Changsha Xiangjia Metal Materical Co., Ltd.

Currently China's   seamless steel pipe   standards: 1. Current seamless steel pipe standards: 47 items in total, it including: GB/T25 items, HB3 items, 19 items for special purposes; 2 basic items, 45 items. 2. Commonly used standard: ① GB/T2102-2018 Acceptance, packaging, marking and quality certificate of steel pipes. ② GB/T17395-2008 Size, shape, weight and allowable deviation of seamless steel pipe. ③ GB/T5310-2018 Seamless steel pipes for high pressure boilers. ④ GB/T9948-2018 Seamless steel pipes for petroleum cracking. ⑤ GB/T6479-2018 Seamless steel pipes for high-pressure fertilizer equipment. ⑥GB/T18248-2018 Seamless steel pipes for gas cylinders. Changsha Xiangjia Metal Materical Co., Ltd.  the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various grades and sizes. Years of production experience and manufacturing facilities who have a capacity of 200,...

Packaging requirements for   pipe fittings : 1. The package must be moisture-proof, mildew-proof, rust-proof, anti-corrosion, etc., as well as vibration-damping and shock-proof measures, such as taking linoleum and fillers. 2. The goods comply with the requirements of "GB191-2000" and "GB/T6388-1986" packaging, storage and transportation instructions.  3. Bundled the same specifications, it is recommended to use a bundle of 5/10/20 to ensure that each bundle is neat, the quantity can be clearly counted from the side and the material card is marked, indicating the material code, specification model, quantity, order No., supplier name. 4. A support that height not less than 1100MM should be placed on the bottom when loading. 5. For bare equipment, the above content should be marked on the equipment with a metal label. Large pieces of equipment should have adequate equipment stands or packing dunnage. 6. A detailed packing list with the name, quantity and drawing numbe...

The high quality of   seamless steel pipes   is mainly reflected in the specification accuracy and surface finish. Even after quenching and tempering, there will be no air oxide film on the surface of the pipe, nor will it be deformed by cold drawing. Sophisticated machining and manufacturing solutions are the advantages of seamless steel pipes.   Clean and maintain the surface of the seamless steel pipe to a certain extent to increase the service life of the seamless steel pipe. Many seamless steel pipes on the market will have great deviations in the model specification level. Even in different parts of seamless steel pipes, there are large differences in the inner diameter or wall thickness. Such a pipeline will undoubtedly cause a lot of problems throughout the application. But our seamless steel pipe is different, our seamless steel pipe has very strict regulations for each part of the pipeline.   Changsha Xiangjia Metal Materical Co., Ltd.   the Steel Pipe...

  1.      Cleaning of   ERW steel pipe   The steel surface is cleaned with solvent and emulsion to remove oil, grease, dust, lubricant and similar organic matter, but it cannot remove oxide scale, rust on steel surface, flux, etc., and can only be used as anti-corrosion production   auxiliary means.   2.      If the steel surface is firmly attached to the iron oxide scale, the rust removal effect is not ideal and cannot meet the requirements of the anti-corrosion construction for the depth of the anchoring particles.  ERW steel pipe rust removal tools mainly use wire brushes and other tools to grind the steel surface, manual rust removal can reach SA2 level, power tool rust removal can reach SA3 level, can remove loose or raised oxide scale, rust, welding slag Wait.   3.      The pickling of ERW steel pipe is generally treated by chemical and electrolytic methods, which can be used as a re-tre...

ERW steel pipe  is a steel pipe with the weld seam parallel to the longitudinal direction of the steel pipe. ERW steel pipe has a simple production process, high production efficiency, low cost and rapid development.   When choosing raw materials, pay attention to:   1.      According to the quality requirements of the ERW steel pipe produced, reasonably select the steel type, specification, allowable deviation and production method of the required raw materials;   2.      The raw material of ERW steel pipe has no internal and external surface defects;   3.      The packaging of ERW steel pipe is neat and firm, and there is no loose volume and tower shape;   4.      For strips of the same batch of ERW steel pipe, the steel number, heat number and batch number should be distinguished. Changsha Xiangjia Metal Materical Co., Ltd.   the Steel Pipe Division of ADTO GROUP, is one...

  1.      Cleaning Use solvent and emulsion to clean the surface of   ERW steel pipe   to remove oil, grease, dust, lubricant and similar organic substances, but it cannot remove rust, oxide scale, welding flux, etc. on the surface of ERW steel pipe, so it is only used in defense operations as an aid.   2.      Pickling Generally, two methods of chemical and electrolytic pickling are used for pickling, and only chemical pickling is used for pipeline anticorrosion, which can remove oxide scale, rust, and old coating. Although chemical cleaning can make the surface achieve a certain degree of cleanliness and roughness, its anchor pattern is shallow and it is easy to cause pollution to the surrounding environment.   3.      Tool rust removal Mainly use tools such as wire brushes to grind the surface of ERW steel pipe, which can remove loose oxide scale, rust, welding slag, etc. The rust removal of hand too...

1.       The raw materials are strip coil, welding wire and flux. They must pass strict physical and chemical inspections before they are put into operation.   2.       The head and tail of the strip are butted, using single-wire or double-wire submerged arc welding, and active submerged arc welding is used for repair welding after rolling into a steel pipe.   3.       Before forming, the strip is processed by leveling, trimming, planing, surface finishing, transportation and pre-bending.   4.       The electric contact pressure gauge is used to control the pressure of the cylinder on both sides of the conveyor to ensure the smooth transportation of the strip.   5.       Use external control or internal control roll forming.   6.       The welding seam gap control device is selected to ensure that the welding seam ...