I will propose to look ; ANSI/AWWA C 219 Bolted Mechanical Sleeve Type Couplings ,AWWA C207-13 Steel Pipe Flanges and
VJ dismantling joint data sheet file:
///C:/Users/user/Downloads/Dismantling-Joints-4”-40”AWWA-VJ-DS-0320-P114-115.pdf
and combine them..
The spec should include=
1.0 SCOPE
2.0 DEFINITIONS
3.0 REGULATIONS CODES AND STANDARDS
4.0 OTHER REFERENCE DOCUMENTS
5.0 TECHNICAL REQUIREMENTS ( Operating Conditions, Design Service Life, Design calculations and drawings, Design Pressure, Materials of Construction , Manufacture , Inspection and Testing ( Visual Inspection and Dimensional Check , Non-destructive inspection ,Pressure Tests),Coating and Lining Tests ,Test Records
6.0 Packing for Shipment and Storage
7.0 DOCUMENTATION