Steel bending pipe processing and forming technology 1. Die forging. For socket welding and threaded tees, crosses, elbows, and other small pipe fittings, the shapes are more complex and should be manufactured by the die forging process. The die forging blank should be rolled profiles, such as bars

1. The principal requirement for stacking spiral steel pipes is to stack them according to types and specifications on the premise of ensuring stable stacking and ensuring safety. Different types of materials should be stacked separately to prevent confusion and mutual erosion; 2. It is prohibite

The processing methods of 3pe anti-corrosion steel pipes are generally divided into two types: winding type and round die covering type; both are composed of 3-layer structure: the first layer of epoxy powder (FBE>100um), the second layer of adhesive (AD) 170~250um, The third layer of polyethylen

Cleaning methods for large diameter steel pipes: 1. Shot blasting and rust removal: A high-power motor drives the blades to rotate at high speed, so that steel sand, steel shots, wire segments, minerals, and other abrasives are sprayed and blasted on the surface of the steel pipe under the action o

If the spiral steel pipe for water transportation is to transport tap water or drinking water, the inner wall is generally made of IPN8710 non-toxic anti-corrosion coating, and the outer wall is made of epoxy coal pitch anti-corrosion. Of course, it can also be coated with internal and external plas

Characteristics of large-diameter straight-seam plastic-coated steel pipes: Its characteristics combine the characteristics of straight-seam steel pipes and the characteristics of epoxy resin. 1: Characteristics of straight seam steel pipes: Straight seam steel pipes have a simple production proc

Cleaning: 1. The workpieces and fixtures should be cleaned of oil, residual salt, paint, and other foreign matter before heat treatment. 2. The fixture used for the first time in the vacuum furnace should be degassed and purified in advance at a vacuum level not lower than that required by the wor

310S stainless steel thick-walled steel pipe has very good oxidation resistance and corrosion resistance. Because it contains a high percentage of chromium and nickel, it has high creep strength and can continue to operate at high temperatures. The working temperature is 1200 ℃, the continuous use t

Many variable factors characterize the corrosive medium, namely chemicals and their concentration, atmospheric conditions, temperature, and time, so it is difficult to use and select materials without knowing the correct properties of the medium. However, the following can serve as a selection gu

Defects that are prone to occur in the submerged arc welding zone include pores, hot cracks, and undercuts. 1. Bubbles. Bubbles mostly occur in the center of the weld bead. The main reason is that hydrogen is still hidden in the welded metal in the form of bubbles. Therefore, the measure to elimina

Overview of the development of high-frequency straight seam welded pipe production, high-frequency straight seam welded pipe production technology and workshop layout, typical high-frequency straight seam welded pipe units and series, strip preparation equipment, continuous plowing unit, L-shaped

The quality of non-standard straight seam welded steel pipes is not only related to their service life but also to their subsequent use efficiency. So when we buy non-standard straight seam welded steel pipes, how can we buy high-quality non-standard straight seam welded steel pipes? What about stra

Straight seam steel pipe purchasing method: 1. Purchasing requires an understanding of the types of steel pipes 1) By type: straight seam steel pipe, seamless steel pipe, spiral steel pipe, etc. 2) Sectional shape classification of straight seam steel pipes: square pipe, rectangular pipe, ellipti

The choice of thick-walled steel pipe welding method should be based on the material and wall thickness of the thick-walled steel pipe. Because different welding methods have different arc heat and arc force, different welding methods have different characteristics. For example: Tungsten arc welding

There are three most commonly used welding methods for stainless steel: manual welding (MMA), metal arc welding (MIG/MAG), and tungsten inert gas welding (TIG). While these welding methods are familiar to most people in the stainless steel industry, we feel this area deserves a closer look. 1. Ma

Thin-walled stainless steel pipes have the following outstanding advantages: excellent mechanical properties, superior wear resistance, good safety and health performance, good temperature resistance, good thermal insulation performance, smooth inner wall with low water resistance; beautiful, clean,

API standards stipulate that the internal and external surfaces of import and export oil casing shall not be folded, separated, cracked, or scarred. These defects should be completely removed, and the removal depth should not be less than 12.5% of the nominal wall thickness. Petroleum casing must un

First, the principles of hot-dip galvanized steel pipes and galvanized steel pipes are different 1. Hot-dip galvanized steel pipe: To improve the corrosion resistance of steel pipes, ordinary steel pipes are galvanized. 2. Galvanized steel pipe: Galvanized steel pipe reacts molten metal with the iron matrix to produce an alloy layer, thereby combining the matrix and the coating. Second, the characteristics of hot-dip galvanized steel pipes and galvanized steel pipes are different 1. Hot-dip galvanized steel pipe: The surface of the galvanized steel pipe should have a complete galvanized layer, and there should be no uncoated black spots and bubbles. Small rough surfaces and local zinc tumors are allowed. 2. Galvanized steel pipe: To ensure the uniformity of the galvanized layer, the steel pipe sample must not turn red (copper-plated color) after being immersed in copper sulfate solution for 5 consecutive times. Third, hot-dip galvanized steel pipes and galvanized steel pipes have different uses 1. Hot-dip galvanized steel pipes: The iron pipes used for gas, greenhouses, and heating are also galvanized steel pipes. As water pipes, galvanized steel pipes produce a lot of rust and scale inside the pipes. The yellow water flowing out not only pollutes the sanitary ware but is also mixed with rough inner walls. The breeding of bacteria and rust causes excessive heavy metal content in the water, seriously endangering human health. 2. Galvanized steel pipe: widely used in agricultural greenhouses, fire protection, gas, water supply and drainage, and other fields.