SECTION 15101

GENERAL PIPING REQUIREMENTS

PART 1 GENERAL

1.1	SUMMARY

A.	Includes But Not Limited To

1.	General piping installation procedures applicable to all piping systems.

B.	Related Sections

1.	Section 15051 - General Mechanical Requirements

PART 2 PRODUCTS

2.1	COMPONENTS

A.	Pipe And Pipe Fittings - Use domestic made pipe and pipe fittings on Project. Weld-O-Let and Screw-O-Let fittings are acceptable.

B.	Sleeves - Standard weight galvanized iron pipe, Schedule 40 PVC, or 14 gauge galvanized sheet metal two sizes larger than bare pipe or insulation on insulated pipe.

2.2	MANUFACTURED UNITS

A.	Valves - Valves of same type shall be of same manufacturer.

B.	Pipe Hangers

1.	Adjustable, malleable iron clevis type, swivel loop type, or swivel split ring type of a diameter adequate to support pipe size.

2.	Approved Manufacturers -

a.	Globe Strut

b.	B-Line Systems

c.	Grinnell

d.	Michigan Hanger Co

e.	Superstrut

C.	Di-Electric Unions

1.	Suitable for at least 175 PSIG WP at 250 deg F.

2.	Approved Manufacturers -

a.	EPCO

b.	Victaulic Co

c.	Watts Regulator Co

PART 3 EXECUTION

3.1	INSTALLATION

A.	Furnish and install complete system of piping, valved as indicated or as necessary to completely control entire apparatus.

1.	Pipe drawings are diagrammatic and indicate general location and connections. Piping may have to be offset, lowered, or raised as required or directed at site. This does not relieve this Division from responsibility for proper erection of systems of piping in every respect.

2.	Arrange piping to not interfere with removal of other equipment, ducts, or devices, or block access to doors, windows, or access openings. Provide accessible, ground joint unions in piping at connections to equipment.

3.	Install piping systems so they may be easily drained.

4.	Do not install piping in shear walls.

B.	Properly support piping and make adequate provisions for expansion, contraction, slope, and anchorage.

1.	Cut piping accurately for fabrication to measurements established at site and work into place without springing or forcing. Do not use pipe hooks, chains, or perforated metal for pipe support. Remove burr and cutting slag from pipes.

2.	Make changes in direction with proper fittings.

3.	Insulate hangers for copper pipe from piping by means of at least two layers of Scotch 33 plastic tape.

4.	Support metal piping at 8 feet on center maximum for pipe 1-1/4 inches or larger and 6 feet on center maximum for pipe 1-1/8 inch or less. Support thermoplastic pipe at 4 feet on center maximum. Provide support at each elbow. Install additional support as required.

5.	Except underground pipe, suspend piping from roof trusses or clamp to vertical walls using Unistrut and clamps. Laying of piping on any building element is not allowed.

6.	Expansion of Thermoplastic Pipe -

a.	Provide for expansion in every 30 feet of straight run.

b.	Provide 12 inch offset below roof line in each vent line penetrating roof.

C.	Make connections of dissimilar metals with di-electric unions. Do not use reducing bushings, street elbows, bull head tees, or close nipples.

D.	Provide sleeves around pipes passing through concrete or masonry floors, walls, partitions, or structural members. Do not place sleeves around soil, waste, vent, or roof drain lines passing through concrete floors on grade. Seal sleeves with specified sealants.

E.	Cap or plug open ends of pipes and equipment to keep dirt and other foreign materials out of system. Do not use plugs of rags, wool, cotton waste, or similar materials.

END OF SECTION