How To Select The Proper Lining

The rubber lining types that are covered in this guideline are: 

 SOFT NATURAL RUBBERS.
 EBONITES (HARD RUBBERS). 
 NEOPRENE.
 HYPALON. 
 EPDM. 
 BUTYL. 
 CHLOROBUTYL. 
 NITRILE.

How To Select The Proper Lining

A careful analysis of all the details of the service conditions must be identified before selecting the right lining material. The following data must be taken into consideration:

 Composition and concentration of the chemical.
 Impurities, if any.

 Temperature, maximum, minimum and time cycle.
 Pressure or vacuum or alternating cycle.
 If abrasives present, percentage, size and velocity.
 Size and shape of equipment or tank to be lined.
 Indoor or outdoor service.

The information given in Tables 1 and 2 must be used by SABIC and its contractors when designing, specifying and installing chemical and/or abrasion resistant rubber linings.

Table 1. Characteristics and typical uses of the different types of rubber linings

Chemical Resistance Chart for Rubbers

SYMBOLS:

E = EXCELLENT, S = SATISFACTORY, NR = NOT RECOMMENDED Soft Natural Rubber (NR); Nitrile (NBR); Neoprene (CR); Butyl (IIR); Chlorobutyl (CIIR); Hypalon (CSM)

 Vessel Fabrication

 All welded joints shall be continuous and ground smooth to a minimum of 1/8″ radius for convex corners and to a minimum of 1/4″ radius for concave corners.
 All surfaces shall be free of weld splatter of foreign material.
 Voids, gaps, holes, pockets or undercut welds are not permitted.