CN

News

Location： Home  /  News  /  Corporate news
Full Analysis of Chemical Flange PN Series Standards: Identification Details Revealed

2024-09-30

Full Analysis of Chemical Flange PN Series Standards: Identification Details Revealed

"HG20592-2009" is the standard number implemented by the flange. HG/T 20592-2009 here is the "PN series" standard in the chemical standard, while the "Class series" standard is HG/T 20615-2009. Due to the large number of flange standards, in order to facilitate identification, it can be remembered that the beginning of HG is the chemical standard, the beginning of GB is the national standard, the beginning of JB is the mechanical standard, the beginning of SH is the petrochemical standard, and the beginning of CB is the marine standard.

Flanged connection vs clamp connection: how to choose the best pipe connection method?

2024-09-30

Flanged connection vs clamp connection: how to choose the best pipe connection method?

1. The structure is complex but stable: the flange is connected through two pipes or equipment with flanges, and then the flange is bolted to form a whole. The structure is relatively complex, but the connection is more stable. 2. Excellent sealing performance: the sealing gasket between flanges can effectively prevent media leakage and ensure the safety and stability of the connection. The materials of flange gaskets will also be selected according to the pressure level, from low-pressure asbestos pads, high-pressure asbestos pads and tetrafluoro pads to metal pads.

Flange sealing and leakage sealing treatment method

2024-09-30

Flange sealing and leakage sealing treatment method

There are many factors that affect the flange sealing. Mainly: bolt prestressing force; sealing surface type; gasket performance; flange stiffness; operating conditions. For decades, the ANSI flange designed by the National Standards Institute of the United States has provided a suitable sealing technology for the oil and gas industry, and has been very effective. However, as the demand of the oil and gas industry has changed, the defects of the ANSI flange are constantly exposed. Cost-effectiveness principles, environmental protection, and optimal health and safety assurance are the three major issues facing operators and contractors in the 21st century, so people began to consider new flange sealing methods.

How to identify and select flange gaskets!

2024-09-30

How to identify and select flange gaskets!

The gasket is the main seal of the flange connection, so the correct selection of gasket is also the key to ensuring that the flange connection does not leak. According to the different materials, gaskets can be divided into many types. In addition to the type of gasket, the identification and selection of the gasket are also very important!

Examples of flange marks and marks

2024-09-30

Examples of flange marks and marks

The flange should be marked according to the nominal diameter, nominal pressure, sealing surface form code, the series code of the steel pipe used (the code of the metric pipe is "Series 2", and the imperial pipe is not marked) and the standard number. Marking example: convex welded steel pipe flange with nominal diameter of 80mm and nominal pressure of 4.0MPa (25bar) (with meter tube)

Why do the production of flanges and valves require heat treatment?

2024-09-30

Why do the production of flanges and valves require heat treatment?

Ordinary flanges and valves generally do not require heat treatment. But sometimes, when they have requirements for strength, hardness, rust resistance, etc., heat treatment is required. Heat treatment refers to a metal heat processing process in which the material is heated, insulated and cooled to obtain the expected structure and performance in the solid state. The valve is a control component in the fluid conveying system, which has the functions of shut-off, regulating, guiding, preventing countercurrent, regulating pressure, diverting or overflowing.

 
 
 
Home
Products
Contact