Various management systems for enterprises that produce stainless steel pipes

304 is a versatile stainless steel that is widely used in equipment and parts that require good overall properties (corrosion resistance and formability). 304 stainless steel is a grade of stainless steel produced in accordance with the American ASTM standard. 304 is equivalent to 0Cr19Ni9 (0Cr18Ni9) stainless steel in China.

304 contains 19% chromium and 9% nickel. 304 is the most widely used stainless steel and heat-resistant steel. It is used in food production equipment, Xitong chemical equipment, nuclear energy, etc.

Stainless steel pipe fittings are widely used in pipe engineering, whether industrial or hygienic, and there are many product categories such as stainless steel tee.

Crosses and stainless steel elbows are stainless steel pipe fittings. The specifications and precision requirements are different in different use environments, and many manufacturers do not follow the industry standards during production, so the product quality cannot meet the highest requirements or cannot meet the requirements of pipeline use.

The research results on the quality of stainless steel pipe fittings have certain guiding significance for actual production. The influence of different process parameters such as feed, rotation angle, friction coefficient and opening angle on the rolling results was emphatically analyzed. **The influence trend of different feeds and opening angles on the rolling force and the influence of the rotation angle on the deformation-induced motion of the pipe fittings are discussed.

Through the comprehensive analysis of the simulation results, reasonable process parameters are obtained, which provides a basis for parameter optimization. It can significantly improve the mechanical properties, dimensional accuracy and surface quality of stainless steel pipe fitting materials.

There are various connection methods of stainless steel pipe fittings, and the common types of pipe fittings are compression, compression, union, pushing, pushing, socket welding, unionized flange connection, welding, and a series of derivative connections combining welding and traditional connections. Depending on their principle, these connections have different scopes of application, but most of them are easy to install, strong and reliable.

Stainless steel seamless steel pipe for structural use (GB T14975-2002)Stainless steel seamless steel pipe for fluid transportation (GB T14976-2002)Stainless steel welded steel pipe for fluid transportation (GB T12771-2008)Austenitic-ferritic duplex stainless steel seamless steel pipe (GB T21833-2008)Austenitic-ferritic duplex stainless steel welded steel pipe (GB T21832-2008)Decorative welded stainless steel pipe (YB T5363-2006) Stainless steel seamless steel tubes for boilers and heat exchangers (GB13296-2007).

Dimensional accuracy requirements: The dimensional accuracy requirements will be very high. Compared with ordinary stainless steel pipes, its accuracy requirements will be more accurate.

Mechanical property requirements: precision steel pipes often have detailed requirements for their mechanical properties, such as how much tensile strength should be achieved, how much yield strength should be achieved, how much elongation should be achieved, and so on. What kind of anaerobic heat treatment to do.

There are also certain requirements for geometric tolerances, such as how much concentricity of inner and outer diameters should be achieved, how much straightness should be achieved, how much ovality of the inner circle should be achieved, and how much should the ovality of the outer diameter be achieved.

1. Quality management.

1.Each workshop should strictly implement the provisions of the "Procedure Document" on "quality responsibilities of all types of personnel at all levels", perform their own responsibilities and coordinate their work.

2.The key process is strictly controlled according to the provisions of the "Procedure Document", and the cause of the abnormal situation should be identified and eliminated in time, so that the quality is always in a stable and controlled state.

3.Conscientiously implement the "three inspections" system, the operator should self-inspect the products produced by himself, and only after passing the inspection can he be transferred to the next process, and the next process will inspect the products in the previous process, and the unqualified products have the right to refuse to receive. If a quality accident is found, the responsible person will not let it go, the cause of the accident will not be ruled out, and the preventive measures will not be formulated.

4.The workshop should be responsible for the quality of the products produced, so that unqualified materials are not put into production, and unqualified half-products are not converted.

5.Strictly divide the "three products" (qualified products, repaired products, and waste products) isolation area, so that the identification is obvious, the quantity is accurate, and the treatment is timely.

2. Process management.

1.Strictly implement the process regulations.

2.Job skills training for new workers and job change personnel, pass the examination and have the guidance of the master to operate, the production technology department from time to time to check the process discipline of the first situation.

3.Strictly implement the production according to the standards, according to the process and according to the drawings, and strictly abide by the process parameters and technical requirements specified in the drawings and process documents, and carry out inspections and records according to the regulations.

4.Raw materials, semi-finished products, spare parts, and self-inspection should be carried out after entering the workshop, and they can only be put into production if they meet the standards or have concession acceptance procedures, otherwise they shall not be put into production.

5.Strictly implement standards, drawings, process formulas, if you need to modify or change, you should apply, and after test identification, submitted to the production technology department for approval, the main can be used for production.

6.Rationalization suggestions, technical improvements, and new material applications must be tested, identified, and approved before they can be included in relevant technical and process documents before they can be used for production.

7.The newly made tooling should be inspected and tested to determine that there is no abnormality and the first product is qualified before it can be put into production.

8.In the tooling should be kept in good condition.

9.The production department should establish an inventory tooling account, handle the procedures for receiving, repairing and scrapping according to the regulations, and make various records.

10.Rational use of equipment, measuring tools, station equipment, to maintain accuracy and good technical condition.