Cooling towers, condenser water pumps, condenser water treatment systems,
condenser water piping, fittings, valves and accessories shall be in
accordance with Sections 15645A COOLING TOWER and 15181 CHILLED,
CHILLED-HOT, AND CONDENSER WATER PIPING SYSTEMS.
2.18
DRAIN AND MISCELLANEOUS PIPING
Piping, fittings, valves and accessories for drain and miscellaneous
services shall be in accordance with Section 15400A PLUMBING, GENERAL
PURPOSE.
2.19
PIPING AND FITTINGS, FLUOROCARBONS
Piping, valves, fittings, and accessories shall conform to the requirements
of ASHRAE 15and ASME B31.5, except as specified.
2.19.1
Steel Pipe
Steel pipe for fluorocarbon service shall conform to ASTM A 53/A 53M,
Schedule 40, Type E or S, Grades A or B. Type F pipe shall not be used.
2.19.2
Steel Pipe Joints and Fittings
Joints and fittings shall be steel butt-welding, socket-welding, or
malleable iron threaded type. Pipe shall be welded except that joints on
lines 50 mm 2 inches and smaller may be threaded. Threads shall be tapered
type conforming to ASME B1.20.1. The malleable iron threaded type fitting
shall be of a weight corresponding to adjacent pipe. Flanges and flange
faces of fittings shall be tongue-and-groove type with gaskets suitable for
the refrigerant used; size 25 mm 1 inch and smaller shall be oval, two-bolt
type; size above 25 mm 1 inch, up to and including 100 mm 4 inch, shall be
square four-bolt type; and sizes over 100 mm 4 inch shall be round.
2.19.3
Steel Tubing
Steel tubing for refrigeration service shall be in accordance with ASTM A
334/A 334M, Grade 1. Tubing with a nominal diameter of 10 mm 3/8 inch or
13 mm 1/2 inch shall have a wall thickness of 1.22 mm 0.049 inches. Tubing
with a nominal diameter of 19 mm 3/4 inch through 50 mm 2 inches shall have
a wall thickness of 1.62 mm 0.065 inches. Tubing with a nominal diameter
of 65 through 100 mm 2-1/2 through 4 inches shall have a wall thickness of
2.4 mm 0.095 inches. Steel tubing shall be cold-rolled, electric-forged,
welded-steel. One end of the tubing shall be provided with a socket.
Steel tubing shall be cleaned, dehydrated, and capped.
2.19.4
Steel Tubing Joints and Fittings
Joints and fittings shall be socket type provided by the steel tubing
manufacturer.
2.19.5
Copper Tubing
Copper tubing shall conform to ASTM B 280 annealed or hard drawn as
required. Copper tubing shall be soft annealed where bending is required
and hard drawn where no bending is required. Soft annealed copper tubing
shall not be used in sizes larger than 35 mm 1-3/8 inches. Joints shall be
brazed except that joints on lines 22 mm 7/8 inch and smaller may be flared.
SECTION 15652A
Page 31
Previous Page
