The forging of flat welded flange can be divided into free forging, frog forging, extrusion, die section, closed die section and closed impact forging. The forging technology of flat welding flange can be divided into free forging, rough forging, extrusion, die forging, closed die forging and close

The pipeline buried in the ground can occupy less land, is conducive to combat readiness, basically is not affected by climate and season and other external factors, the more important is to reduce the heat loss in hot oil transportation and prevent pipe and pipe stainless steel elbow heat deformati

Precautions for use of stainless steel elbow Stainless steel elbows should be used and maintained in an accurate and fair manner. Note: A, stainless steel elbow ball valve, globe valve, gate valve use, only for fully open or closed, do not allow to do flow regulation, so as to avoid sealing surfa

Advantages and disadvantages of hot-dip galvanized steel pipe Hot dip galvanized steel pipe is the strip or plate bending by the spiral bending forming, with double-sided submerged arc automatic welding in the welding seam and seam made of galvanized steel pipe, for the following reason it can be w

Flange working characteristics: 1, a remote control of automatic butterfly valve, at the same time with the characteristics of the flange butterfly valve, butterfly valve can be equipped with a wide diameter; 2. Power supply is the driving energy of butterfly valve. It has a wide range of power so

Flange in the oil and industry above the application is very common, we can see the use of butt welding flange in various categories of industry. However, the use of welding flange is the need to have a lot of attention, these attention is the need to pay attention to. what are the fundamental co

The total heat transfer coefficient of a metal depends on other factors besides the thermal conductivity of the metal. In most cases, the heat dissipation coefficient of the film, the rust skin and the surface condition of the metal. Because stainless steel keeps the surface clean, it conducts hea

In the process of production, elbow can be effectively divided into long radius thick wall elbow and short radius thick wall elbow. A long radius thick wall elbow has a radius of curvature equal to 1.5 times the outer diameter of the pipe, i.e., R=1.5D. A short radius thick wall elbow has a radius

It is divided into general welded pipe, galvanized welded pipe, oxygen blown welded pipe, wire bushings, metric welded pipe, roller pipe, deep well pump pipe, automobile pipe, transformer pipe, welding thin-wall pipe, welding special-shaped pipe, scaffolding pipe and spiral welded pipe. General we

Spiral steel pipe is a kind of product formed by welding technology, so in the production process for the welding process is very strict. (1) Raw materials are strip coil, welding wire and flux. Strict physical and chemical tests must be carried out before being put into operation. (2) The joint