SPECIAL PROVISION TO SPECIAL SPECIFICATION Water Mains and Service Lines

Transcription

1 1995 Metric CSJ , etc. SPECIAL PROVISION TO SPECIAL SPECIFICATION Water Mains and Service Lines For this project, Special Specification Item 5324, Water Mains and Service Lines, is hereby amended with respect to the clauses cited below, and no other clauses or requirements of this Item are waived or changed hereby. For all Articles where there is a references to the San Antonio Water System (SAWS) it is replaced with New Braunfels Utilities (NBU). Article 1., Description is supplemented by the following: (a) Underwriter Laboratories (U.L.) and Factory Mutual (FM) certifications are required on all restraint systems. (b) Unless otherwise noted, restraint systems to be used on PVC C- 900 and C-905 pipe shall meet or exceed A.S.T.M. Standard F "Standard Test Methods for Joint Restraint Products for use with PVC Pipe", or the latest revision thereof. Restraint systems used on ductile pipe shall meet or exceed U.L. Standard 194. (c) Each restraint system shall be packaged individually and include installation instructions. Article 2. Materials. Subarticle (1) Ductile-Iron Pipe and Fittings. Section (a) Ductile-Iron Pipe: 100 mm through 600 mm. The fifth paragraph is voided and replaced by the following: All pipe shall have a standard water works cement mortar lining in accordance with AWWA Standard Cl04 with outside coating per Section of AWWA Standard C151. The interior of all pipes under this Item shall be cement-mortar lined in accordance with AWWA Standard Cl04. Article 2. Materials. Subarticle (1) Ductile Iron Pipe and Fittings is supplemented by the following: (c) Joint Restraints: Joint restraints shall be installed as shown on the joint restraint standard detail drawings or as shown on the plans. For all Ductile-Iron Pipe consisting of joints restraints: Restrainer for PVC C-900/C-905 and Ductile Iron Push-On Type Connection: (i) Pipe restraints shall be utilized to prevent movement for push-on D.I. or P.V.C. (C900 & 905) (compression type) bell and spigot pipe connections or where a Dresser style (flexible coupling has been used to join two sections of plain-end pipe D.I. or P.V.C. (C900 & C905). The restrainer may be adapted to connect a plain end D.I. or P.V.C. pipe to a ductile iron mechanical joint (MJ) bell fitting. The restrainer must not be directionally sensitive

2 (ii) The pipe shall be restrained by a split retainer band. The band shall be cast ductile iron, meeting or exceeding ASTM A536-80, Grade The inside face or contact surface of the band shall be of sufficient width to incorporate cast or machined non-directionally sensitive serrations to grip the outside circumference of the pipe. The serrations shall provide full (360 degrees) contact and maintain pipe roundness and avoid any localized points of stress. The split band casting shall be designed to "bottom-out" before clamping bolt forces ( N m torque) can over-stress the pipe but will provide full nondirectionally sensitive restraint at the rated pressures. (iii) Bolts and nuts used to attach the split retainer ring shall comply with ANSI B /18.2.2, SAE Grade 5. Tee-bolts, nuts and restraining rods shall be fabricated from high-strength, low-alloy steel per AWWA Clll-90. (iv) The split ring type non-directionally sensitive restrainer system shall be capable of a test pressure twice the maximum sustained working pressure listed in section D and be for both D.I. and/or P.V.C. (C900) sizes 150 thru 300 mm and P.V.C. (C905) sizes 350 thru 450. (v) Restrain systems sizes 150 mm thru 450 mm shall be capable of use for both ductile iron and/or P.V.C. C900 and PVC C905. (vi) The restraint system may consist of two types: The 2 split retainer rings and for new construction use only the 1 split and 1 solid cast backup ring. Compression Ring Fitting Restrainer for Ductile Iron Pipe and PVC C-900 and PVC C- 905: (i) Compression ring with follower gland type of restrainer may be utilized in conjunction with Mechanical Joint (MJ) bell and ductile iron pipe fittings for restraining PVC C-900, C905 and ductile iron pipe. (ii) The system shall utilize a standard MJ gasket with a color-coded Compression ring and replacement gland conforming to ASTM A , Grade (iii) Standard MJ fitting Tee-bolts and nuts shall be fabricated from high strength steel conforming to AWWA C111/A and AWWA C153-/A (iv) Standard MJ gasket shall be virgin SER meeting ASTM D BA 715 or 3 BA 515. (v) The restraint system shall be capable of a test pressure twice the maximum sustained working pressure listed in section D. Retainer Gland for Ductile Iron Pipe (only): (i) Radial bolt type restrainer systems shall be limited to ductile iron pipe in conjunction with Mechanical Joint (MJ) bell end pipe or fittings. The system shall utilize a standard MJ gasket with a ductile iron replacement gland conforming to ASTM A The gland dimensions shall conform with standard MJ bolt circle criteria. (ii) Individual wedge restrainers shall be ductile iron heat treated to a minimum hardness of 370 BHN. The wedges screws shall be compressed to the outside wall of the pipe using a shoulder bolt and twist-off nuts to insure proper actuating of the restraining system. (iii) Standard MJ fitting Tee-bolts and nuts shall be high strength steel conforming to AWWA C111/A and C153/A (iv) Standard MJ gasket shall be virgin SBR meeting ASTM D BA 715 or 3 BA

3 (v) The retainer gland system shall be capable of a test pressure of twice the maximum sustained working pressure listed in section D. Maximum Sustained Working Pressure Requirements: Nominal Diameter PVC C-900 Ductile Iron C mm & 150 mm 1379 kpa 2413 kpa 200 mm 1379 kpa 1723 kpa 250 mm & 300 mm 1379 kpa 1379 kpa 350 mm & 400 mm 1379 kpa 1379 kpa 1620 kpa 500 mm & 600 mm 1379 kpa 1379 kpa 1620 kpa Test. TxDOT or NBU may, at no cost to the manufacturer, subject random joint restraint system products to testing by an independent laboratory for compliance with these standards. Any visible defect or failure to meet the quality standards herein will be ground for rejecting the entire order. Product List, Approved Manufacturers and Models. The attached qualified products list identifies specified manufacturers models approved for installation in NBU water distribution systems. Manufacturer PVC C-900 Ductile Iron D.I. 400 mm Above C-905 (i) Slip on Joint Restraint Systems: Uni-Flange Corp Series 1300C Series 1300C C EBBA Iron Sales, Inc Romac Industries, Inc.100 mm -200 mm Model 612, 611 (ii) Compression Ring System: Romac Industries, GripRing GripRing Inc Tyler Corporation MJR Gland MJR Gland (iii) Retainer Gland (MJ): EBBA Iron Sales, Not Approved MEGALUG 1100 Inc Romac Industries, Not Approved Style 612 Inc. Ford/UniFlange Series 1400 StarPipe Products Stargrip

4 Article 2. Materials is supplemented by the following: (22) Polyvinyl Chloride (PVC) Pipe and Fittings. (a) Polyvinyl Chloride Pipe 100 mm through 450 mm. PVC pressure pipe shall be made from Class 1245A or 1245B compounds as determined by ASTM Standard D1784 and shall provide for a hydrostatic test basis (HDB) of 27,580 kpa. All pipe furnished shall be in conformance with AWWA Standard C900/C905.~or latest revision thereof. Except as noted on the plans, all C900 and C905 PVC pipe shall be Class 150 (DR 18) having a sustained pressure requirement of 3,445 kpa (ASTM D2241) and a minimum burst pressure of 5,205 kpa (ASTM D1599). C900 and C905 PVC pipe installed in the New Braunfels Utility (NBU) High Pressure Zone shall be class 200 (DR 14). Dimensions and tolerances for each nominal pipe sizes shall be in accordance with Section 2.2, Table 1 of AWWA Standard C900 and C905. Pipe shall be furnished in standard laying lengths of 6.1 meters (± 25 millimeters) unless otherwise noted. Each pipe shall have an integral bell formed on the pipe end, and be designed to be at least as strong as the pipe wall (ASTM D2472). An elastomeric gasket shall be designed with a retainer ring which "locks" the gasket into integral bell groove and shall be installed at the point of manufacturer. Gasket shall be in conformance with Section 2.6 AWWA Standard C900 and C905. Pipe shall be bundled in pallets for ease of handling and storage. Pipe bundles (units) shall be packaged to provide structural support to insure that the weight of upper units shall not cause deformation to pipe in lower units. No pipe bundles shall be accepted which show evidence of ultraviolet radiation "sunburn" on exposed pipe as may be caused from extended unprotected storage conditions. The manufacturer shall take adequate measures during pipe production to assure compliance with AWWA C900 and C905 by performing qualitycontrol tests and maintaining results of those tests as outlined in Section 3 of that standard. Submission of product shall constitute certification of compliance with this standard. The pipe is intended for use as an underground, direct bury pressure pipe for transport of potable water. The expected life of the pipe system, after installation, is 25 to 50 years. A 1 year warranty shall be provided for all materials sold and delivered for use and incorporated into the New Braunfels water distribution system. Such warranty shall take effect on the date that the pipe is received and accepted by an authorized representative of the New Braunfels Utilities. To be included on the qualified manufacturers list, the Contractor shall provide the Engineer with the following information:

5 (i) Certified test results showing that a representative sample of the PVC pipe, to be used on this project, meets all requirements as stated in this special provision and as shown on the plans. (ii) PVC pipe user reference list and claims history. The Engineer may, at no cost to the Contractor, subject random lengths of pipe to testing by an independent laboratory for compliance with this specification. Any visible defect or failure to meet the quality standards herein will be grounds for rejecting the entire order. (23) Casing End Seals. Each casing shall be provided with an end seal on each open end. The end seals shall be a Model "C" (for new construction) as manufactured by Pipeline Seal and Insulators, Inc., or equal. (a) The end seals shall have the following properties: (i) Materials. Made of 3 mm of Buna "N" rubber with hardness in the range of 65 to 75 durometers. (ii) Band. Provide Type 304 stainless steel straps on each end of the seal. The straps shall be 4 mm thick and 13 mm wide. The clamp shall be constructed of Type 302 stainless steel and the screw shall be Type 400. (iii) Adhesive. Provide an adhesive of a plasticized butyl rubber compound designed to bond to itself when pressed together between the end seal and the carrier pipe and the end seal of the casing pipe. (b) When ordering the end seal, the Contractor shall provide the manufacturer with the following information: (i) Model number (ii) Carrier pipe OD (iii) Pipe material of the carrier pipe (iv) Casing pipe OD (v) Pipe material of casing pipe (vi) Coating thickness (24) Polyurethane Coatings on Steel or Ductile Iron Pipe Casings. Two component polyurethane coating system for use as an external and internal coating for steel or ductile iron pipe. The following is applicable: (a) Coating System. Use a Coating Standard ASTM 016 Type, V system which is a 2-package polyisocyanate, polyol-cured urethane coating. The components are mixed in 1:1 ratio at time of application. The components are balanced viscosities in their liquid state and do not require agitation during use. (b) Exterior Coating Material. CORROPIPE IT-TX and Joint Coating material CORROPIPE II-PW, as manufactured by I Madison Chemical Industries, Inc Old Dixie Road, Forest Park, Georgia 30050, or equal

6 (c) Internal Coating Material. CORROPIPE II-TX and Joint Coating material CORROPIPE II-PW, as Manufactured by Madison Chemical Industries, Inc Old Dixie Road, Forest Park, Georgia 30050, or equal. (d) Repair and/or Touchup Material. CORROPIPE II-PW-TOUCHUP (2- component, brush applied); mix in accordance with Coating manufacturer's recommendations. (e) Thickness. For external coatings, minimum DPT of 25 mils for internal coatings, minimum DPT of 35 mils. Article 3. Construction Methods, Subarticle (1) Excavation, Section (a) Trenches is voided and replaced by the following: (a) Trenches. All excavation shall be to a depth to provide a minimum depth of cover over the top of the pipe as shown below: (1) Minimum of 1.37 meters for pipes 300 millimeters in diameter and smaller and (2) Minimum of 1.68 meters for pipes greater than 300 millimeters in diameter unless otherwise shown on the plans or authorized in writing by the Engineer. Not more than 200 meters of trench shall be opened between the trench cutting and the trench backfilling, except as otherwise directed by the Engineer. The Contractor shall make exploratory cross cuts ahead of pipe laying operations to verify grades of other underground utilities and shall gradually adjust the depth of excavation to clear such utilities. Where new water mains and sanitary sewer mains parallel each other, they shall be at least 3 meters 9 outside diameters) apart unless the sanitary sewer main is constructed of cast iron pipe or the equivalent of 1,030 kpa pressure pipe with watertight joints or unless other precautions approved by the Texas Commission on Environmental Quality (TCEQ)are taken to make the sewer main watertight and to prevent contamination of the water main. Article 3. Construction Methods, Subarticle (2) Pipe Laying, Section (g) Installing Pipe is supplemented by the following: Where the water main is to be encased as shown on the plans, the following procedure shall be used. The encasement pipe shall be at least 5.5 meters long, of the size specified on the plans. The space around the carrier pipe shall be supported at 1.52 meter intervals with spacers or be filled to the spring line with washed sand. The encasement pipe should be centered on the crossing and both ends sealed with cement grout or manufactured seal. Article 3. Construction Methods. Subarticle (4) Backfill, Section (e) Flowable Fill is supplemented by the following: All backfill is to be placed in trenches or access shafts for utility work located under existing or proposed. The pavement shall be flowable fill to a minimum of 450 mm from the back of curb or pavement, if no curb exists or is proposed. Article 4. Measurement. The first paragraph is voided and replaced by the following:

7 This Item will be measured as follows: "Pipe Water Main (DI)", "Pipe Water Main (CSC)", "Pipe Water Main (PVC)", and "Pipe Steel (STL) Casing". Water pipe will be measured by the meter as follows: From the centerline intersection of runs and branches of tees to the end of the valve of a dead-end run and between the centerline intersections of runs and branch tees, where the branch is plugged for future connection, the measurement will include the entire laying length of the branch or branches of the fitting. Article 4. Measurement. The third paragraph is voided and replaced by the following: "Butterfly Valve and Box", "Gate Valve and Box", "Tapping Sleeve, Valve and Box", "New Meter Box", "Automatic Air Release Valve", "Relocate Fire Hydrant", "Tie-Ins", "Reconnect Short Service", "Relay Short Service", "Relay Long Service", "Relay Short Fire Line Service", "Relay Long Fire Line Service", "New Unmetered Short Service", "Adjust Fire Line Service", "Relocate Short Service", will be measured by the each. Article 5. Payment is supplemented by the following: Payment for "Pipe Water Main (PVC) " will include selected bedding and initial backfill materials. These Items will be paid for under "Select Backfill". Article 5. Payment. The third paragraph is voided and replaced by the following: "Pipe Water Main (DI)", Pipe Water Main (CSC)", "Pipe Water Main (Steel Casing)", "Pipe Steel Casing", "Salvage and Recondition Pipe Water Main (CSC)", "Butterfly Valve and Box", "Gate Valve and Box", "Tapping Sleeve, Valve and Box", "Cut-in Tee", "New Meter Box", "Permanent Blow-off", "Temporary Blow-off", "Automatic Air Release Valve", "Split Casing", "Reconnect Short Service", "Relay Short Service", "Relay Long Service", "Relocate Long Service", "Relocate; Short Service", "New Unmetered Short Service", "New Unmetered Long Service", of the size specified; Article 5. Payment. The seventh paragraph is voided and replaced by the following: Payment for "Pipe Water Main (DI)", "Pipe Water Main (CSC)" and "Pipe Steel (STL) Casing" shall include selected bedding and initial backfill materials and polyethylene sleeve. "Pipe Water Main (Steel Casing)" shall also include the cost of all materials such as spacers, washed sand and grout necessary to properly encase the water main as outlined in Section 3. (2) (g) above. Article 5. Payment is supplemented by the following: Payment for "New Unmetered Long Service" and "New Unmetered Short Service" shall include sand backfill, copper tubing or ductile iron pipe (100 millimeters and larger) when required, new meter box, valve and valve box assembly when required, and fittings of the various sizes used in the service line. Payment for "New Meter Box" shall include all materials and work necessary to furnish and install the new meter box as detailed in the plans and specifications

8 Article 5. Payment. Table 8 is supplemented by the following: Table 8 Cont'd Mass of Ductile-Iron and Gray Cast-Iron Fittings (Mechanical, Ring-tite and Lead Joint All Bell Concentric Reducers) Size (mm) Large End Small End MJ MJ Compact Mass (kg) RTJ Compact RTJ 8-8 Table 8 Cont'd