Type: RD814

Specification: monel close jinbo tooth inner loop, 316 stainless steel outer ring

Usage: it is specially designed for the development of hydrofluoric acid system sealing spiral wound gasket

Manufacturer: Shanghai to much

Product description: in recent years, oil refining industry because seriously more and more used in refinery process as a result of security problems hydrofluoric acid, hydrofluoric acid is used in called "alkylating" process in the refining process, generate high quality liquefied petroleum gas (LPG), but it is a dangerous, highly corrosive medium, once the leak will form and cause huge gas clouds disasters and accidents. Although we realize its harm, but in the past five years, some big oil refining enterprise or leaking accident occurred many hydrofluoric acid. Hydrofluoric acid is petroleum refining process indispensable medium, but it gives production process safety also brought challenges.

For many years, the corrosion caused by flange hydrofluoric acid in chemical enterprises is very common phenomena, especially the repair, replacement cost caused quite costly. Pointed to overhaul of the erosion of thick plans often cutting small flange replacement, large diameter flange for sealant, repair and machined in the scene, usually on the system maintenance and replacement and repair the flange proportion not more than 25%. The traditional sealing solutions have not meet the demand, therefore, my company development research out, especially for hydrofluoric acid system of sealing problem with double seal characteristics of special spiral wound gasket, change traditional gasket can't afford the characteristics of inner sealing function, specific can seek advice I company.

Flange seal face roughness

For the metal winding gasket seal flange surface roughness of the requirements, processing for 3.2 ~ 6.3 apms m between, we call it smooth plane.

Order guidelines

When ordering please specify:

(1) standard

(2) the nominal diameter

(3) the nominal pressure

(4) seal face type

Will5 structure types

6 used in non-standard flange, please provide drawings or designated size and thickness

HF systemspecificmetal gasket is spiral