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Hu Chunhua, former governor of Hebei Province, had a cordial conversation with Chairman Dong Zhenhai

Hu Chunhua, former governor of Hebei Province, had a cordial conversation with Chairman Dong Zhenhai

-Classification of bends

Folded Carbon Steel: ASTM/ASME A234 WPB, WPC Alloy: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP911,15mo315crmov, 35CrMoV Stainless Steel: ASTM/ASME A403 WP 304-304l-304ln-304nastm/ASME A403 WP 316-316l-316l-316n-316tiastm/ASME A403 WP 321-321H, ASTM/ASME A403 WP 347-347H, Low Temperature Steel: ASTM/ASME A402 WPL3-WPL 6 High Performance Steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70 cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, argon, PVC, PPR, RFPP (reinforced polypropylene) and so on. It can be divided into pushing, pressing, forging, casting and so on. The manufacturing standard can be divided into national standard, electric standard, ship standard, chemical standard, water standard, n Standard, German standard, Japanese standard, Russian Standard and so on. According to its curvature radius: can be divided into long radius elbow and short radius elbow. A long-radius elbow is the outer diameter of a tube with a radius of curvature equal to 1.5, or r = 1.5 D; a short-radius elbow is the radius of curvature equal to the outer diameter of the tube, or r = 1.0 d. (d is the elbow diameter, r is the radius of curvature) . According to the pressure level: there are about 17, and the United States of pipe standards are the same: Sch5s, Sch10s, SCH10, SCH20, SCH30, Sch40s, STD, SCH40, Sch60, Sch80s, XS; SCH80, SCH100, Sch120, SCH140, Sch160, xxs; SCH100, SCH140, Sch160, XS; SCH100, Sch160, XS; SCH100, SCH140, Sch160, XS; Sch10s, Sch160, XS; Sch10s, the two most commonly used are STD and XS. According to different shapes, it can be divided into: Groove type elbow, clip type elbow, double bearing elbow, flange elbow, reducing elbow, sitting elbow, internal and external teeth elbow, stamping elbow, push elbow, socket elbow, butt welding elbow, internal wire elbow, etc. .

-Technical requirements for elbow

Required to control the radius of curvature. For example, if the radius length is 1.5 d, the radius of curvature must be within the required tolerance.

The main function of stainless steel flange

1. Connect the pipeline and maintain the sealing performance of the pipeline; 2. It is convenient to replace a certain pipeline; 3. It is easy to disassemble and check the pipeline condition; 4. It is convenient for the sealing of a certain section of pipeline.

Scope of application of butt welding flange

Butt welding flange is not easy to deform, has good sealing, is widely used, has corresponding rigidity and elasticity requirements and reasonable butt welding thinning transition, the distance between the welding junction and the joint surface is large, and the joint surface is free from welding temperature deformation. The trumpet-shaped body structure is suitable for pipelines with large fluctuations in pressure or temperature or pipelines with high temperature, high pressure and low temperature. It is generally used for the connection of pipelines and valves with a PN greater than 2.5MPa; it is also used for transportation of expensive, flammable and explosive materials. on the medium line.

Precautions for stainless steel elbows

What should I pay attention to when using stainless steel elbows?

Overview of stainless steel pipe fittings

Stainless steel pipe fittings are a general term for various stainless steel pipe connection workpieces, which can be divided into different categories according to shape, use, connection method, etc. It has the characteristics of easy installation, high performance and durability, and is widely used in various pipeline construction and installation.

Located in the“Capital of China Elbow Pipe Fitting”.Hebei Haihao High Pressure Flange&Pipe Fitting Group Co.,LTD is a professionaI enterprise producing flange and pipe fitting.has 20 advanced supporting production lines of flange and pipe fitting;

Established in 1982.Hebei Haihao High Pressure Flange&Pipe Fitting Group Co.,LTD. covers an area of 580,000 square meters,has a staff of 660 peoplewith the total assets of 250 million and an annual output of 100.000 tons.

The company is a professional enterprise producing flanges and pipe fittings, with 22 advanced production lines for flanges and pipe fittings.

Established in 1982.Hebei Haihao High Pressure Flange&Pipe Fitting Group Co.,LTD. covers an area of 580,000 square meters,has a staff of 660 peoplewith the total assets of 250 million and an annual output of 100.000 tons. Located in the“Capital of China Elbow Pipe Fitting”.Hebei Haihao High Pressure Flange&Pipe Fitting Group Co.,LTD is a professionaI enterprise producing flange and pipe fitting.has 20 advanced supporting production lines of flange and pipe fitting;forging and Hammering,forging and pressing,intermediate frequency pushing,machining.cold forming.hot extrusion,heat treatmenf and other superb technologies.wifh chemical analysis,metaIIographic examination and nondestructive testing.mechanical performance testing and other advanced testing equipments,if is capable to produce international and national standard of various high,medium and low pressure specifications of the stainless steel,alloy steel. carbon steel,flange.elbow.bend.three links,reducer,socket and other series products pipeline components.