ALL MALLEABLE THREADED FITTINGS MANUFACTURED FOR AND BY SIGMA PIPING PRODUCTS CONFORM TO, COMPLY WITH, AND ARE MANUFACTURED TO THE FOLLOWING STANDARDS:

• ASTM A 197- Standard Spec for Cupola Malleable Iron
• ASTM A 153- Standard Spec for Zinc Coating (Hot Dip) on Iron and Steel
• ANSI B 16.3- Malleable Iron Threaded Fittings Classes 150
• ANSI/ASME B1.20.1- Pipe Threads, General Purpose (inch) NPT

UL LISTED: HHXX.EX9159 IAPMO CERT.













ALL DUCTILE IRONS MANUFACTURED FOR AND BY SIGMA PIPING PRODUCTS CONFORM TO, COMPLY WITH, AND ARE MANUFACTURED TO THE FOLLOWING STANDARDS:

• ASTM A 536- Grade 65-45-12
• ANSI B 16.3- Malleable Iron Threaded Fittings Classes 150
• ANSI/ASME B1.20.1- Pipe Threads, General Purpose (inch) NPT

cULus Listed: HHXX7.EX9159







ALL CAST IRONS MANUFACTURED FOR AND BY SIGMA PIPING PRODUCTS CONFORM TO, COMPLY WITH, AND ARE MANUFACTURED TO THE FOLLOWING STANDARDS:

• ASTM A126- Class B Standard Spec for Cupola Cast Iron
• ANSI B 16.4- Cast Iron Threaded Fittings Classes 125
• ANSI/ASME B1.20.1- Pipe Threads, General Purpose (inch) NPT

ALL STEEL PIPE NIPPLES MANUFACTURED FOR AND BY SIGMA PIPING PRODUCTS CONFORM TO, COMPLY WITH, AND ARE MANUFACTURED TO THE FOLLOWING STANDARDS:

• ASTM A 53- Standard Spec for Pipe, Steel, Black and Hot-Dipped, Zinc Coated, Welded and Seamless
• ANSI/ASME B1.20.1- Pipe Threads, General Purpose (inch) NPT

ALL STEEL Uni-Tee MANUFACTURED FOR AND BY SIGMA PIPING PRODUCTS CONFORM TO, COMPLY WITH, AND ARE MANUFACTURED TO THE FOLLOWING STANDARDS:

• ASTM A 153- Standard Spec for Zinc Coating (Hot Dip) on Iron and Steel
• ANSI/ASME B1.20.1- Pipe Threads, General Purpose (inch) NPT
• ASTM A 536- Grade 65-45-12
• Gasket Material EPDM