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USACE / NAVFAC / AFCEC / NASA UFGS-23 21 13.00 20 (April 2006)
Change 2 - 11/19
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Preparing Activity: NAVFAC Replacing without change
UFGS-1518
5N (September 1999)
UNIFIED FACILITIES GUIDE SPECIFICATIONS
References are in agreement with UMRL dated October 2022
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SECTION TABLE OF CONTENTS
DIVISION 23 - HEATING, VENTILATING, AND AIR CONDITIONING (HVAC)
SECTION 23 21 13.00 20
LOW TEMPERATURE WATER (LTW) HEATING SYSTEM
04/06, CHG 2: 11/19
PART 1 GENERAL
1.1 REFERENCES
1.2 RELATED REQUIREMENTS
1.3 SYSTEM DESCRIPTION
1.3.1 Hot Water Heating System
1.4 SUBMITTALS
1.5 QUALITY ASSURANCE
1.5.1 Standard Commercial Product for Terminal Units
1.5.2 Welding
1.5.2.1 Report of Prior Installations
1.5.2.2 Welding Procedures
1.5.2.3 Welder's Qualifications
1.5.2.4 Identification of Welder's Work
1.5.2.5 Previous Qualifications
1.5.3 Brazing and Soldering
1.5.3.1 Brazing Procedure
1.5.3.2 Soldering, Soldering Preparation, and Procedures for Joints
1.5.4 Backflow Preventer Certification
1.6 SAFETY STANDARDS
1.6.1 Welding
1.6.2 Guards
PART 2 PRODUCTS
2.1 PIPE AND FITTINGS
2.1.1 Hot Water Heating Pipe (Supply and Return)
2.1.2 Fittings
2.1.2.1 Steel or Malleable Iron Pipe
2.1.2.2 Steel, Cast Iron, or Bronze
2.1.2.3 Fittings for Copper Tubing
2.1.3 Unions
2.1.3.1 Steel Pipe
2.1.3.2 Copper Tubing
SECTION 23 21 13.00 20 Page 1
