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Standard for steel grade of petroleum casing
The steel grades of casing include H40, J55, K55, M65, N80, L80, C90, C95, T95, P110, q125 and V150. H40 is a low-grade steel, which is rarely used in the market. The yield strength of J55 and K55 belongs to the same level. The difference between them is that the tensile strength of K55 is...Read more -
Production method of P91 alloy pipe
1. It is divided into P91 alloy pipe hot rolled pipe, P91 alloy pipe cold rolled pipe, P91 alloy pipe cold drawn pipe, P91 alloy pipe extruded pipe, etc. The solid pipe blank is checked and cleaned of surface defects, cut into the required length, sent to the heating furnace for heating and perfo...Read more -
How to identify stainless steel pipe?
1、Magnetic test Magnetic test is the simplest method to distinguish annealed austenitic stainless steel from ferritic stainless steel. Austenitic stainless steel is non-magnetic steel, but it will have slight magnetism after cold working under high pressure; Pure chromium steel and low alloy ste...Read more -
Knowledge of hot dip galvanized pipe
Steel pipes are used to transport gas and heating in daily life. In order to improve the corrosion resistance of these steel pipes, the steel pipes will be galvanized. Galvanized steel pipes are divided into hot-dip galvanizing and electro galvanizing, in which the hot-dip galvanizing layer is th...Read more -
Purpose and characteristics of reducer
Purpose of reducer: 1. Precision cast stainless steel valves can be used for the control of water, gas, steam, oil and corrosive media in chemical, petroleum, metallurgy, light industry, electric power, plumbing, food, medicine, fiber, ink and other industries. 2. Sanitary valves, fluid pipe fitt...Read more -
What are the classifications of stainless steel?
1. Austenitic stainless steel Austenitic stainless steel refers to stainless steel with austenitic structure at room temperature. When the steel contains about 18% Cr, 8% ~ 25% Ni and 0.1% C, it has stable austenite structure. Austenitic chromium nickel stainless steel includes famous 18Cr-8Ni st...Read more -
Precautions for maintenance of stainless steel elbow
Stainless steel elbows will not produce erosion, pitting, corrosion or wear. Stainless steel is still one of the building metal materials. Because stainless steel has good corrosion resistance, it can effectively maintain the integrity of engineering design of structural components. Chromium cont...Read more -
Basic Knowledge of Oil Casing
Casing is a kind of large-diameter pipe, which plays the role of fixing the oil and natural gas well wall or well hole. The casing is inserted into the borehole and fixed with cement to prevent the borehole from separating the rock stratum and borehole collapse, and ensure the cyclic movement of ...Read more -
What is the main function of the flange?
The flange is not a high-pressure flange and is applicable to low pressure, such as engineering construction, air conditioning water system, etc. Flange is often referred to as a screw thread product. For example, the pipe fittings on tap water used at home are screw thread. It is often used in e...Read more -
Alloy Tubes Knowledge
Alloy steel pipe is mainly used for high-pressure and high-temperature pipelines and equipment such as power plant, nuclear power, high-pressure boiler, high-temperature superheater and reheater. It is made of carbon steel, alloy structural steel and stainless heat-resistant steel through hot rol...Read more -
Seamless Steel Tube Knowledge
Seamless steel pipe with hollow section, a large number of used for conveying fluid pipeline, such as conveying oil, natural gas, gas, water and some solid material pipeline. Manufacturing methods: According to different production methods, it can be divided into hot rolled tube, cold rolled tube...Read more -
The price of square rectangular tubes nationwide adjusted slightly, and the transaction was average
【Market Summary】 On the 7th, the price of square rectangular pipes nationwide was slightly adjusted, and the strip steel price was adjusted. The pipe factory had no price adjustments. Some specification merchants sold goods upside down. According to the feedback of traders, today’s shipments we...Read more