Changsha Xiangjia Metal Materical Co., Ltd.

Oil casing pipe   is used to support the walls of oil and gas wells to ensure the operation of the entire oil well after the drilling process and completion. Each well uses several layers of casing pipe according to different drilling depths and geological conditions. Unlike oil pipes and drill pipes, oil casing pipe cannot be reused and is a one-time material. Oil casing pipe is very important to keep oil well running. Due to the different geological conditions, the downhole stress state is complex, and the combined effects of tension, compression, bending and torsional stress act on the pipe body, which puts forward higher requirements on the quality of the casing pipe. Once the casing damaged, it may lead to reduction in production of the entire well, or even scrap. According to the strength of the steel, the casing can be divided into J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. Different well conditions and depth require different steel grades. In a corrosive environment,

Tempering is a heat treatment method, aim to improve the comprehensive properties of steel, that is, high temperature tempering after quenching. The steel has both high strength and excellent toughness, plasticity, cutting performance and so on. The  seamless steel pipe  needs to be heated during tempering. The heating temperature to be determined according to the material and specific composition of the steel. The selection of the quenching medium is based on the permeability of the steel and the size of the seamless steel pipe. The internal stress is very large and brittle, after the seamless steel pipe is quenched, so the seamless steel pipe must be tempered at a high temperature after quenching in order to eliminate the internal stress of the seamless steel pipe, to increase the toughness, and adjust the strength. High temperature tempering is tempering between 500-650°C. Most quenched and tempered parts work with big dynamic loads. They have to bear the effects of stretching, comp

Alloy seamless steel pipe   is hollow section and no weld seam steel pipe. It is widely used in pipelines for conveying fluids, such as oil pipelines, natural gas pipelines, gas pipelines, various liquid pipelines and pipelines for solid materials due to the characteristics of seamless steel pipe. Alloys are substances with metallic properties synthesized by mixing and melting two or more metals or nonmetals, cooling and solidifying. The biggest advantage of alloy steel pipe is that it has a 100% recovery rate, which is in line with the national strategy of energy saving and environmental protection. Also, national policies are vigorously encouraging the production and development of alloy seamless steel pipe. At present, the use of alloy seamless pipe in our country is narrowed, so alloy seamless steel pipes have big space to development in our country. Alloy seamless steel pipe common material: 16Mn, 12Cr1MoV, P22 (10CrMo910) T91, P91, P9, T9, WB36, Cr5Mo (P5, STFA25, T5) 15CrMo (P11

The difference between   slip on flange and butterfly valve flange   can be divided into the following points: 1. The connection size of the butterfly valve flange and the slip on flange is the same, the difference is that the inner diameter of the flange is different, the inner diameter of the butterfly valve flange is smaller than slip on flange, and the butterfly valve flange has two inner diameters , a small inner diameter and a large inner diameter. 2. According to the name of the butterfly valve flange, we can know that it is a special flange for butterfly valves. The butterfly valve flange can be combined with the rubber ring of the butterfly valve to ensure the tightness of the installation position to get the best sealing effect. 3. The sealing structure of the butterfly valve flange adopts polytetrafluoroethylene, synthetic rubber and phenolic resin to form a composite valve seat, which makes the valve seat have better strength while being elastic. The slip on flange also cal

" ERW steel pipe " is straight seam resistance welded pipe, English Electric Resistance Welding, short for ERW, used to transport oil, natural gas and other vapor and liquid objects The difference between ERW steel pipe and seamless steel pipe is that ERW has a weld. The seamlessness technology of ERW steel pipes is divided into geometric seamlessness and physical seamlessness. Geometric seamlessness is to remove the internal and external burrs of ERW steel pipes. With the development of seamlessness technology, The internal burr can be controlled at about -0.2mm ~ O.5mm. Physical seamlessness is to use a medium-frequency induction heating device to heat the weld area to AC3 (927°C), and then perform an air-cooling process with a length of 60m and a speed of 20m/min, and then water-cool when necessary. So far, advanced ERW units in the world have used this method to process welds. The high-quality ERW steel pipe is not only unable to distinguish the weld seam, but also has a