Specification Technical Specification - Mechanical Doc no. BMIS0209 Document uncontrolled when printed Page: 1 of 229 Version: 11.0 Issue date: 20/12/2019 Technical Specification - Mechanical Table of Contents Revision Details 11 Foreword 14 Copyright 14 Acronyms 14 General Terms and Definitions 16 General requirements 17 M1.1 Scope 17 M1.2 Standards 17 M1.3 Equipment compatibility 17 M1.4 Equipment design 17 M1.5 Materials 18 M1.6 Recycled and reused materials 18 Safety equipment and safety signs 19 M2.1 General 19 M2.2 Guards 19 M2.3 Safety signs 19 M2.4 Safety interlocks 19 M2.5 Fail safe 19 M2.6 Protection from vehicles 20 M2.7 Work at heights 20 Fasteners 22 M3.1 General 22 M3.2 Stainless steel fasteners 22 M3.3 Non-stainless steel fasteners 23 Platforms, walkways, stairways, ladders and handrails 24 M4.1 General 24 M4.2 Fixings for floor plates and grating penetration covers 24 Bearings and lubrication 25 M5.1 General requirements 25 M5.2 Grease lines 25 M5.3 Oil lubricated bearings 26 M5.4 Electric motor bearings 26 M5.5 Bearing condition monitoring for large machines 26 Doc no. BMIS0209 Document uncontrolled when printed Page: 2 of 229 Version: 11.0 Issue date: 20/12/2019 Technical Specification - Mechanical Vibration 27 M6.1 General 27 M6.2 Natural frequencies 27 M6.3 Vibration severity 27 Noise 29 M7.1 Introduction 29 M7.2 General 29 M7.3 Occupational noise 29 M7.4 Environmental noise - EPA compliance 30 M7.5 Noise control 30 Painting and corrosion protection 31 Valves 32 M9.1 General 32 M9.2 Marking 34 M9.3 Type of valves 35 M9.4 Valve installation 37 M9.5 Gate valves 39 M9.6 Non-return valves 41 M9.7 Butterfly valves 43 M9.8 Knife-gate valves 46 M9.9 Diaphragm valves 47 M9.10 Plug valves 47 M9.11 Ball valves 49 M9.12 Air valves for water supply 49 M9.13 Sewage air release and vacuum break valves 49 M9.14 Reduced pressure zone (RPZ) valve 50 M9.15 Hydraulically operated automatic control valves 50 M9.16 Plunger type control (needle) valves 50 M9.17 Hydrant / air valve isolating valves 51 M9.18 Pressure / vacuum relief devices 51 M9.19 Pinch valves 52 M9.20 Valves DN65 and smaller 52 Doc no. BMIS0209 Document uncontrolled when printed Page: 3 of 229 Version: 11.0 Issue date: 20/12/2019 Technical Specification - Mechanical Portable valve actuators 53 Electric valve actuators 54 Pneumatic valve actuators 55 Pumps 56 M13.1 General 56 M13.2 Type of pumps 56 M13.3 Centrifugal pumps 58 M13.4 Horizontal centrifugal pumps 59 M13.5 Submersible centrifugal pumps 63 M13.6 Vertical centrifugal, mixed flow and axial flow pumps 65 M13.7 Progressive cavity pumps 68 M13.8 Installation of pumping units 71 Flame arresters 72 Vacuum system 73 M15.1 General 73 M15.2 Requirements of vacuum system 73 M15.3 Nameplates 74 M15.4 Valves 74 Pipework 75 M16.1 General 75 M16.2 Scope 75 M16.3 Pipework design 75 M16.4 Pipe material schedule and codes 76 M16.5 Connections of pipes, valves and fittings 83 M16.6 Painting and labelling 85 M16.7 In-Line strainers 88 M16.8 Pressure gauges 88 M16.9 Pipes and fittings installation 88 M16.10 Testing and commissioning 89 M16.11 Not used 89 M16.12 Anchorage of pipework 89 M16.13 Pipework drainage 89 M16.14 Air valves vents 89 M16.15 Pipework penetrating structures 90 M16.16 Identification of buried pipework 90 Doc no. BMIS0209 Document uncontrolled when printed Page: 4 of 229 Version: 11.0 Issue date: 20/12/2019 Technical Specification - Mechanical Lifting facilities 91 M17.1 General 91 M17.2 Jib cranes 91 M17.3 Monorail cranes 92 M17.4 Overhead travelling cranes 92 M17.5 Crane hoists 93 M17.6 Electric hoist 93 M17.7 Crane electrical requirements 94 M17.8 Prior to manufacture 97 M17.9 Installation and testing 97 Ventilation 98 M18.1 General 98 M18.2 Fans and accessories 98 M18.3 Construction of ductwork 98 M18.4 Dampers 104 M18.5 Access panels 105 M18.6 Air balancing 106 M18.7 Vibration 106 M18.8 Ventilation air inlet and exhaust louvres 107 M18.9 Specific ventilation requirements for water pumping stations 107 M18.10 Ventilation of small and booster water pumping stations 108 M18.11 Ventilation of sewage pumping station dry wells 108 Odour and septicity control for sewage pumping stations and sewer network 109 M19.1 Odour control 109 M19.2 Septicity control 109 Gearboxes 110 Drives and couplings 111 M21.1 Couplings 111 M21.2 Vee belts, wedge belts and toothed belts drives 111 M21.3 Chain drives 111 Penstocks 112 M22.1 General 112 M22.2 Materials of construction 112 M22.3 Gate 114 M22.4 Frame 114 M22.5 Sealing and seating faces 114 M22.6 Spindle 114 Doc no. BMIS0209 Document uncontrolled when printed Page: 5 of 229 Version: 11.0 Issue date: 20/12/2019 Technical Specification - Mechanical M22.7 Yoke 115 M22.8 Pedestal 115 M22.9 Actuators 115 M22.10 Installation 115 M22.11 Inspection and testing 115 M22.12 Maximum leakage rates 115 M22.13 Required data 116 M22.14 Marking 116 Stop boards 117 Weirs 118 Screening equipment 119 M25.1 General 119 M25.2 Band screens 119 M25.3 Step screens 121 M25.4 Screenings wash press 122 M25.5 Screenings washing/dewatering unit 124 Grit removal system 126 M26.1 General 126 M26.2 Operation 126 M26.3 Paddle mechanism 127 M26.4 Grit removal pump and pipework 127 M26.5 Grit pump/water sparge assembly 128 M26.6 Grit washer classifier 128 Rectangular clarifier/primary sedimentation tank equipment 129 M27.1 Scraper - chain and flight type 129 M27.2 Scraper - Travelling bridge type 134 M27.3 Sludge blanket detector 135 M27.4 Drainage 135 M27.5 Safety 135 M27.6 Sprays 135 M27.7 Pre-commissioning 135 Circular clarifiers/sedimentation tank 136 M28.1 General 136 M28.2 Clarifier inlets 136 M28.3 Sludge scraper assembly 136 M28.4 Skimmer 136 M28.5 Effluent launder 136 Doc no. BMIS0209 Document uncontrolled when printed Page: 6 of 229 Version: 11.0 Issue date: 20/12/2019 Technical Specification - Mechanical M28.6 Weirs 136 M28.7 Scum baffle 137 M28.8 Scum box 137 M28.9 Bridge support column 137 M28.10 Walkways 137 M28.11 Centre drive platform 137 M28.12 Clarifier bridge motion sensors 137 M28.13 Clarifier bridge drive VSD 137 M28.14 Sludge blanket detector 138 M28.15 Drainage 138 M28.16 Safety 138 M28.17 Sprays 138 M28.18 Testing 138 Decanter equipment 139 M29.1 Decanting equipment requirements 139 M29.2 Side wall decanter 139 M29.3 End wall decanter 140 M29.4 Materials requirement 141 M29.5 Decant trough control 141 Diffused air aeration system 142 M30.1 Aeration diffusers 142 M30.2 Air pipework 143 M30.3 Purge pipework 145 M30.4 On-line diffuser cleaning 145 M30.5 Leak and pattern testing diffuser system 146 Blowers 147 M31.1 General design requirements 147 M31.2 Blower general arrangement 147 M31.3 Ancillary equipment for blowers 148 M31.4 Blower control 148 M31.5 Blower noise limits 148 M31.6 Centrifugal blower 149 M31.7 Positive displacement blower 149 M31.8 Materials of constructions 150 M31.9 Filters and silencers 150 M31.10 Flexible connections 150 M31.11 Pressure relief valve 151 M31.12 Non-return valves 151 Doc no. BMIS0209 Document uncontrolled when printed Page: 7 of 229 Version: 11.0 Issue date: 20/12/2019 Technical Specification - Mechanical M31.13 Isolating valves 151 M31.14 Temperature measurement 151 M31.15 Piping vibration 151 Surface aerators 152 M32.1 Surface aerators 152 M32.2 Impellers 152 M32.3 Floating platforms 152 M32.4 Deflectors 153 M32.5 Aeration noise 153 Mixers 154 M33.1 General 154 M33.2 Materials 154 M33.3 Submersible mixers 155 M33.4 Top entry mixers 155 M33.5 Shaft seals 156 M33.6 Motor protection 156 Rotary drum thickener (RDT) 157 M34.1 General 157 M34.2 Rotary screen 157 M34.3 Drive system 157 M34.4 Cylindrical screen 157 M34.5 Enclosure 157 M34.6 Frame and access 158 M34.7 Infeed tank 158 M34.8 Pipe connections 158 M34.9 Spray system 158 M34.10 Accessories 158 M34.11 Spare parts 159 M34.12 Electrical devices and Controls 159 Sludge dewatering equipment 160 M35.1 Centrifuge 160 M35.2 Rotary screw press 164 Conveyors 168 M36.1 General 168 M36.2 Motion detectors 168 M36.3 Screw conveyors 168 M36.4 Belt conveyors 170 Doc no. BMIS0209 Document uncontrolled when printed Page: 8 of 229 Version: 11.0 Issue date: 20/12/2019 Technical Specification - Mechanical Chemical systems 171 M37.1 General 171 M37.2 Overall requirements 173 M37.3 Staff requirements and design deliverables 176 M37.4 Chemical system description and requirements 177 M37.5 Chemical delivery bund 178 M37.6 Chemical storage bund 180 M37.7 Chemical storage tank 182 M37.8 Chemical dosing system and components 185 M37.9 Chemical pipework and fittings 190 M37.10 Dilution water 193 M37.11 Specific requirements for individual chemicals 193 Tertiary filters 201 M38.1 General 201 M38.2 Type of filters 201 M38.3 Performance requirements 201 M38.4 Filter valves and control 202 M38.5 Launders 203 M38.6 Filter underdrains 203 M38.7 Filter media 203 M38.8 Preparation for media placement 206 M38.9 Packaging 206 M38.10 Air scour system 206 M38.11 Filter scour air release 207 M38.12 Backwash system 208 M38.13 Filtration sequencing 209 M38.14 SCADA screens 210 UV Disinfection equipment 211 M39.1 General 211 M39.2 Low pressure UV 211 M39.3 Medium pressure UV 214 M39.4 Cleaning 216 M39.5 Safety equipment 216 Compressed air service 217 M40.1 General 217 M40.2 Air Compressor requirement 217 M40.3 Refrigerated dryer 218 M40.4 Filters 218 Doc no.