SPEC 23 24 00 - HYDRONIC PIPE CLEANING AND FLUSHING PROCEDURES.pdf

LEJUNEMASTERS

PUBLI C WORKS DI VI SI ON CLGS- 23 24 00

MARI NE CORPS BASE August 2010 CAMP LEJEUNE, NORTH CAROLI NA - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

GUI DE SPECI FI CATI ON

SECTION 23 24 00

HYDRONIC PIPE CLEANING AND FLUSHING PROCEDURES

08/10

PART 1 GENERAL

1.1 PERFORMANCE REQUIREMENTS

Cleaning and flushing shall remove organic soil, hydrocarbons, flux, pipe mill varnish, pipe compounds, iron oxide, and like deleterious substances. Removal of tightly adherent mill scale is not required.

1.2 DELIVERY, STORAGE, AND HANDLING

Handle and store detergent to protect equipment, environment and persons.

Store detergent according to manufacturer's recommendations.

1.3 ENVIRONMENTAL REQUIREMENTS

All chemicals shall be acceptable for discharge into sanitary sewer.

1.4 SUBMITTALS

NOTE: Revi ew Submi t t al Descr i pt i on ( SD) def i ni t i ons i n Sect i on 01 33 00 SUBMI TTAL PROCEDURES and edi t t he f ol l owi ng l i s t t o r ef l ect onl y t he submi t t al s r equi r ed f or t he pr oj ect .

Submit the following in accordance with Section 01 33 00 SUBMITTAL

PROCEDURES:

NOTE: Ref er t o t he par agr aph above ent i t l ed " Phasi ng of Wor k" . I f t hi s par agr aph appl i es t o t he const r uct i on cont r act , modi f y t he ent i r e " SUBMI TTALS" par agr aph by phasi ng ( maybe by r epeat i ng t he var i ous submi t t al s f or each phase) t o f aci l i t at e t he submi t t al pr ocess.

SD-03 Product Data

Cleaning Detergent

Water Treatment Chemicals and Chemical Supplier

PART 2 PRODUCTS

2.1 MATERIALS

The cleaning compound/ detergent shall be an alkaline phosphate or

SECTION 23 24 00 Page 1 non-phosphate detergent/surfactant/specific to remove organic soil, hydrocarbons, flux, pipe mill varnish, pipe compounds, iron oxide, and like deleterious substances, with or without inhibitor, suitable for system wetted metals without deleterious effects.

Cleaning compound/detergent shall not contain corrosion inhibitors such as sodium nitrite, molybdate, etc. The only corrosion inhibitor that may be used in conjunction with detergent is sodium sulfite (an oxygen scavenger).

Suggested detergent is trisodium phosphate.

Sodium sulfite, sodium lauroly sarcosinate, and dipotossium phosphate are used for water treatment .

PART 3 EXECUTION

3.1 PROTECTION

Do not exceed service factor amperage on pump motor.

3.1.1 Special Techniques

a. Use existing steam heating system to maintain a water temperature of 120F.

b. Close terminal unit service valves and open bypass valve.

Flushing bypass should connect upstream of the terminal unit supply service valve and downstream of the return service valve.

If necessary, provide temporary piping or hose to bypass terminal unit. Remove any component which may be damaged. In lieu of providing a bypass, three-way valves may be driven 100 percent to bypass. If three-way valves are utilized, do not close service valves.

c. Fill system with water and detergent solution to manufacture's specified water/detergent concentration, heat to 120F. Test both systems to determine system volume using fluorescent dye and fluorometric analysis.

d. Operate system pump, hot water pump and circulate solution for a minimum of 48 hrs, while maintaining 120 F. From bottom of air/solids separator, bleed water as necessary while filling system thru standard fill station ensuring to maintain the manufacturer's specified water/detergent concentration. Modulate drain to maintain system pressure. Do not exceed service factor amperage on pump motor. Throttle discharge valve as necessary.

The pump start up strainer shall remain in place. Periodically clean the pump strainer. Also, periodically check and clean terminal unit strainers during the 48 hours of cleaning.

e. Open terminal device service valves, three-way valves, and close bypass valves. Flush each terminal device. Ensure to clean all strainers before opening terminal device service valves. Repeat "Step d" for the terminal devices for a minimum of 48 hour.

f. Drain system and thoroughly flush with fresh water. Demonstrate to Government that system water runs clear. Coordinate with Construction Manager to provide sample water opacity.

SECTION 23 24 00 Page 2

g. Clean all strainers. Remove pump startup strainer.

h. The water shall be treated to the following chemical parameters:

Sodium sulfite: 30-100 ppm Sodium lauroyl sarcosinate: 30-100 ppm pH: 8.5 - 9.5 (use Dipotassium Phosphate as pH buffer)

The water chemical levels shall be retested in one day, one week and four weeks following initial treatment. If the chemical levels are not within the range specified above, additional treatment shall be conducted to bring the levels within range.

Prepare a report documenting the water system volume, pH, and sulfite concentration levels for the initial treatment and the subsequent three retests and necessary treatment. Submit report to government contracting officer and the Camp Lejeune mechanical design branch.

Provide material safety data sheets (MSDS) for treatment chemicals and permanently locate a copy in each mechanical room.

Provide one plastic sign no smaller than 12"x12" square with engraved lettering ½" in height. Sign shall be located in the mechanical room. It shall be hung on the wall in an area with an unobstructed view and near the respective chemical shot feeder.

The sign shall state the respective system volume (determined from testing and verified by hand calculations) and the following:

"This hydronic system is treated to the following chemical parameters:

Sodium sulfite: 30-100 ppm Sodium lauroyl sarcosinate: 30-100 ppm pH*: 8.5 - 9.5

System Volume:

*use Dipotassium Phosphate as pH buffer"

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SECTION 23 24 00 Page 3