Structural design of stuffing box for external packing function heat exchanger

There are detailed design regulations in 5.16 of GB151-1999.

Thanks for the advice. 5.16 gives a structural reference and some dimensions, but the usage conditions only have one parameter: pressure. I wonder if this structure has any requirements for temperature?

Check the use temperature of the filler for reference. The filler should be selected according to the medium, temperature and pressure. Commonly used materials include the following:: a) Oil-impregnated asbestos rope, suitable for valves with steam temperature 450 degrees and pressure below 6.0MPa. b) Rubber slate rope, suitable for valves with steam temperature 450 degrees and pressure below 6.0MPa. C) Graphite slate rope. The slate rope is infiltrated with graphite powder. It can be used at temperatures above 450 degrees and the pressure can reach 16.0MPa. It is generally used on high-pressure steam. d) Polytetrafluoroethylene, which is a filler that is currently widely used, especially in corrosive media. The temperature must not exceed 200 degrees. It is generally made by pressing or bar turning. e) Corrugated filler is composed of multiple layers of concentric metal corrugated sheets with a square cross-section, which is pressed and formed in a mold. Each corrugated valley is filled with asbestos threads spun from asbestos fibers, and the outer surface of the filler ring is coated with scaly graphite. The metal sheet of corrugated filler can be composed of stainless steel, copper, and lead, which are suitable for various temperature levels below 600 degrees. It is a new type of filler currently recommended. f) Flexible graphite is made of natural graphite after special chemical treatment and heat treatment. It maintains the good corrosion resistance, high temperature resistance, high pressure resistance, radiation resistance, and excellent thermal and electrical conductivity of natural graphite. The service temperature range of flexible graphite is: The operating temperature in non-oxidizing media is -200 to 1600 degrees ； In oxidizing media (general working conditions) -200~700 degrees ； In strong oxidizing media, the temperature is less than or equal to 400 degrees. 　　Flexible graphite has good corrosion resistance, but it cannot be used in nitric acid with a concentration greater than 95%, sulfuric acid + nitric acid with a concentration greater than 96%, and sulfuric acid with a concentration greater than 95%.

HG 21537-92 stuffing box carbon steel stuffing box

The interpretation of the GB151 standard includes the calculation process of the tube sheet, which can be said to be a little comfort. My graduation project is a stuffed function heat exchanger! Very tragic