Design and Layout of UPOU Water Supply Lines
BOQ For For Ins tallati on o f UPOU UPOU Water Water Supply Lines Lin es
SCOPE OF WORKS EXCAVATION, BACKFILLING, RESTORATION 1. GENERAL When specifically provided to the contrary, excavation shall include the removal of materials whatever nature encountered, including all obstructions of any nature that would interfere with the proper execution and completion of the work. Unless otherwise provided, the entire construction site shall be stripped of all vegetation and debris, and such materials shall be removed from the site prior to performing any excavation or placing any fill. The Contractor shall furnish, place, and maintain all supports and shoring that may be required for the sides of the excavations, and all pumping, ditching or other approved measures for the removal or exclusion of water, including taking care of storm water and waste water reaching the site of the work from any source so as to prevent damage to the work or adjoining property. 2. PIPELINE TRENCH TRENCH EXCAVATION EXCAVATION Unless otherwise shown or ordered, excavation for pipelines shall be open-cut trenches. The maximum length of open trench permitted at any one time and in one location shall be 300 meters, or the length necessary to accommodate the amount of pipe installed in a single day, whichever is greater. All newly laid pipe shall be fully backfilled at the end of each day. All open trenches shall be backfilled at the end of the day to prevent accidents. 3. TRENCH TRENCH OVER-EXCAVATION OVER-EXCAVATION TO TO CLEAR OBSTRUCTION OBSTRUCTION Trenches shall be over-excavated to a depth approved by the Engineer for pipeline clearance of obstructions. 4. TRENCH OVER-EXCAVA TION WHEN ORDERED Trenches shall be over-excavated beyond the depth shown when ordered by the Engineer. Such over-excavation shall be to the depth ordered. 5. OVER-EXCAVA TION NOT ORDERED, SPECIFIED, OR SHOWN Any over-excavation carried below the grade ordered specified, or shown shall be refilled to the required grade with suitable selected granular material by the Contractor at his own expense. 6. DISPOSAL DISPOSAL OF EXCESS EXCESS EXCAVATED METERIAL METERIALS S The Contractor shall remove and dispose all excess excavated materials at his own expense and in a manner approved by the Engineer.
7. EXCAVATION IN LAWN LA WN AREAS AREA S Where pipeline excavation occurs in the lawn area, the sod should be carefully removed and stockpiled to preserve it for replacement. Immediately after completion of backfilling and testing of the pipeline, the sod shall be replaced in a manner so as to restore the lawn as near as possible to its original condition. 8. EXCAVA TION IN VICINITY OF TREES Except where trees are shown on the drawings to be removed, trees protected from injury during construction operations; and no tree is to be without written permission from the Engineer. No tree roots over 50 mm diameter shall be cut without the permission of the Engineer. Trees supported during excavation as may be directed by the Engineer.
shall be removed (2 in.) in shall be
9. SAND EXCAVATION Sand excavation shall include removal and disposal of the following: (1) all boulders measuring 0.25 cu. m. (0.33 cu.yd.) or more in volume; (2) all rock material in ledges, bedding deposits, and unstratified masses which cannot be removed without systematic drilling and blasting. 10. WARNING SIGNS/ DEVICES/ DEVICES/ BARRICADES BA RRICADES The Contractor shall provide at its own expense adequate warning signs/ devices/ barricades and flagmen to avoid accidents of pedestrian and vehicles. 11. SURFACE RESTORATION RESTORATION AND PAVING PAVING (a) General - The Contractor shall furnish all materials, labor, plan, and equipment for the removal of all pavement, sidewalks, curbs and gutters, fences, poles, driveways, walks, other property, and surface structures that are necessary for the proper prosecution of the work, but only upon approval of the parties having jurisdiction thereof and of the Engineer. Unless otherwise shown, the Contractor shall restore at his own expense all property removed or destroyed by his operation at least equal to conditions prior to work under this Contract or to the satisfaction of the property owner. 12. REMOVAL OF EXISTING EXISTING PAVEMENT (a) In cutting or breaking up street surfacing required for the performance of the work , the Contractor shall not use equipment which will damage the adjacent pavement. All concrete pavement surfaces to be removed shall be scored with concrete sawing equipment; provided, that any Portland cement concrete base under an asphaltic mix surface will not be required to be scored by sawing. Asphaltic concrete pavement shall be removed to clean straight lines.
The Contractor shall removed the pavement and road surfaces as part of the trench excavation, and the amount removed shall not exceed the maximum width of trench for pipelines as indicated on the drawings, unless otherwise ordered in writing by the Engineer. The width and length of the pavement area required to be removed for the installation of valves, valve chambers, spirals, or other structures shall not exceed the maximum linear dimensions of such structures by more than 0.30 meters on each side. The width of the pavement area required to be removed for the installation of service connections shall not exceed the maximum width as shown on the drawings. (b) Concrete sidewalks, curbs, and gutters required to be removed in connection with performing the work under the Contract shall be cut to the nearest score marks and shall be replaced with the same kind or better material by the Contractor in conformance with the latest specifications, rules, and regulations, and subject to the inspection and approval of the agency having jurisdiction. 13. RESTORATION RESTORATION OF DAMAGED DAMA GED SURFACE SURFACE AND PROPERTY PROPERTY Except where shown on the drawings or otherwise specified, any pavement, trees, shrubbery, fences, poles or other property and surface structures which have been damaged, removed, or disturbed by the Contractor, whether deliberately or through failure to carry out the requirements of the Contract Documents, municipal ordinances, or the specific direction of the Engineer, or through failure to employ usual and reasonable safeguards shall be replaced or repaired at the expense of the Contractor. 14. REPLA CEMENT OF SURFACE STRUCTURE AND PRIVATE PROPERTY Except where shown on drawings, the Contractor shall restore all private property and surface structures removed or disturbed as a part of the work to a condition equal to that before the work began. He shall also furnish all labor and materials incidental thereto at his own expense. No payment shall be allowed for dirt road restoration. 15. TEMPORARY TEMPORARY RESURFACING RESURFACING AND REPAVING Immediately upon completion of backfilling of the trench or excavation in paved areas, the Contractor shall place a temporary pavement, at least 40 mm. (1.5 in.) in thickness, over-all disturbed areas of the streets, paved driveways, alleys and other traveled places where the original surface has been disturbed by his operation. The temporary pavement shall be of a character satisfactory in all respects and safe for public travel. The temporary surfacing may consist of compacting broken stone at such depth as is necessary to withstand the traffic to which it is subjected. The broken stone shall be surfaced with "cold patch" or, if approved, sufficient sand, soil, or other materials shall be spread to hold the stone in place and prevent raveling. As
fill settles, new stone and binder must be added and compacted. The surface of all temporary repaving shall conform with the street grades. Mounting up of the material over the trench and covering the same with loose broken stone will not be considered as a compliance with the above requirements. The temporary repavement shall be placed and maintained by the Contractor at his own expense until permanent surfacing is completed. The Contractor shall immediately remove and replaced in a satisfactory condition any and all such pavement as shall become unsatisfactory and not in accordance with the terms and intent of the specifications. Upon completion of substantial parts of the project but not before the pipeline has been tested, the temporary resurfacing shall be replaced with permanent resurfacing. 16. PAVING (a) Paving materials and methods of construction shall be in accordance with referenced sections of the latest edition of the Standard Specifications of the Department of Public Highways, Republic of the Philippines. Thickness and extent of base course, paving course, and other construction details shall be as shown on the drawings. All provisions contained in the referenced Standard Specification involving "measurement" and "payment" are not applicable to worked performed under this Contract. (b) Borrow-When sufficient suitable material is not available from the roadway excavations, additional "borrow" materials shall be obtained from other sources. This "borrow" materials shall be in accordance with the approval of the Project Engineer. Said borrow shall be for the expense of the contractor. (c) Subgrade Preparation - This item shall consist of the preparation and conditioning of the subgrade to the full width of the roadbed in accordance with the referenced Standard Specifications and in conformity with the lines, grades, and cross-sections existing in the field. (d) Aggregate Base Course - This item shall consist of a foundation for the surface course, composed of gravel or crushed stone and filler materials in accordance with the Standard Specifications or as directed by the Project Engineer. This shall be applied to the gravel roadway and parking area. (e) Bituminous Concrete Surface Course - This item shall consist of a pavement composed of bituminous concrete on a prepared base. (f) Portland Cement Concrete Pavement - This item shall consist of a pavement composed of Portland Cement concrete on a prepared base.
PIPING 1. GENERAL (a) The Contractor shall furnish and install install all pipe, fittings, closure pieces , supports, bolts, nuts, gaskets, jointing materials, and appurtenances as shown and specified, and as required for a complete and workable piping system. (b) All bolts and nuts and studs studs in in the assembly as sembly of piping shall conform to the technical standards
(c) All exposed piping p iping shall be adequately supported supp orted with devices of appropriate design. Where details are shown, the supports shall conform thereto and shall be placed as indicated; provided that support for all piping shall be complete and adequate regardless of whether or not supporting devices are specifically shown. (d) All pipes shall be laid laid i n a uniform profile as shown on the drawings. 2.
uPVC PIPES (a) Pipes shall conform to the technical standards. (b) Pipe samples from those delivered at project site shall undergo hydrostatic pressure test, flattening, heat-reversion, acetone test, and impact test (c) Fittings shall be of cast iron. Cast iron fittings shall be cement mortar lined and shall conform to the requirements of the "Standard for Cast Iron and Ductile Iron Fittings, 2-in through 48-in for Water and Other Liquids (AWWA C110), or to the "ISO Recommendation R-13, Cast Iron Pipes, Special Castings Castings and Cast Iron Parts for Pressure Main Lines". The inside diamater of fittings shall be suitable for making a water tight joint with the pipe furnished. Joints for pipe and fittings shall be especially constructed for ring gaskets and joining with neoprene ring gaskets. A sufficient number of ring lubricant shall be furnished to provide for a two percent (2%) over- run. Pipe and fittings shall be labelled by the manufacturer to indicate class rating, type material, manufacturer's trade name and production code.
VALVES 1. GENERAL (a) The Contractor shall furnish and install all valves as specified herein and as shown on the drawings. All valves shall be new and of current manufacture. (b) Flanged valves may be raised or plain faced with serrated gasket surface. Flanges of valves for water working pressure of 1.2 MPa (175 psi) or less shall be faced and drilled to 125 lb. American Standard dimension; flanges of valves for water working pressures greater than 1.2 MPa (175 psi) shall be faced and drilled to 250 lb. American Standard dimension. (c) Each valve body shall be tested under a test pressure equal to twice its design water working pressure, except that gate valves shall be tested in accordance with "STANDARD GATE VALVES FOR ORDINARY WATER WORKS SERVICE" (AWWA C500). (d) When the operating nut of a buried valve is located more than 1.5 meters (5 ft) below the ground surface, the Contractor shall provide and install in the valve box a stem extension. The bottom of the extension shall be securely fastened to the operating nut of the valve, valve, and the top of the extension shall be centered in the valve box.
PRESSURE PRESSURE AND L EAKAGE EAK AGE TESTING AND DISINFECTING DISINFECTING 1. GENERAL The Contractor shall furnish all equipment, labor and materials, including taps, valves and bulkheads as required and exclusive of water and water meter for testing and proper disinfection of the pipelines. The water and any water meter used for testing shall be furnished by the Owner, but the Contractor shall provide the facilities necessary to convey the water from the owner-designated source to the points of use. All testing and chlorinating operations shall be done in the presence of the Engineer. Engineer. ..
2. PIPELINE TESTING All pipelines shall be thoroughly flushed out with water prior to testing. The Contractor shall test the pipeline in sections prior to permanent resurfacing after the trench is backfilled, but with joints exposed for examination except in heavily traveled roadways. Maximum length of test sections shall be 500 meters for distribution mains and 1,000 meters for transmission mains unless otherwise approved by the Engineer. Where test sections are approved which exceed the above maximum lengths the allowable leakage for the lengths in excess of the maximum allowable shall be reduced by fifty percent (50%). The pipeline shall not be filled with water until the following curing periods have elapsed. Description
Minimum Allowable Time
1. Cement Mortar Linings 2. Cement Mortar at Joints 3. Concrete Thrust Block a. Standard Cement b. High early strength cement
14 days 8 hours 7 days 36 hours
The pipeline shall be prepared for testing by closing valves when available, or by placing temporary bulkheads in the pipe and filling the line slowly with water. During the filling of the pipe and before the application of the specified test pressure, all air shall be expelled from the pipeline. To accomplish this, taps shall be made if necessary, at points of highest elevation and after completion of the test and taps shall be tightly plugged unless otherwise specified. After the line or section thereof has been completely filled, it shall be allowed to stand under a slight pressure for a minimum of forty-eight (48rhours"to allow the escape of air from any air pockets and to. allow the pipe or mortar lining to absorb as much water as possible. During this period, all exposed pipes, fittings, valves, hydrants, joints and coupling shall be examined for leaks. If found to be cracked or defective, they shall be removed and replaced by the Contractor with sound material at his own expense. The pipeline shall
then be refilled and all bulkheads, joints and connections shall be examined for leaks. If any are found, these shall be stopped. The test shall consist of holding the test pressure on each section of the line for a period of two (2) hours . The test pressure at the lowest point shall be 690 KPa (100 psi) or 1.0 MPa (150 psi) according to the class of pipe installed, class 100 or class 150, and as approved by the Engineer. Pressure gauges shall also be provided at all ends of the section tested. The water necessary to maintain the pressure shall be measured through a meter or by other means satisfactory to the Engineer. The leakage shall be considered the amount of water entering the pipeline during the two-hour test period. The pipes shall have an allowable leakage not exceeding 1.85 1/mm (20 gal/in) of diameter of pipe per kilometer per day. Should any test of a section of pipeline disclose joint leakage greater than that permitted, the Contractor shall, at his own expense, locate and repair or replace the defective pipe, fitting, joint, coupling or other appurtenance. The test shall then be repeated until the leakage is within the permitted allowance. Closure pieces between newly installed and existing mains shall be tested after the pipe has passed the pressure and leakage test specified above. The test shall include subjecting the joint to a pressure of 345 KPa (50 psi) for a period of five (5) minutes and visually checking for leakage. All visible leaks shall be repaired by the Contractor at no expense to the Owner. 3. PIPELINE PIPELI NE DISINFECTING Before being placed in service, and before certification of completion by the Engineer, all new domestic water mains or extensions to existing systems, or valved section of such extension or any replacement in the existing water system shall be disinfected with chlorine in accordance with AWWA Standard C601. "Standard for Disinfecting Water Mains". Disinfection shall be completed not more than three (3) days prior to placing the pipeline into service unless otherwise approved by the Engineer and care shall be taken to prevent recontamination of the pipeline. A bacteriological test shall be taken, at the expense of the Owner, prior to acceptance of the pipeline
“ TRENCH TRENCH DETAILS” DETAILS”
“ THRU THRUST ST BLOCK”
“ THRU THRUST ST BLOCK”
TECHNICAL TECH NICAL SPECIFICAT SPECIFICATION ION ITEM DESCRIPTION : Gate Valve
Component Component Li st: 1. Stem 2. NBR wiper Ring
4. Bearing 5. Bonnet
7. EPDM rubber manchette 10. Stem nut 8. Bonnet bolt 11. Wedge
3. NBR O-ring
6. Thrust Coll ar
9. Bonnet gasket
12. Body
Materials: Body Bonnet
Grey Cast ir iron, GG GG-25, to to DIN 1691 (BS 1452 grade 220/250) For DN 50, 65, 80, 100, 150 and 350 Grey Cast iron, GG-25, to DIN 1691 (BS 1452 grade 220/250) For DN 200, 250, 300 and 400
Coating ting
Ductile iron, GGG-50, to DIN 1693 (BS 2789 grade 500 - 7) Elect lectro rost sta atica ticall lly y app appli lied ed epox epoxy y re resin sin to to DI DIN 3067 30677 7 - inte intern rna ally lly and and exte extern rna ally lly
Stem Stem sealing
Stainless steel, DIN X 20 Cr 13
Wedge
Ductile iron, GGG-50, core fully encapsulated with EPDM rubber with integral wedge nut of dezincification resistant brass, CZ 132 to BS 2874 Dezin ezinci cifi fica cati tion on resi resist stan antt bra brass ss,, CZ CZ 132 132 to BS 2872 2872 St ai ain le less st st ee eel A2 A2, se seal ed ed wi wit h h ot ot me mel t EPDM rubber
Thrus hrustt Col Colla larr Bon ne net bo bol ts ts Bonnet gasket
NBR wiper ring, 2 NBR O-rings inside and 2 outside a plastic bearing, EPDM rubber manchette
F
Ref . No s.
DN
L
H
Dt
D
Dh
ds
mm
mm
mm
mm
mm
mm
Holes
mm
Wt kg s
TECHNICAL TECH NICAL SPECIFICAT SPECIFICATION ION ITEM DESCRIPTION : Gate Valve
Component Component Li st: 1. Stem 2. NBR wiper Ring
4. Bearing 5. Bonnet
7. EPDM rubber manchette 10. Stem nut 8. Bonnet bolt 11. Wedge
3. NBR O-ring
6. Thrust Coll ar
9. Bonnet gasket
12. Body
Materials: Body
Grey Cast ir iron, GG GG-25, to to DIN 1691 (BS 1452 grade 220/250) For DN 50, 65, 80, 100, 150 and 350
Bonnet
Grey Cast iron, GG-25, to DIN 1691 (BS 1452 grade 220/250) For DN 200, 250, 300 and 400 Ductile iron, GGG-50, to DIN 1693 (BS 2789 grade 500 - 7) Coating ting
Elect lectro rost sta atica ticall lly y app appli lied ed epox epoxy y re resin sin to to DI DIN 3067 30677 7 - inte intern rna ally lly and and exte extern rna ally lly
Stem Stem sealing
Stainless steel, DIN X 20 Cr 13
Wedge
Ductile iron, GGG-50, core fully encapsulated with EPDM rubber with integral wedge nut of dezincification resistant brass, CZ 132 to BS 2874 Dezin ezinci cifi fica cati tion on resi resist stan antt bra brass ss,, CZ CZ 132 132 to BS 2872 2872 St ai ain le less st st ee eel A2 A2, se seal ed ed wi wit h h ot ot me mel t EPDM rubber
Thrus hrustt Col Colla larr Bon ne net bo bol ts ts Bonnet gasket
NBR wiper ring, 2 NBR O-rings inside and 2 outside a plastic bearing, EPDM rubber manchette
F
L
H
Dt
D
Dh
ds
Holes
mm
Wt
Ref . No s.
DN
mm
mm
mm
mm
mm
mm
kg s
02-050-40026 02-080-40026
50 80
178 203
241 297
102 138
165 200
121 152
19 19
4 4
14 17
13.0 20.0
02-100-40026 02-150-40026
100 150
229 267
334 448
158 212
220 285
191 241
19 22
8 8
19 19
26.0 51.0
02-200-40026 02-250-40026
200 250
292 330
562 664
268 320
340 400
298 362
22 25
8 12
24 27
83.0 132.0
02-300-40026
300
356
740
370
455
432
25
12
27
187.0
ITEM DESCRIPTION: uPVC PIPES Nominal Outside Diameter
Mean Outside Diameter (mm)
Wall Thickness (mm)
Effective Length (Meter)
63mm
63.0 – 63.3
3.60 – 4.16
6M
75mm 90mm 110mm
75.0 – 75.3 90.0 – 90.3 110.0 – 110.4
4.30 – 4.93 5.20 – 5.92 6.30 – 7.13
6M 6M 6M
160mm
160.0 – 160.5
9.20 – 10.32
6M
225mm
225.0 – 225.7
12.90 – 14.39
6M
280mm 315mm
280.0 – 280.9 315.0 – 316.0
16.00 – 17.80 18.00 – 20.00
6M 6M
ITEM DESCRIPTION: uPVC PIPES Nominal Outside Diameter
Mean Outside Diameter (mm)
Wall Thickness (mm)
Effective Length (Meter)
63mm
63.0 – 63.3
3.60 – 4.16
6M
75mm 90mm 110mm
75.0 – 75.3 90.0 – 90.3 110.0 – 110.4
4.30 – 4.93 5.20 – 5.92 6.30 – 7.13
6M 6M 6M
160mm
160.0 – 160.5
9.20 – 10.32
6M
225mm
225.0 – 225.7
12.90 – 14.39
6M
280mm 315mm
280.0 – 280.9 315.0 – 316.0
16.00 – 17.80 18.00 – 20.00
6M 6M
Properties
Standard Requirement
Test Method
Vicat Softening Temperature
76ºC min
ISO 2507
Heat Reversion
5% max
ISO 2505
40 g/m2 max
ISO 2508
No sign of delamination or disintegration
ISO 3472
Water Absorption Resistance to Acetone Resistance to Sulfuric Acid
The mass of the specimen shall not increase by more than 0.316g nor decrease by more than 0.013g
ISO 3473
Resistance to External Blows
True impact rate shall not exceed 10%
ISO 3127
Flattening
No evidence of splitting, cracking or breaking when flattened to 40% of the outside diameter
ASTM D2241
Composition Additives Lead Content
O- Rings
2.10% only
PNS65 & ISO 4422 -
Zero
-
1.90% ( by mass ) virgin resin
Machine installed fixed seal with polyprylene (PP) ring homogenously bonded with ethylene propylene Dianne monomer (EPDM)
-
ITEM DESCRIPTION : CAST IRON FITTINGS Short body cast iron fittings shall conform to the requirements of the “American Standard for Cast Iron and Ductile Iron fittings, 2” through 48”, for water and other liquids” AWWA C110), OR Cast Iron Pipes, Special Castings and Cast Iron Parts for Pressure Main Lines” (ISO R13) Fittings shall have a wall thickness of not less than the pipe with which they are used and the ends shall have the ends suitable for making water tight joints.
ITEM DESCRIPTION DESCRIPTION : B RASS FITTINGS Brass Servic Servic e Fitti Fitti ngs:
-
Corporation stops, couplings, adapters and connections shall comply with AWWA Standard C800, latest revision with working pressure of 150psi. Casting should be machine finished. Shall have Manufacturer’s name and/or recognized trademark
ITEM DESCRIPTION DESCRIPTION : FLEXIBLE FLEXIB LE COUPLING Short body cast iron fittings shall conform to the requirements of the “American Standard for Cast Iron and Ductile Iron fittings, 2” through 48”, for water and other liquids” AWWA C-110), OR Cast Iron Pipes, Special Castings and Cast Iron Parts for Pressure Main Lines” (ISO R13)
Standard
Fittings shall have a wall thickness of not less than the pipe width which they are used and the ends shall have the ends suitable for making water tight joints. The coupling shall have a 200-psi minimum working pressure rating; the body (middle ring) and followers shall be made from steel or ductile iron. The bolts and nuts shall be ANSI 304/303 Stainless Steel, or corrosion-resistant alloy bolts and nuts. The coupling shall have an NSF–61-registered fusion bonded powder epoxy coating, and shall meet all applicable requirements of AWWA C-219.
ITEM DESCRIPTION DESCRIPTION : GA LVANIZED LVA NIZED IRON PIPES PIPES AND FITTINGS FITTINGS Schedule
40
Class
PNS 26: 1992 Heavy Gauge Pipes
Process
Zinc coating hot Dip process Minimum of 550 grams of zinc ASTM ( ANSI / ASME B36. 10m. – 1985) ( A - 120) SIZE DIAMETER MM
Main Technical Parameter
OUTSIDE WALL DIAMETER
IN.
NOMINAL WALL THICKNESS
MM
MM
15
½”
21.3
2.77
20
¾”
26.7
2.87
25
1”
33.4
3.38
32
1 ¼”
42.4
3.56
40
1 ½”
48.3
3.68
50
2”
60.3
3.91
65
2 ½”
73.0
5.16
80
3”
88.9
5.49
100
4”
114.3
6.02
ITEM DESCRIPTION DESCRIPTION : BOL TS AND NUTS Diameter of Bolts
Pitch P
D
1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8
.100 .111 .143 .143 .167 .167 .200 .222 .250
Width Across Flats, max
Height, Max
.4375 .5000 .5625 .6250 .7500 0.8125 0.8750 1.0000 1.1250
.194 .242 .289 .338 .386 .433 .481 .577 .672
Threads Per Inch
10 9 7 7 6 6 5 4½ 4
Depth of Thread,
Diameter of Nuts
H
D
.039 .043 .055 .055 .064 .064 .077 .085 .096
1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8
Width Across Flats (Basic), max
Thickness max
0.4375 0.5625 0.6250 0.7500 0.8125 0.8750 1.0000 1.1250 1.3125
0.235 0.283 0.346 0.394 0.458 0.521 0.569 0.680 0.792
