News

Specification parameters
Size matching: Clearly define the required stainless steel reducer large end diameter, small end diameter, wall thickness and length and other dimensional parameters, to be accurately matched with the actual use of the piping system, to avoid problems such as failure to install or impact on fluid transportation. For example, when connecting pipes of different diameters, the diameter of the large and small ends of the reducer must be perfectly matched with the diameter of the corresponding pipe.
Tolerance range: Understand whether the tolerance range of the product size is in line with the relevant standards and engineering requirements. Generally speaking, high-quality reducer size tolerance control is more stringent, to better ensure the installation accuracy and performance. Such as national standards for different specifications of the size of the reducer tolerance are clearly defined, should be purchased on the basis of acceptance.
Material characteristics
Material type: common stainless steel materials are 304, 316L, etc. Different materials have different corrosion resistance, high temperature resistance and mechanical properties. For example, 304 stainless steel has good corrosion resistance and versatility, suitable for general industrial and civil environments; while 316L stainless steel is better in terms of pitting and corrosion resistance, commonly used in seawater and other strong corrosive environments. Buyers should choose the suitable material according to the usage environment and medium.
Material certification: Ask the supplier to provide material certification documents, such as quality inspection report, chemical composition analysis table, etc., to verify that the material of the purchased reducer meets the requirements. Ensure that the information on the material certification documents is consistent with the actual product to prevent substandard products.
Manufacturing process
Molding process: common molding processes are hot pressing, cold drawing, welding, etc.. Different processes have a certain impact on the quality and performance of the product. Hot press forming reducer has higher dimensional accuracy and uniform internal organization; cold drawn forming reducer has good surface finish and high dimensional accuracy; welded reducer needs to pay attention to the quality of weld seam. Buyers can choose the products with suitable molding process according to the actual needs and requirements for product performance.
Welding quality: If it is a welded reducer, focus on the quality of the weld seam. The weld seam should be uniform, smooth and free of cracks, pores, slag and other defects. Suppliers can be asked to provide nondestructive testing reports of welds, such as ray testing, ultrasonic testing reports, etc., to ensure that the internal quality of welds meets the standards.
Appearance and quality
Appearance inspection: carefully observe the appearance of the reducer, the surface should be smooth, without obvious scratches, dents, sand holes and other defects. The roughness of the surface should meet the requirements of the relevant standards. Good surface quality not only affects aesthetics, but also reduces the adhesion of corrosive media and improves service life.
Quality certification: check whether the product has the relevant quality certification, such as ISO9001 quality management system certification, pressure piping components manufacturing license. These certifications are a kind of proof that the product quality meets the standard, which can increase the reliability and credibility of the product.
Supplier services
Reputation and reputation: Through network evaluation, industry reputation, customer recommendations, etc., to understand the supplier's reputation and after-sales service quality. Choose suppliers with good reputation and perfect after-sales service, so that problems encountered after purchase can be solved in a timely and effective manner.
After-sales service: Define the supplier's after-sales service content, including product quality warranty period, return and exchange policy, technical support and so on. For example, if there are quality problems during the warranty period, the supplier should be responsible for free repair or replacement; for complex installation and use problems, the supplier should be able to provide professional technical guidance.