Common use of Flange Adaptor Backing Rings Clause in Contracts

Flange Adaptor Backing Rings. a. Epoxy Coated DR-7 Backing Rings shall be used for 2”-“. b. Shall comply with AWWA C901 IPS pipe diameters and ASME 125/150. i. The Contractor shall verify bolt patterns for Backing Rings and the mating flanges. c. Shall consist of convoluted ductile iron (ASTM A536 65-45-12). d. Shall be fusion-bonded epoxy coated per AWWA C116, except NSF-61 certification is not required. e. Bolting materials shall conform to Flange Bolting as specified by the District.

Flange Adaptor Backing Rings. a. Epoxy Coated DR-7 DR‐7 Backing Rings shall be used for 2”-2”‐“. b. Shall comply with AWWA C901 IPS pipe diameters and ASME 125/150. i. The Contractor shall verify bolt patterns for Backing Rings and the mating flanges. c. Shall consist of convoluted ductile iron (ASTM A536 65-45-1265‐45‐12). d. Shall be fusion-bonded fusion‐bonded epoxy coated per AWWA C116, except NSF-61 NSF‐61 certification is not required. e. Bolting materials shall conform to Flange Bolting as specified by the District.

Flange Adaptor Backing Rings. a. 1. Epoxy Coated DR-7 Backing Rings shall be used for 2”-“. b. 2. Shall comply with AWWA C901 IPS pipe diameters and ASME 125/150. i. a. The Contractor shall verify bolt patterns for Backing Rings and the mating flanges. c. 3. Shall consist of convoluted ductile iron (ASTM A536 65-45-12). d. 4. Shall be fusion-bonded epoxy coated per AWWA C116, except NSF-61 NSF- 61 certification is not required. e. 5. Bolting materials shall conform to Flange Bolting as specified by the District.

Flange Adaptor Backing Rings. a. 1. Epoxy Coated DR-7 DR‐7 Backing Rings shall be used for 2”-2”‐“. b. 2. Shall comply with AWWA C901 IPS pipe diameters and ASME 125/150. i. a. The Contractor shall verify bolt patterns for Backing Rings and the mating flanges. c. 3. Shall consist of convoluted ductile iron (ASTM A536 65-45-1265‐45‐12). d. 4. Shall be fusion-bonded fusion‐bonded epoxy coated per AWWA C116, except NSF-61 NSF‐ 61 certification is not required. e. 5. Bolting materials shall conform to Flange Bolting as specified by the District.