5 QUALITY ASSURANCE A. Steel Support Welding: Qualify processes and operators according to AWS D1.1, "Structural Welding Code--Steel." B. Steel Pipe Welding: Qualify processes and operators according to ASME Boiler and Pressure Vessel Code: Section IX, "Welding and Brazing Qualifications." 1. Comply with provisions in ASME B31 Series, "Code for Pressure Piping." 2. Certify that each welder has passed AWS qualification tests for welding processes involved and that certification is current. C. Electrical Characteristics for Mechanical Equipment: Equipment of higher electrical characteristics may be furnished provided such proposed equipment is approved in writing and connecting electrical services, circuit breakers, and conduit sizes are appropriately modified. If minimum energy ratings or efficiencies are specified, equipment shall comply with requirements. 1.6 DELIVERY, STORAGE, AND HANDLING A. Deliver pipes and tubes with factory-applied end caps. Maintain end caps through shipping, storage, and handling to prevent pipe end damage and to prevent entrance of dirt, debris, and moisture. B. Store plastic pipes protected from direct sunlight. Support to prevent sagging and bending. 1.7 COORDINATION A. Arrange for pipe spaces, chases, slots, and openings in building structure during progress of construction, to allow for mechanical installations. B. Coordinate installation of required supporting devices and set sleeves in poured-in-place concrete and other structural components as they are constructed. C. Coordinate requirements for access panels and doors for mechanical items requiring access that are concealed behind finished surfaces. Access panels and doors are specified in Section "Access Doors and Frames." PART 2 - PRODUCTS 2.1 MANUFACTURERS A. In other Part 2 articles where subparagraph titles below introduce lists, the following requirements apply for product selection: 1. Manufacturers: Subject to compliance with requirements, provide products by the manufacturers specified. 2.2 PIPE, TUBE, AND FITTINGS A. Refer to individual Division 21 and 23 piping Sections for pipe, tube, and fitting materials and joining methods. B. Pipe Threads: ASME B1.20.1 for factory-threaded pipe and pipe fittings. 2.3 JOINING MATERIALS A. Refer to individual Division 22 and 23 piping Sections for special joining materials not listed below. B. Pipe-Flange Gasket Materials: Suitable for chemical and thermal conditions of piping system contents. 1. ASME B16.21, nonmetallic, flat, asbestos-free, 1/8-inch (3.2-mm) maximum thickness unless thickness or specific material is indicated. a. Full-Face Type: For flat-face, Class 125, cast-iron and cast-bronze flanges. b. Narrow-Face Type: For raised-face, Class 250, cast-iron and steel flanges.
