2025-10-05

The precision processing flow of large-diameter flat welding flanges

The finishing process of large-diameter flat welding flanges is a complex and meticulous procedure, mainly including the following key steps: I. Raw Material Preparation Material selection: High-quality thick steel plates are chosen as raw materials. Materials with good mechanical properties and corrosion resistance, such as carbon steel, stainless steel or alloy steel, are usually selected. Inspection: Conduct strict inspections on raw materials, including non-destructive testing methods such as ultrasonic flaw detection, to ensure that the raw materials have no defects such as delamination and slag inclusion. Ii. Preliminary Processing Cutting: According to the size requirements of the flange, high-precision cutting equipment is used to cut the raw materials to obtain flange blanks that meet the requirements. Pre-treatment: Pre-treatment is carried out on the cut flange blanks, such as deburring and rust removal, to enhance the quality and efficiency of subsequent processing. Iii. Forming Processing

2025-10-05

How to distinguish the authenticity of stainless steel flanges?

The authenticity of stainless steel flanges can be comprehensively judged through various methods. The following is the specific operation and principle analysis: 1、 Chemical reagent detection method (rapid preliminary judgment) 1. Nitric acid point experiment Principle: Stainless steel has corrosion resistance to concentrated nitric acid and dilute nitric acid, while ordinary carbon steel or low-alloy steel will be corroded. Operation: Dip a cotton swab into concentrated nitric acid (or dilute to an appropriate concentration) and drop it onto the surface of the flange. If there are no obvious signs of corrosion, it is stainless steel; If it quickly turns black or bubbles, it may be a counterfeit product. Attention: It is necessary to operate in a well ventilated area to avoid skin contact.

2025-10-05

What are the precautions during the installation process of the compression flange?

During the installation process of the compression flange, it is necessary to strictly control the details to ensure confidentiality, safety, and service life. The following are key precautions during the installation process, classified and explained according to the operation stage: 1、 Preparation stage before installation Material and specification matching Medium compatibility: Select the material of flanges, gaskets, and bolts based on the conveying medium (such as corrosive liquids, high-temperature steam, gases, etc.). For example, strong acid media require Hastelloy or PTFE gaskets, and high-temperature working conditions require heat-resistant steel bolts. Pressure rating matching: The pressure rating of flanges, gaskets, and pipelines should be consistent, avoiding