ASME B31.3 Nonmetallic Process Piping

Nonmetallic Piping

• General
• Design, Fabrication, and Installation for
• Thermoplastics
• Reinforced thermosetting resins
• Reinforced concrete
• Vitrified clay
• Borosilicate glass
• Piping lined with nonmetals
• Limitations

Trend toward the use of nonmetals is increasing

Nonmetals are used when the metallic alternative is judged to be too expensive

Allowances for variations of pressure and temperature described are not permitted for nonmetallic piping

Increased allowable stresses for occasional loads are not permitted

Thermoplastics

Materials that can be repeatedly softened by heating and hardened by cooling

• Pipe is extruded
• Fittings are usually injection molded, but sometimes fabricated
• Valve parts are usually injection molded

Commonly used thermoplastics

ABS - Acrylonitrile-butadiene-styrene
CPVC - Chlorinated polyvinyl chloride
FEP - Perfluoro ethylene propylene
(HD)PE (High density) polyethylene
PFA - Polyperfluoroalkoxy Alkane
PP - Polypropylene
PVC - Polyvinyl chloride
PVDF - Polyvinylidene fluoride

FOR MORE INFO, SEE THE EMBEDDED PDF. GIVE IT A MINUTE TO LOAD.