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3pe anti-corrosion elbow manufacturer IPN8710 anti-corrosion bender: This is also an odorless anti-corrosion material, generally used in drinking water pipelines, drainage pipelines inside and outside wall anti-corrosion, product implementation standard: SY/T0457-2000
FBE anti-rust coating anti-corrosion bender: use electrostatic powder coating processing technology to coat the surface of the seamless steel pipe with anti-rust coating, and apply the film at one time. The coating has the advantages of simple coating operation, good impact resistance and deformation resistance, and high heat resistance, and the product implementation standard: SY/T0315-97
Epoxy resin glass flake coating anti-corrosion bend: The equipment is configured with epoxy resin glue, coal coke asphalt, anti-rust treatment color paste, modifier, and modified material amine. The product has fast dryness, good adhesion, good flexibility, and convenient component packaging and engineering construction. It has the characteristics of acid resistance, alkali resistance, salt resistance, moisture resistance, acid and alkali resistance. It is suitable for the anti-corrosion of machinery and equipment and pipelines of gas gathering stations, drinking water, water supply pipelines, pipelines, liquefied gas, oil pipelines, smelters, sewage treatment stations, and chemical enterprises, and can also be used as anti-corrosion in the upper part of the water of offshore drilling platforms and ships in the petroleum industry, and anti-corrosion of mining and mining machinery and equipment
3PE anti-corrosion elbow manufacturers The key root causes of the decline in the quality of the bend and how to pay attention to it
1. When pure bending, the pipeline is thinned under the tensile stress & 1 effect of the arm wall on both sides of the neutral layer under the action of the external force distance M, and the internal stress on the inner side is forced. The effect is thickened, and the combination of N1 and N2 makes the pipe section change. According to this element, the key factors that cause the quality of the elbow to decrease are RX and SX. Therefore, GBJ235-82 clearly stipulates the RX value under various operating pressure levels and the amount of thinning on both sides, with the aim of ensuring quality by manipulating the RX and SX values
2. As mentioned in the previous article, both sides of the raw material are bent when the elbow, and the geographical location of the neutralizing shaft under the force on the inside is different from the elbow method, in the top bending (shrinking bending) work, the neutralization shaft is located about 1/3 of the surface, and in the rotary bending (rebounding) work, the neutralization shaft is located 2/3 of the surface in the rotary bending (rebound bending) work. Therefore, thick-walled pipelines are bent, and the application of the rotary bending method is beneficial to health.
3. The degree of bending is also one of the factors that endanger the quality of the elbow. When we make bent tires, in addition to the specifications and models specified in a certain size tolerance range, we also stipulate that customers select the corresponding bent tires according to the bending tube when using.
4. The deformable characteristics and external rust of the pipe fittings themselves may also endanger the quality of the elbow. During the on-site construction of the project, the operator must also master the raw materials of the production and processing pipeline, the production and processing characteristics and the production and distinction of the surface rust condition.
5. The harm of moistening to product quality in the whole process of forming:
Carbon steel elbow is a key component of the long gas pipeline, which is based on many areas with complex landforms and extreme climatic conditions, so many large-diameter elbows must be used in pipeline paving. The production and manufacturing of large-diameter elbows and the quality of large diameter bends immediately endanger the safety, stability and economic benefits of project investment in gas transmission pipes.
If the safety stability is poor, the pipeline may explode and crack, causing serious damage to personal safety, and the extreme social impact is also difficult to estimate. Scrap in the manufacture of elbows, for example, can also lead to important property damage.
At this stage, seamless steel pipes from controlled rolling mills are selected in the basic construction of large-diameter natural gas pipelines. Seamless steel pipes for gas transmission pipes can be divided into straight seam arc welded seamless steel pipes (UOE pipes), resistor welded steel pipes (ERW pipes) and spiral seam welded steel pipes (SSAW pipes) according to the forming and welding methods.
3PE anti-corrosion elbow manufacturer
At this stage, most of the large-diameter elbows commonly used in gas pipeline network engineering use UOE
In order to make the elbow consistent with the characteristics of the seamless steel pipe and reduce the difficulty coefficient of electric welding and welding engineering, the large-diameter elbow should be selected for the seamless steel pipe bending of the controlled rolling mill.
Anti-corrosion pipe bending refers to steel pipes that are solved by anti-corrosion production and processing on the surface of the bend pipe, and reasonably avoid and alleviate electrochemical corrosion or chemical changes in the whole process of transportation and application.
The types of anti-corrosion bends are roughly divided into:
Anti-corrosion bender, 3PE anti-corrosion bend, elbow surface to do three layers of anti-corrosion, yi layer anti-rust coating (FBE), second layer of adhesive, third layer of high-pressure polyethylene (PE), three raw materials are integrated, so that the pipeline improves the service life, product implementation standard: SY/T0413-2002, DIN30670
2PE anti-corrosion bends are no different from 3PE anti-corrosion bends, with less yi layer anti-rust coating, only adhesives and high-pressure polyethylene anti-corrosion
IPN8710 Anti-corrosion bend: This is also a odorless anti-corrosion material, generally used in drinking water pipelines, drainage pipelines inside and outside the wall to prevent corrosion, product implementation standard: SY/T0457-2000
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