scope:

DESCRIPTION

A. Field applied insulation for thermal efficiency and condensation control for

1. HVAC piping, ductwork and equipment.

//2. Boiler plant mechanical systems including burner fuel oil storage and handling facilities but excluding outside steam distribution.//

//3. Re-insulation of HVAC piping, ductwork and equipment, plumbing piping and equipment and boiler plant piping, breeching and stacks and equipment after asbestos abatement.//

B. Definitions

1. ASJ: All service jacket, white finish facing or jacket.

2. Air conditioned space: Space having air temperature and/or humidity controlled by mechanical equipment.

3. Cold: Equipment, ductwork or piping handling media at design temperature of 16 degrees C (60 degrees F) or below.

4. Concealed: Ductwork and piping above ceilings and in chases, //interstitial space, // and pipe spaces.

5. Exposed: Piping, ductwork, and equipment exposed to view in finished areas including mechanical//, Boiler Plant// and electrical equipment rooms or exposed to outdoor weather. Attics and crawl spaces where air handling units are located are considered to be mechanical rooms. Shafts, chases, //interstitial spaces, // unfinished attics, crawl spaces and pipe basements are not considered finished areas.

6. FSK: Foil-scrim-kraft facing.

7. Hot: HVAC Ductwork handling air at design temperature above 16 degrees C (60 degrees F);HVAC equipment or piping handling media above 41 degrees C (105 degrees F)//; Boiler Plant breechings and stack temperature range 150-370 degrees C(300-700 degrees F) and piping media and equipment 32 to 230 degrees C(90 to 450 degrees F)//.

8. Density: kg/m3 - kilograms per cubic meter (Pcf - pounds per cubic foot).

9. Runouts: Branch pipe connections up to 25-mm (one-inch) nominal size to fan coil units or reheat coils for terminal units.

10. Thermal conductance: Heat flow rate through materials.

a. Flat surface: Watt per square meter (BTU per hour per square foot).

b. Pipe or Cylinder: Watt per square meter (BTU per hour per linear foot).

11. Thermal Conductivity (k): Watt per meter, per degree C (BTU per inch thickness, per hour, per square foot, per degree F temperature difference).

12. Vapor Retarder (Vapor Barrier): A material which retards the transmission (migration) of water vapor. Performance of the vapor retarder is rated in terms of permeance (perms). For the purpose of this specification, vapor retarders shall have a maximum published permeance of 0.1 perms and vapor barriers shall have a maximum published permeance of 0.001 perms.

13. HPS: High pressure steam (415 kPa [60 psig] and above).

14. HPR: High pressure steam condensate return.

15. MPS: Medium pressure steam (110 kPa [16 psig] thru 414 kPa [59 psig].

16. MPR: Medium pressure steam condensate return.

17. LPS: Low pressure steam (103 kPa [15 psig] and below).

18. LPR: Low pressure steam condensate gravity return.

19. PC: Pumped condensate.

20. HWH: Hot water heating supply.

21. HWHR: Hot water heating return.

22. GH: Hot glycol-water heating supply.

23. GHR: Hot glycol-water heating return.

24. FWPD: Feedwater pump discharge.

25. FWPS: Feedwater pump suction.

26. CTPD: Condensate transfer pump discharge.

27. CTPS: Condensate transfer pump suction.

28. VR: Vacuum condensate return.

29. CPD: Condensate pump discharge.

30. R: Pump recirculation.

31. FOS: Fuel oil supply.

32. FOR: Fuel oil return.

33. CW: Cold water.

34. SW: Soft water.

35. HW: Hot water.

36. CH: Chilled water supply.

37. CHR: Chilled water return.

38. GC: Chilled glycol-water supply.

39. GCR: Chilled glycol-water return.

40. RS: Refrigerant suction.

41. PVDC: Polyvinylidene chloride vapor retarder jacketing, white.