Janus FM-200 Sv Series - Installing Discharge Piping; Threaded Pipe; Threaded Fittings

Page: 54
FM-200® OPERATION, DESIGN, & SERVICE MANUAL
Revision F
Document # DOC102
Issued: February 1, 2009
Revised: 11-Nov-2011
40YE
Section 4 System Installation
4.1.2 Installing Discharge Piping
Discharge pipe, ttings, brackets, hangers, and are not normally included in the scope of Janus Fire Systems®.
Materials should be new and free from rust and corrosion. Pipe size, schedule, routing, reductions, changes in
elevations, etc must be in accordance with the drawings and in accordance with calculations performed using
the Janus Design Suite® software. Any deviations in routing or tting quantities must be coordinated and
veried by the system designer prior to implementing changes.
Pipe must comply with NFPA 2001 and be either Schedule 40 or 80. Pipe can be of any of the following
fabrication classications.
Seamless - Round pipe without a longitudinal seam.
Electric Resistance Welded (ERW) - Pipe with a longitudinal joint where fusion of the joint is produced by
the heat obtained from the resistance to the ow of electric current.
Furnace Butt Welded Pipe (Welded Pipe) - Pipe fabricated by mechanical pressure developed by drawing the
furnace heated metal through a conical die that serves to form and weld the tubular shape.
Refer to Table 4.1.2 for acceptable pipe grades.
Cast iron pipe, steel pipe conforming to ASTM A-120, aluminum pipe, or non-metallic pipe shall not be used.
4.1.2.1 Threaded Pipe
At a minimum threaded pipe joints must be reamed free of burrs and obstructions. Any lubricants used in
the threading process must be cleaned from the ends of the pipe to reduce the chance of cutting lubricant
or shavings entering the nozzle orices or being deposited in ceilings or equipment. readed joints must
conform to ANSI B1-20.1. Pipe sections should be swabbed with appropriate nonammable degreasing
solvent to remove any traces of preservatives or lubricant.
Prior to t up dry compressed air or nitrogen can be used to “blow out” any debris left in the pipe bore
during the cleaning process.
e exposed threaded joints must be wrapped with polytetrauoroethylene (PTFE or Teon tape) or
anaerobic PTFE-based paste. Both are used as a lubricant that allows threads to mate more readily and lls
any variances in the thread surfaces.
4.1.2.2 Threaded Fittings
readed ttings must comply with NFPA 2001 and be at a minimum class 300 malleable iron, class 300
ductile iron, or have a minimum rated working pressure of 416 psi (28.7 bar) at 70°F (21.1°C).
Table 4.1.2 Acceptable Pipe Grades
Seamless Grade A-53 A or B, Grade A-106 A or B or C
Electric Resistance Welded (ERW) Grade A-53 A or B
Furnace Welded Grade A-53 F - 3/8" (10 mm) to 4" (100 mm) Pipe Sizes