Good Engineering Practice for Northern Water and Sewer Systems

More documents

Recommendations

Info

Recommendation 2.6.1 Clean Sand Bedding Clean sand bedding is preferred. 2.6.2 Crushed Gravel Crushed gravel (maximum 25 mm) is an alternate to clean sand bedding. 2.6.3 Screened Pit Run Gravel Screened pit run gravel (maximum 25 mm) may be used as bedding material if sand or crush is not available. 2.6.4 Warning Tape Warning tape should be placed on top of the bedding. Rationale Sand provides the least potential damage to pipe insulation coating and is readily compacted around the pipes. Gravel is better suited to poor trench conditions. It is utilized where local sand sources are limited or nonexistent. In some communities, sand or crush may not be available. Tape identifies pipes in future excavations and minimizes damage. Water - Blue Sewer - Green Imprinted Wording: “Caution: Buried Water (or Sewer) Below”. 2.7 CONNECTIONS TO STRUCTURES Care must be taken in connecting pipes to buildings, manholes or access vaults as differential movement can damage the pipes. Recommendation 2.7.1 Flanges Flanged connections should only be considered if the joint is supported by the structure or permafrost. .1 Gaskets Gaskets shall be full face neoprene. Rationale Rigid flanges experience high stress loads when subjected to differential movements. They are prone to failure if not properly supported. Partial gaskets are difficult to install properly. Fabricreinforced gaskets do not seal properly on flat-faced flanges. GOOD ENGINEERING PRACTICE 2-13 Apr-04 Piping
2.7.2 Differential Movement Connections Pipe connections should allow movement of the pipe relative to the structure. .1 PVC or Ductile Iron Two couplings or bell-andspigot joints are recommended. Relative movement of buried objects is common and connections must allow this movement without pipe damage. Two joints allow full differential movement without stressing adjacent pipe. Figure 2.5 – Differential Movement Connection .2 High Density Polyethylene One coupling with a stainless steel insert is generally sufficient. HDPE is a flexible pipe and thus, together with one coupling, generally allows necessary movement. A stainless steel insert approximately 60% of the coupling length is used to ensure the coupling, when tightened, compresses the coupling seal. If the insert is not used, the flexible HDPE deforms and the coupling seal does not compress properly. Photo 2.7 – Couplers on HDPE Pipe GOOD ENGINEERING PRACTICE 2-14 Apr-04 Piping
Page 1 and 2: GOOD ENGINEERING PRACTICE for NORTH
Page 3 and 4: TO THE READER The Northwest Territo
Page 5 and 6: SPECIAL ACKNOWLEDGEMENTS The public
Page 7 and 8: PREAMBLE Introduction The Good Engi
Page 9 and 10: TABLE OF CONTENTS (Summary) Page PR
Page 11 and 12: 8.0 SANITARY SEWERS 8.1 Introductio
Page 13 and 14: Table of Contents GENERAL UTILITY O
Page 15 and 16: 1.2.5 Local Suppliers Specification
Page 17 and 18: 1.6 CODES, REGULATIONS AND GUIDELIN
Page 19 and 20: 1.6.8 Standards and Guidelines Stan
Page 21 and 22: 1.9 CONTACTS Contacts for technical
Page 23 and 24: 2.10 PIPE TESTING .................
Page 25 and 26: • Corrugated Metal Pipe (CMP) for
Page 27 and 28: Figure 2.1 - Schematic Ground Tempe
Page 29 and 30: Recommendation 2.4.1 High Density P
Page 31 and 32: 2.4.2 Polyvinyl Chloride (PVC) PVC
Page 33 and 34: 2.4.4 Steel (Cement Lined) Welded s
Page 35: Figure 2.3 - Mobilization of Envelo
Page 39 and 40: 2.8.3 Water Heating It is generally
Page 41 and 42: 2.9.3 45° Valved Nipples (50 mm) W
Page 43 and 44: Table of Contents ACCESS VAULTS AND
Page 45 and 46: 3.0 ACCESS VAULTS AND MANHOLES 3.1
Page 47 and 48: 3.3.2 Pre-cast Concrete Barrels (12
Page 49 and 50: Recommended for water valve and fir
Page 51 and 52: 3.4 STRUCTURAL DESIGN Regardless of
Page 53 and 54: 3.9 PREVENTION OF GROUNDWATER INFIL
Page 55 and 56: 3.10.4 Double-Walled HDPE Access Va
Page 57 and 58: 3.12 TESTING All access vaults and
Page 59 and 60: 4.0 FIRE PROTECTION 4.1 INTRODUCTIO
Page 61 and 62: 4.4 DISTRIBUTION Fire hydrants shou
Page 63 and 64: 4.6.2 Hydrants in Access Vaults Fir
Page 65 and 66: 4.8 CONSISTENCY To the extent possi
Page 67 and 68: 5.0 WATER SERVICES 5.1 INTRODUCTION
Page 69 and 70: Recommendation 5.4.2 Water Circulat
Page 71 and 72: 5.5 THAW RECOVERY Any service insta
Page 73 and 74: Recommendation 5.6.3 Threadolets Re
Page 75 and 76: 5.7 CURB STOPS A separate curb stop
Page 77 and 78: 5.9 INSTALLATION AND REPLACEMENT In
Page 79 and 80: Table of Contents SANITARY SEWER SE
Page 81 and 82: 6.4 INSTALLATION Installation of bu
Page 83 and 84: Use of a bend adjacent to the main
Page 85 and 86: 6.8 BUILDING/PLUMBING CONNECTION Ge
Page 87 and 88:
Table of Contents WATERMAINS Page 7
Page 89 and 90:
7.3.4 Pipe Size Minimum pipe diamet
Page 91 and 92:
7.10 LEAK DETECTION Watermain syste
Page 93 and 94:
Table of Contents SANITARY SEWERS P
Page 95 and 96:
8.3.4 Curved Sewers Curved sewers s
Page 97 and 98:
Table of Contents TRUCKFILL STATION
Page 99 and 100:
9.0 TRUCKFILL STATIONS AND PUMP HOU
Page 101 and 102:
Figure 9.2 - Typical Wetwell Intake
Page 103 and 104:
9.3.8 Pull Cable Recommend an aircr
Page 105 and 106:
9.5.3 Overhead Fill Arm The use of
Page 107 and 108:
9.7 BUILDING LAYOUT/FLOORPLAN Recom
Page 109 and 110:
9.9.3 Parking Recommend providing a
Page 111 and 112:
Table of Contents HOUSEHOLD STORAGE
Page 113 and 114:
Table of Contents WATER QUALITY AND
Page 115 and 116:
For groundwaters, recommend selecti
Page 117 and 118:
Filtration and disinfection should
Page 119 and 120:
11.6 DISINFECTION SYSTEM Unless the
Page 121 and 122:
11.7.2 Regulatory and Process Contr
Page 123 and 124:
11.9 RESIDUALS Wastewater residuals
Page 125 and 126:
12.0 WATER STORAGE 12.1 INTRODUCTIO
Page 127 and 128:
12.4 SEASONAL STORAGE Many northern
Page 129 and 130:
12.6.2 Equalization Storage Recomme
Page 131 and 132:
13.0 INSULATION 13.1 INTRODUCTION T
Page 133 and 134:
13.4.3 Half Shells and Fitting Cove
Page 135:
13.7 ULTRAVIOLET AND MECHANICAL PRO
Page 164 and 165:
INDEX A Access Portals 2-17 Access
Page 166 and 167:
INDEX G Gasket 2-13, 3-9, 3-11 Gate
Page 168 and 169:
INDEX R Rae 2-1, 2-2, 3-1, 12-2 Ran
show all

Good Engineering Practice for Northern Water and Sewer Systems

Create successful ePaper yourself

Delete template?

Save as template?