The cold-rolled stainless steel pipe has the advantages of large yield coefficient， no expansion， bending and so on. In order to reach the health grade standard of stainless steel pipeline， the pipeline after cold rolling must undergo bright annealing， demagnetization， pickling，Products Show calibration and other procedures.
0Galvanized pipe has excellent corrosion resistance. Compared with traditional steel，Beiwan40CrMnMo alloy pipeMarket data statistics its application life is longer. Secondly， this kind of pipe has strong resistance to baking. In case of critical situation， it will not lead to the collapse of building structure in a short time. In addition， this kind of pipe also has a practical advantage， that is， it is more convenient and lighter when carrying out the construction and installation. The operators save time and labor when carrying out the construction， and the operation efficiency has been greatly strengthened. In this regard， it is not difficult to understand why the galvanized pipe is so favored by various construction units.
jBelvilleUsing alloy pipe to produce ring parts can improve the utilization rate of raw materials， simplify the production and manufacturing process and save raw materials and production and processing construction time，Products Show such as roller bearing ring throwing Nowadays， seamless steel pipe has been widely used to produce hydraulic jack sleeve.
On the other hand， when the steel structure changes during heat treatment， that is， austenite transforms into martensite， the increase of specific volume will be accompanied by the expansion of workpiece volume， and each part of workpiece will undergo phase transformation successively， resulting in inconsistent volume growth and structural stress. Due to the change of tissue stress， the tensile stress on the surface and the compressive stress in the heart are just opposite to the thermal stress. The magnitude of microstructure stress is related to the cooling rate， shape and chemical composition of martensitic transformation zone materials.
CVladivostokThe product can withstand any range of operating temperature.
Xi Polished stainless steel pipes shall be subject to internal inspection and strict manual selection by the steel pipe quality inspector through metal detector (or hydrostatic test)，Products Show and qualified products shall be packaged and delivered.
Hot rolled smooth round steel is structural steel， with chemical composition content of C carbon .%，Beiwan40CrMnMo alloy pipeMarket data statistics Si silicon .%， Mn manganese %， s sulfur ≤ .%， P phosphorus ≤ .%， yield strength of mpa and tensile strength of MPa. High temperature continuous casting and rolling or ingot heating rolling. Soft， good weldability， high ductility，.
How are seamless tubes made?
oDetermined by the shape，Reinforcement, galvanized pipe, seamless pipe, welded pipe, alloy pipe, I-beam-Shandong Kaiwen metal material Co., Ltd the section modulus， it shows its superior performance in bearing bending moment， pressure load and eccentric load. Compared with ordinary I-beam， it can greatly improve the bearing capacity and save metal by % ~ %.
DThe fifth is the welding environment control to ensure that the temperature， humidity and wind speed during welding meet the process requirements.
QRecommendation and consultationWelded steel pipe， also known as welded pipe， is a seamless steel pipe made of thick steel plate or hot-rolled strip by electric welding after coiling and forming generally with a fixed length of m. Welded steel pipe has the advantages of simple production and processing process， high production efficiency， many types， specifications and models， and less investment in machinery and equipment projects， but the general compressive strength is less than that of seamless pipe.
lPThird， between the flange on the inner side of the sidewalk beam and the old bridge deck， the widening part of the bridge deck is poured with concrete， and the concrete of the bridge deck pavement is poured at the same time to form a carriageway. The reinforcement mesh is set on the bridge deck pavement and the widening part of the bridge deck to strengthen the overall performance. Fourth， the bridge deck expansion joint is set at the center of the cantilever beam top， and the carriageway pavement is extended and erected on the cantilever beam.
Because of this characteristic， seamless pipe is widely used in oil transportation， natural gas， natural gas， hook mesh， etc.， but its cost is much higher， and it is rarely used under normal circumstances
Installation conditionso Straight seam electric welding steel pipe (yb- is a steel pipe whose weld is longitudinally parallel to the steel pipe. It is usually divided into metric welded steel pipe， welded thin-walled pipe， transformer cooling oil pipe etc.
OIts heat sealing effect is remarkable. It can be directly buried immediately， but also reduce consumption which can not only save resources， not occupy the natural environment， prevent actual operation and maintenance， meet the requirements of thermal insulation and cold protection， reduce heating equipment， unique and convenient installation， and reduce the construction cycle time of the project. On the whole， it is more convenient to use. It can also be used for the transportation of floor heating and hot springs.
Welded pipes with large or thick diameter are usually made of steel blank immediately， while small welded pipes and thick wall welded pipes must only be welded immediately according to nylon tape. After simple grinding and polishing， metal wire drawing is OK.
dBelvilleFilling: welded pipe is welded by electric welding of hot-rolled strip steel， welded thin-walled pipe， transformer cooling oil pipe， etc.
How are seamless tubes made?