According to the functions and uses of gate valves and butterfly valves, a gate valve has small flow resistance and good sealing performance. Because the disc of the gate valve is perpendicular to the...
Forging of slip-on flanges can be categorized into rotary forging, roll forging, cross-wedge rolling, rotary swaging, etc. based on the movement mode. For improving the utilization rate of materials,...
Sealing principle The two sealing faces of the screw press against the flange gasket and form a seal, but this also causes damage to the seal. So, in order to maintain the seal, the screw bolts, as well...
There are two problems may occur if the amount of grease is neglected when injecting. One is that the amount of grease is less than the required amount, and the abrasion of sealing surface is accelerated...
The production process of blind flange can be divided into three types: forging, casting and cutting. Cast flange and forged flange have a shape with accurate size, and advantages such as small workload,...
This is an analysis of causes of casting defects during the valve manufacturing process. Gas Bubbles These are small cavities that cause by residual gas during the metal solidification process. Their...
Welded steel pipes are also known as welded pipes, which can be divided into longitudinal welded pipe and spiral welded pipes according to the type of weld joint; or furnace butt weld pipes, electric...
The application scope of steel pipes is quite extensive with the development of this industry that they have branched out into not only gas or liquid transportation, but also associated products manufacturing...
China has made progress in reducing steel production capacity, which has led to increased efficiency and mismatch between supply and demand. In the first seven months of 2018, China cut 2.47 billion tons...
Cast iron pipes are used for water supply, drainage and gas pipelines. They include straight cast iron pipes and fittings. According to different casting methods, a cast iron pipe is divided into a continuous...
What is the crevice corrosion of stainless steel pipes? There may be metallic or non-metallic deposit sediment on the surfaces of stainless steel pipes, and the deposit sediment will form the crevice...
Sulfur(S): Sulfur is also a harmful element under the normal circumstance. It will create the hot brittleness of stainless steel pipes, decrease the impact ductility of stainless steel pipes and bring...
1. Carbon(C): When the carbon content in the stainless steel pipes is increased, yield and tensile strength of stainless steel pipes will be increased, but the plasticity and impact strength will...
Construction technology of the heavy-duty epoxy powder coating and the polyethylene composite coating In the construction technology of coated pipe 3LPE's heavy-duty epoxy powder coating,...
The three-layer polyethylene (3LPE) coating anti-corrosion steel pipe and the two-layer polyethylene (2LPE) coating anti-corrosion steel pipe both belong to the anti-corrosion steel pipe. The...
As a testing method widely used in the steel pipe industry, NDT is short for nondestructive testing. Today, we are going to introduce the application of NDT in the steel pipe industry to you. In...
Why should we have heat treatment on steel pipes? What are the main types of steel pipes' heat treatment process? Heat treatment is one of the important processes in the production process...
Seamless steel pipes with small diameters can be called small bore seamless steel pipes, which can be divided into seamless small bore steel pipes and straight seam (also known as...
The price of the stainless steel pipe has always been a matter of concern to customers. Sometimes, customers ask why the prices of the stainless steel pipe with the same specification are...
Plate is one of the four major kinds of steel products (plate, tube, extrudate, wire). In developed countries, steel plate production accounts for more than 50% of total steel production. With the...