General Construction Specifications
SECTION 15490
CHLORINATION PIPING SYSTEM
PART 1 — GENERAL
1.01 Description
A. Scope:
1. Furnish all labor, materials, and incidentals required to install, test and start-up the chlorination piping system as shown and specified.
2. The extent of the piping is shown on the Drawings and specified herein.
B. Related Work Specified Elsewhere:
1. Section 02200, Excavation and Backfill.
2. Section 11260, Chlorine Feed System.
3. Section 15100, Valves and Appurtenances.
1.02 Quality Assurance
A. Reference Standards: Comply with applicable provisions and recommendations of the following, except as otherwise shown on specified:
1. ASTM A53, Welded and Seamless Steel Pipe.
2. ASTM A105, Carbon Steel Forgings for Piping Components.
3. ASTM A181, Carbon Steel Forgings for General Purpose Piping.
4. ASTM D1598, Test for Time-to-Failure of Plastic Pipe Under Constant Internal Pressure.
5. ASTM D 1599, Test for Short-Time Rupture Strength of Plastic Pipe, Tubing and Fittings.
6. ASTM D 2122, Determining Dimensions of Thermoplastic Pipe and Fittings.
7. ASTM D1784, Rigid and Chlorinated PVC Compounds.
8. ASTM D1785, Schedules 40, 80 and 120 PVC Pipe.
9. ASTM D2467, Socket-Type PVC Plastic Pipe fittings.
10. ANSI B2.1, Pipe Threads (Except Drysealed).
11. ASTM B 88, Seamless Copper Water Tube.
12. Chlorine Institute Pamphlets No. 6 and No. 17.
B. Chlorination Equipment System supplier shall size all chlorine gas piping and flexible connections to suit specific feed rates.
1.03 Submittals
A. General: Comply with requirements of Sections 01340, 15052 and 15054.
B. Manufacturer's Certification: Submit Manufacturer's Certification that chlorine gas valves have been tested for seat tightness using at least 150 psi of clean dry air and that chlorine gas valves are suitable for the intended chlorine service.
1.04 Product Delivery, Storage and Handling
Comply with requirements of the General Conditions.
1.05 Guarantee
Comply with the requirements of the General Conditions.
PART 2 — PRODUCTS
2.01 Piping Materials
A. General:
1. Pipe Hangers and Supports: Comply with Section 15140.
2. Wall Seals: Mechanically expandable rubber link type.
B. Steel Piping:
1. Pipe:
a. General: Use type of steel pipe specified below unless otherwise recommended by chlorination supplier.
b. Reference: ASTM A 53.
c. Type: S-Seamless, Grade A or B, Black finish.
d. Wall thickness: Schedule 80.
2. Joints:
a. Type: Threaded.
b. Reference: ANSI B2.1, latest edition.
c. Joint Preparation: Teflon tape.
d. Class: 2000 lbs.
3. Fittings:
a. Type: Forged steel threaded.
b. Reference: ASTM A 181, Class 80.
c. Class: 2000 lbs.
C. Polyvinyl Chloride (PVC) Piping:
1. Pipe:
a. Standard: ASTM D1784 and ASTM D1785.
b. Type: Type 1, Grade 1, rigid.
c. Wall Thickness: Schedule 80.
d. Service Conditions: Chlorine gas under a vacuum of 0 to 15 inches mercury at ambient temperature or chlorine solution 0 to 150 psi.
2. Joints:
a. Connect pipe by solvent welded socket couplings except where flanges are required at expansion joints, valves, flowmeters, flanged fittings or where otherwise shown or directed.
b. Solvent weld in strict accordance with the manufacturer's recommendations.
c. Flanged Joints: Use drilled 125 lb. ANSI Standard with 1/16 inch teflon impregnated asbestos full-face gaskets.
d. Primer and Solvent Cement: Use type recommended or supplied by pipe manufacturer.
e. Expansion Joints: Use PVC telescoping type with teflon impregnated seal rings and flanged ends.
3. Fittings:
a. Standard: ASTM D 2467.
b. Wall Thickness: Schedule 80.
2.02 Valves
A. Provide and install valves as shown on the Drawings and herein specified.
B. Comply with Section 15100, unless otherwise specified.
C. Order all Chlorination System valves "Cleaned for Chlorine Service."
D. Auxiliary Ton Container Valve:
1. Type: Captive yoke, AU-1.
2. Standard: Chlorine Institute Pamphlet No. 17, latest edition.
3. Construction:
a. Body: Aluminum Silicon Bronze.
b. Stem and Seat: Monel.
c. Packing Nut, Gland and Collar: Brass.
d. Outlet Cap: Brass.
e. Yoke: Carbon Steel.
f. Washer: Lead.
4. Connections:
a. Inlet: Yoke type.
b. Outlet: 1.03-14 NGO (National Gas Outlet Thread)
5. Manufacturer:
a. Wallace & Tiernan Division of Pennwalt Corp.
b. Or equal.
E. Chlorine Header Shut-Off Valve:
1. Type: Standard, HE-1.
2. Construction:
a. Body: Aluminum Silicon Bronze.
b. Stem and Seat: Monel.
c. Packing Nut, Gland and Collar: Brass.
d. Outlet Cap: Brass.
e. Washer: Lead.
3. Connections:
a. Inlet: 1.03-14 NGO (National Gas Outlet Thread).
b. Outlet: 3/4" NPT.
4. Manufacturer:
a. Wallace & Tiernan Division of Pennwalt Corp.
b. Or equal.
F. Line Valve:
1. Type: PVC body, double union ball valve, LI-1.
a. Construction:
(1) Body and Ball: PVC, Type 1, Grade 1.
(2) Seats: Teflon.
(3) Seals: Viton, Self-lubricating "O" rings.
b. Required Features:
(1) Socket weld, unless otherwise specified in the schedule.
(2) Operator: Lever, unless otherwise specified in the schedule.
c. Service: Chlorine solution and chlorine gas (vacuum).
d. Manufacturer:
(1) Plastic Piping System, Inc.
(2) Asahi/America.
(3) Or equal.
2. Type: Steel body ball valve, LI-2.
a. Construction:
(1) Body: Carbon Steel.
(2) Ball: Monel.
(3) Seat: Filled TFE.
(4) Seal: TFE.
b. Required Features: Excess pressure automatically relieved upstream.
c. Service: Chlorine gas (pressure).
d. Reference: Chlorine Institute Pamphlet No. 6, latest edition.
e. Manufacturer and Model:
(1) Jamesbury Corp., 21C-2271MT.
(2) Or equal.
G. Check Valve:
1. Type: PVC ball check valve, CV-1.
2. Construction: PVC, Type 1, Grade 1.
3. End Connections: Socket welded.
4. Service: Chlorine solution.
5. Manufacturer:
a. Plastic Piping Systems, Inc.
b. Asahi/America.
c. Or equal.
2.03 Accessories
A. General: Provide accessories as shown on the Drawings and herein specified.
B. Unions for Chlorine Gas Pressure Lines:
1. Type: Square flanged ammonia. Two-bolted oval or four bolt.
2. Construction: Forges Carbon Steel, ASTM A105.
3. Gaskets: 1/16 inch thick bonded asbestos fiber, MIL-A-17472B.
C. Flexible Connections (Pressure):
1. Standard: Chlorine Institute Pamphlet No. 6, latest edition.
2. Pipe:
a. Material: Seamless Copper.
b. Reference: Astm B 88 and Fed. Spec. WW-T-799.
c. Type K, soft annealed.
3. Fittings:
a. Adapters:
(1) Brazed to each end of tube using brazing alloy containing no tin.
(2) Compatible with auxiliary ton container valves and chlorine header shut-off valves for chlorination system.
b. Couplings:
(1) Material: Cadmium plated copper.
(2) Threads: 1.03-14 NGO (National Gas Outlet Thread), female.
(3) Couplings slide over adapters to thread onto auxiliary ton container valves or chlorine header shut-off valves.
c. Gaskets: Lead.
4. Manufacturer and Model:
a. Wallace and Tiernan Division of Pennwalt Corp., UX-1098.
b. Or equal.
D. Pressure Gauges:
1. Provide pressure gauges with diaphragm seals as shown on the Drawings for:
a. Injector water supply lines.
b. Chlorine solution lines.
2. Provide pressure gauges and diaphragm seals in accordance with Section 13312, Part 2 for pressure gauges and diaphragm seals.
3. Range:
a. Injector Water Supply Lines: 0-100 psig.
b. Chlorine Solution Lines: 30" Hg-0-15 psig.
4. Connection: Pipe tap connections with diaphragm seals.
5. Mounting: Stem mount, bottom connection.
E. Chlorine Gas Filter: Provide chlorine gas filters on the chlorine gas header as shown on the Drawings.
1. Type: Two chamber strainer.
2. No. Required: Two (2), as indicated on the Drawings.
3. Construction: 25,000 lb tensile strength grey iron castings.
4. Filter rated for 560 psi working pressure.
5. Manufacturer:
a. Chlorine Specialties Inc.
b. Or equal.
2.04 Piping Schedule
A. Chlorine Gas Pressure Piping: Steel.
B. Chlorine Gas Vacuum Piping: PVC.
C. Chlorine Solution Piping, Buried or Exposed: PVC
D. Pipe Sizes: Comply with Drawings and chlorine system supplier's recommendations.
2.05 Factory Assembly, Testing and Painting
A. Shop Assembly:
1. Preassemble items in the shop to the greatest extent possible, so as to minimize field splicing and assembly of units at the Project site.
2. Disassemble units only to the extent necessary for shipping and handling limitations.
3. Clearly mark units for reassembly and coordinated installation.
B. Use Type 304 stainless steel fasteners unless otherwise specified.
C. Shop Testing:
1. Each valve shall be fully assembled and shop-inspected for proper seating.
2. Valves shall be fully opened and closed to ensure that it operates freely.
D. Shop Priming:
1. Apply primer to surfaces to be painted. Primer to be as specified and included in the approved paint system.
2. CONTRACTOR shall coordinate primer finish paint systems with paint manufacturer. No shall be painted until paint systems have been submitted and approved.
3. CONTRACTOR shall field apply finish coat as specified.
2.06 Spare Parts
Comply with the requirements of the General Condtitions and provide one (1) valve rebuild/maintenance kit for each size and type of valve scheduled.
2.07 Valve Identification Tags
Provide identification tags for all valves in accordance with the requirements of Section 10400.
2.08 Valve Schedule
A. Conform to type, end connections, operator, and other data specified in plans unless otherwise approved by the ENGINEER.
B. Provide all valves and appurtenances as shown on the Drawings, listed in the schedule and as required to provide a complete, functional and fully operational system.
C. All valves required, but not listed in the schedule, shall comply with the requirements of this section.
D. Valves are identified by a letter and a number code.
1. First two letters designate type of valve.
2. Number code designates specific valve group.
Letter Code
Type of Valve
AU
Auxiliary Container
HE
Header Shut-off
LI
Line
CV
Check Valve
PART 3 — EXECUTION
3.01 Installation
A. Inspect each piece of and section of pipe before installation. Remove all cutting oil, grease and other foreign materials according to the procedure presented in The Chlorine Institute Pamphlet No. 6, latest edition.
B. Install piping in accordance with the Contract Documents and approved Shop Drawings.
C. Provide ammonia type unions in chlorine gas (pressure) lines near each piece of and each valve.
D. Provide unions in chlorine gas vacuum lines near each piece of and each valve.
E. Comply with Sections 15052 and 15054 for piping installation except where otherwise specified.
F. Comply with the recommendations of the Chlorine Institute for dry chlorine piping systems as presented in the Chlorine Institute Pamphlet No. 6, latest edition.
G. Wall Seals: Install where piping passes through holes in walls at both inside and outside wall faces.
H. Install valves for convenient operation of handwheel or wrenches from the operating floor without interfering with access.
I. Orientation of Valves:
1. Install valves plumb and level unless otherwise approved.
2. Install valves free from distortion and strain caused by misaligned piping, or other causes.
3.02 Testing
A. Hydrostatically test all chlorine gas pressure lines at a pressure of 300 psi in accordance with the recommendations in Chlorine Institute Pamphlet No. 6, latest edition.
B. Gas pressure test all chlorine gas pressure and vacuum lines at 150 psi with nitrogen or dry air having a maximum dew point of -40? F in accordance with the recommendations in The Chlorine Institute Pamphlet No. 6, latest edition.
C. Pressure test all chlorine solution lines at 75 psi according to the procedures presented in Section 15052. Test all buried lines prior to backfilling.
D. Notify ENGINEER 48 hours in advance of testing.
E. Conduct all tests in the presence of the ENGINEER unless otherwise approved.
F. Inspect all valves, joints, and specialties for tightness and for proper operation while under test pressure.
G. Repair and retest all lines which fail to pass the specified tests.
H. Provide all test apparatus required at no extra cost to OWNER.
3.03 Cleaning and Drying
A. Cleaning: Inspect each piece of and section of pipe before installation. Remove all cutting oil, grease and other foreign materials according to the procedure presented in The Chlorine Institute Pamphlet No. 6, latest edition.
B. Drying:
1. After the hydrostatic pressure test and before the gas pressure test, blow dry air, having a maximum dew point of -40? F, through all the gaseous chlorine pressure and vacuum lines to remove all moisture and thoroughly dry all piping and accessories.
2. Drying Time: 1 hour, minimum.
** END OF SECTION **
