quality of the product which is the main step in the thick wall rolling pipe. It is suitable for columns for bearing steel structures such as buildings, bridges, dams and offshore platforms, super long-span building structures and electric pole tower and mast structures requiring wind resistance and earthquake resistance.
The thickness of hot-rolled thick wall coil is generally greater than 20mm, and the outer diameter range is 450-3000mm. The hot-rolled thick wall coil is rolled, welded, formed, ribbed and defect detection under the condition of steel plate heating. Sometimes the wall thickness is relatively thick and secondary heating is required. It is characterized by small outer diameter tolerance and uniform wall thickness. It is important that the hot rolled thick wall coil will not damage the properties of raw materials. The disadvantage of hot roll thick wall rolling pipe is that the treatment time is long. Hot rolled thick wall coiled pipe is widely used: cylinder, hydraulic, bridge, roller, etc.
Economic management.The effect of antirust oil on thick wall coiled pipe is antirust effect, which can make the thick wall coiled pipe as smooth as new for a long time and reduce the external corrosion to it. It can also increase its sealing performance and ensure that there will be no problems when transporting fluid. In addition, it has moisture-proof performance, uses antirust oil to isolate the direct air of thick wall welded pipe, so it has little chance of being changed by the external situation, which increases its stable performance and safer use.
The steel plate coil is cut into single pieces by air plasma cutting machine.
During pipe rolling, the surface damage of steel plate shall be prevented. The parts with serious scratches must be polished for transition, and the wall thickness of the polished parts shall not be less than the design wall thickness.
.After pushing, the elbows should be formed in this hot state, which is not allowed. In addition, after pushing the head, the outer diameter of the front end is usually large and formed by the forming die. The forming die is actually a press. It must have a set of molds, two semi arcs, one on each side. The outer diameter after forming reaches the size of the finished product.
This measurement method overcomes the problem of steel
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, we carry out construction according to the acceptance of standard GB / t19793-92.