Ontario ENGINEERING STANDARD SPECIFICATION 1.0 PURPOSE 2.0 PIPING AND FITTINGS

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Kristin Bennett
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1 SPEC / PURPOSE This specification describes the minimum requirements for natural gas piping systems in industrial applications for up to 60 psi service downstream of the utility distributor s meter set assembly, and upstream of a gas appliance isolating valve. Buried natural gas & propane pipelines shall also comply with Vale Std. Specification SPEC-11009, Buried Pipelines Natural and Propane Gas. 2.0 AND FITTINGS Design Condition Operating Conditions Design Fabrication Installation Approvals Pipe (above ground) Rating 75 Ambient temperatures Up to 60 Ambient temperatures, indoors and outdoors. Piping shall be installed in accordance with CSA B149.1, Natural Gas and Propane Installation Code and this standard. In accordance with this specification and SPEC-5002 SPEC-500 CSA B149.1 ASME B1.1 Piping General Requirements Welding Process Requirements Natural Gas and Propane Installation Code Power Piping Note: This specification applies to piping systems where the line temperature may fall below -20 o F, after adiabatic expansion or other process conditions. Gas flow through a control valve or orifice will expand, releasing energy and will cool the adjacent piping. Piping on Vale property does not require TSSA for pressure piping, but does require approvals for TSSA under the Fuel Safety division for natural gas systems operating at 60 PSIG and under. All natural gas piping systems shall be treated in accordance with ASME B1.1 and the requirements of TSSA even though it is exempt from registration. 2" & Below Schedule 80 carbon steel per ASME B6.10, ASTM A5 or A106 Gr. B, ERW, plain ends. 2 ½ " through 12" Schedule 40 carbon steel per ASME B6.10, ASTM A5 or A106 Gr. B, ERW or seamless, beveled ends. 14" through 16" 0.75" thick wall ASTM A5 Gr. A or B per ASME B6.10, DSAW or ASTM A106 Gr. A or Gr. B seamless, beveled ends. Note: 1. ASTM A, Grade 6 (cold temperature) piping shall be used outside or in unheated buildings for all pipe systems under 20 dia. and for a minimum 10 feet downstream of pressure control valves and orifice pressure reducing devices.

2 SPEC /12 Pipe (above ground) (cont d) Fittings (above ground) 2. Piping shall be supported in accordance with CSA B149.1, Table " & Below Class 000 per ASME B16.11, forged steel ASTM A105, socket weld. 2 ½ " & Above - Schedule 40 per ASME B16.9, carbon steel ASTM A24 WPB, butt weld. Mitred joints greater than 15 degrees not permitted unless noted on project drawings Alternate for low pressure lines (14" W.G. or less) in accessible places: 1 ½ " & Below Class 150 malleable iron per ASME B16., ASTM A197 or steel, threaded and banded. Threaded Connections to be minimized especially where vibration may be an issue. Refer to project specific contract documents for where threaded piping is allowed, if in doubt, verify with Vale project manager, coordinator or designate for clarification. Buried Plastic Pipelines Note: for cold temperature piping outdoors or in unheated buildings fittings 2 and larger shall be ASTM A420 WPL6. Restrict buried piping to minimum pipe size of 2" NPS. Threaded or flanged joints are not permitted on buried natural gas pipelines. Preferred 2" through 6" High density polyethylene SDR 11 ASTM F2619/F2619M Standard Specification for High-Density Polyethylene (PE) Line Pipe in accordance with CSA B17.4 "Polyethylene Piping Systems for Gas Services". Yellow plain ends for butt heat fusion welding. Fusion of polyethylene joints shall be done by personnel qualified by pipe manufacturer. Surrounding environment must be within manufacturer s specified conditions for performing fusion of joints. All HDPE gas pipe is to be installed with an insulated solid #12 AWG tracer wire taped to pipe every 10 feet, and plastic yellow marking tape 24 above pipe for full length of buried pipe. Pipe in trenches is to be installed in accordance with CSA Z662-latest Oil and Gas Pipeline Systems. Note: Pipe bend radius in accordance with CSA B149.1 or 2" through 12" Schedule 40 carbon steel ASTM A106 Gr. B, seamless yellow jacketed, cross linked polyolefin pipe coating.. Cover buried carbon steel line joints

3 SPEC-5022 /12 Buried Plastic Pipelines (cont d) Fittings (buried service) with approved protective heat shrinkable coating sleeve or 1/2 lap Denso tape approved for Natural Gas Service, followed by 1/2 lap Polyken tape. Note: Thoroughly inspect yellow jacket for defects (preferred) 2" through 6 Butt fusion fittings for SDR-11 high density polyethylene pipe compatible with resin specified for pipes. or 2" through 12" Schedule 40 carbon steel per ASME B6.10, ASTM A5 Gr. B, seamless yellow jacketed. Cover buried carbon steel line joints with approved protective coating sweat sleeve or 1/2 lap Denso tape and 1/2 lap Polyken tape. Note: Thoroughly inspect yellow jacket for defects Branch Connections See Table 1. Attachment to run pipe by full penetration welds Threaded and socket weld half couplings, Class 000 per ASME B16.11, forged carbon steel ASTM A105. Thredolet and sockolet, Class 000 per ASME B16.11 and MSS SP-97, forged carbon steel ASTM A105. Weldolet, Extra strong per ASME B16.11 and MSS SP-97, forged carbon steel ASTM A105. Branch Connections (cont d) Tubing Tie-in to Existing Gas Piping For buried plastic pipelines use approved butt fusion fittings or preapproved anodeless plastic/steel riser connection with bottom fusion connection and top flange connection, special order from Perfection Corporation or approved equal. Anodeless risers are to meet the requirements of ASTM F197 Standard Specification for Factory Assembled Anodeless Risers and Transition Fittings in Polyethylene (PE) and Polyamide 11(PA11) and Polyamide 12 (PA12) Fuel Gas Distribution Systems. Tubing shall be seamless ASTM A179, wall thickness sized for gas service, minimum pressure 500 PSIG. Tubing shall be limited to max. 5/8 O.D. The existing pipe where the proposed tie-in is to be located is to be assessed by Non-Destructive Evaluation (NDE) to determine the condition of the pipe and its suitability to be welded prior to any tie-ins. NDE results are to be submitted to Vale Combustion, Project coordinator or his designate for review and approval to proceed with tie-in.

4 SPEC /12 Hot Tap / Line Stopping Hot Tap / Line Stopping shall only occur as a last resort when it is not feasible or is impractical to take the equipment or piping out of service. The contractor performing the hot tap / line stopping shall have in place a Quality Assurance program approved by the Technical Standards Safety Authority (TSSA) of for hot tap line stopping. The existing pipe where the proposed hot tap is to be located is to be assessed by Non-Destructive Evaluation (NDE) to determine the condition of the pipe and its suitability to be welded. The hot tap / line stopping Contractor / equipment owner / project coordinator in conjunction with the Vale Combustion Services Department shall perform a Process Hazard Review (PHR) prior to the first production weld. The PHR shall conform to the hot tap / line stopping quality manual registered with the TSSA. All welding shall conform to ASME Section IX and TSSA welding requirements. All pressure boundary fittings used in the hot tap / line stopping alteration shall be registered with the Technical Standards Safety Authority of. The Canadian Registration Number and or the Statutory Declaration of the fitting shall be provided to Vale Limited prior to the first production weld. Hot Tap / Line Stopping (cont d) Flanges All pressure boundary fittings used in the hot tap / line stopping alteration shall be registered with the Technical Standards Safety Authority of. The Canadian Registration Number and or the Statutory Declaration of the fitting shall be provided to Vale Limited prior to the first production weld. 2" & Below Class 150 per ASME B16.5, socket weld type, raised face, forged carbon steel ASTM A /2" through 16" Class 150 per ASME B16.5, slip-on or welding neck type, raised face, forged carbon steel ASTM A105. Threaded Joint Sealant Flanged Joint Gaskets Note: Use full face flange when mating with Class 125 cast iron valves. Sealant is to be approved for natural gas service. Masters Metallic Compound (preferred) or Vale approved equal. 1/16" thick ring type, non- asbestos material as follows, as approved by Vale Combustion Services Department. Do not use natural rubber.

5 SPEC /12 Flanged Joint Gaskets (cont d) Flange Bolting Welded Joints Durabla Durlon 9000 (filled PTFE gasket material) for service up to 250 o F, or approved equal or Anchor Klinger C4500 (carbon fibre, nitrile binder gasket material) for service up to 900 o F, or approved equal. Carbon steel bolts to ASTM A19 Gr. B-7, UNC threads, with heavy series hex nuts to ASTM A194 Gr. 7 with Class 2A fit on bolts and 2B fit on nuts. Dimensions to ASME B1.1, B and ASME B Essential variables in accordance with SPEC-500 for the welding procedure (WP) identified. 2" & Below, socket: WP-1 2 1/2" to 6", buttweld: WP- 8" to 16":WP-1 Unions 1 ½ " & Below Class 000 per ASME B16.11, ASTM A105 carbon steel union, socket weld ends. Alternate for low pressure lines (14" W.G. or less) in accessible places: 1 ½ " & Below Class 150 per ASME B16.9, malleable iron ASTM A197, bronze to iron ground seats, threaded ends to ASME B Note: Unions 2" and above are not permitted, unless pre-approved at appliance manifolds. Ball Valves* ½ " & Above Class 150 cast carbon steel ball valve ASTM A216 Gr. WCB. 16 stainless steel ball and stem, virgin Teflon seat and seals. Wrenchoperated (complete with wrench), flanged to ASME B16.5. Valves to be lockable. Alternate for low pressure lines (14" W.G. or less) in accessible places: 1/2" through 1" Cast carbon steel body ASTM A216 Gr. WCB. Steel hard chromium plated ball and stem, minimum pressure rating 1000 PSIG, teflon seats and seals. Wrench-operated (completed with wrench), threaded ends to ASME B Valves to be lockable.

6 SPEC /12 Plug Valves* Globe Valves* Check Valves ½ " & Above Class 150 cast carbon steel plug valve ASTM A216 Gr. WCB. Lubricated plug, wrench operated (complete with wrench), flanged to ASME B16.5. Lubrication shall be approved for Natural Gas Service. Valves to be lockable 1 ½ " & Below Class 150 bronze globe valve ASTM B62, union bonnet, Teflon disc, threaded ends to ASME B Valves to be lockable 1 ½ " & Below Class 600 cast carbon steel swing check valve ASTM A216 Gr. WCB, 1% chrome disc and seats, threaded ends to ASME B " & Above Class 150 cast carbon steel swing check valve ASTM A216 Gr. WCB, 1% chrome disc and seats, flanged to ASME B16.5. or 2" & Above Class 150 carbon steel wafer check valve ASTM A216 Gr. WCB body, 16 stainless steel spring, Buna N O-ring seals Safety Relief Valves Pressure Reducing Valves Instrumentation Isolating Valves Selection by the Engineer. A safety relief valve is required after every pressure reducing valve in order to protect the appliance from over pressure in the event that the pressure reducing valve fails. Selection by the Engineer ½ " Ball Valves - Cast carbon steel body ASTM A216 Gr. WCB. Steel hard chromium plated ball and stem, minimum pressure rating 1000 psig, teflon seats and seals, wrench-operated (completed with wrench), threaded to ASME B Valves to be lockable. *Note: All valves to be CSA/Canadian Gas Association approved. All valves to be lockable. Flexible Hoses Hoses Normal Operating Conditions Flexible hose element rated for minimum working pressure of 50 PSIG and CSA/CGA approved. End connections to suit pipeline termination points and pressure rating. Hot Metal Area - Flexible corrugated stainless steel hose with braided wire sheath. Rated for minimum of 50 PSIG and CSA/CGA approved. End connections to suit pipeline termination points and pressure rating.

7 SPEC /12 Venting Route all vents to atmosphere. Vent terminations are to be directed away from all building air inlet openings, in accordance with CSA B In accordance with the requirements of the TSSA Fuels Branch. Protect pipeline where subject to hazard or damage. Pipe Protection Pipe Protection (cont d) When the line is buried or in contact with soil, protect from corrosion by using protective coating, cathodic protection, isolation and/or any combination of methods approved by Vale. When the line is above ground and exposed to physical damage, protect by distance or barricades. When the line is exposed to corrosive atmosphere, use protective coatings. The method of protection and location are indicated on drawings. Insulation Electrical Bonding Insulation is not required for natural gas pipelines. All interior metal gas piping shall be bonded to ground in accordance with the Local electrical Safety Code..0 TESTING Testing is to be performed by the installing contractor and field witnessed by Vale Combustion Services Department, Vale Project Coordinator, or designate in accordance with TSSA Fuels Branch and CSA B-149.1, Para. 5.22, Testing of Piping, Tubing, Hose & Fittings all required paperwork are to be submitted to Vale Combustion prior to line activation by Vale Combustion. Obtain the standard Vale Limited pressure testing form and test number from Vale Combustion Services prior to setting up for test. Bubble test joints with soap leak check preliminary test at 25 psi, then at final test pressure. Testing shall be documented, gradual pneumatic test using dry, oil free air or nitrogen at 90 psi for hours minimum, and witnessed by Vale Quality Assurance representative, or his designate. Note: pressure safety valve required. If modifications to gas pipe have less than 10 welded joints, NDE on welds may be accepted in lieu of pressure test by Vale Combustion if requested. This will be considered on a case by case basis only and is not to become common practice.

8 SPEC /12 Alternately, shop-fabricated pipe spool sections may be hydrostatically (bench) tested at 11 psig. Liquid shall be swept dry afterward. A field tie-in weld may be exempt from further testing after NDE visual & magnetic particle examination and in-process leak check, with approval of the Engineer and TSSA Inspector. 4.0 EXAMINATION & INSPECTION By CWB Welding Supervisor (per CSA W47.1) familiar with ASME Section 5 and ASME B1. visual criteria or CGSB Level II inspector. Piping shall be 100% visually examined; acceptance criteria for welding shall be in accordance with CSA Z662, clause 7.2.9, Standards of Acceptability Nondestructive Testing. 5.0 CLEANING Piping systems are to be purged clear by installer following the direction of Vale Combustion Services Department. Purging for cleaning must have sufficient velocity to discharge welding slag, dirt, pieces of welding rod, etc. Cleaning should be witnessed by the Vale Project coordinator or his designate to their satisfaction. 6.0 PURGING & COMMISSIONING Purging and commissioning shall be done by the installing contractor in conjunction with the Vale Combustion Services Department, in accordance with CSA B149.1, Para 5.2, Purging of Piping, Tubing Systems and Hose after Leak Test. 7.0 CLASSIFICATION AND IDENTIFICATION The piping system shall be painted (classification) and labeled (identification) in accordance with SPEC-5001.

9 SPEC / TABLE 1 CARBON STEEL BRANCH CONNECTIONS Inches B R A N C H / / Inches /4 1/2 HEADER 1 = Equal Tee 2 = Reducing Tee = Half Coupling (Socket weld) 4 = Sockolet, Weldolet

10 SPEC / REFERENCE DOCUMENTATION The following documents were used in the development of this document or have instructions and procedures applicable to it. They shall be used in their most recent revision. SPEC SPEC-5001 SPEC-5002 SPEC-500 SPEC-5048 CSA B51 CSA B17.4 CSA B149.1 CSA B149. CSA Z180.1 CSA Z662 ASTM A5 ASTM A105 ASTM A106 ASTM A19 ASTM A179 ASTM A19 ASTM A194 ASTM A197 ASTM A24 ASTM A07 ASTM A ASTM A420 WPL6 ASTM A56 ASTM A56 ASTM B61 ASTM B62 ASTM D2000 Buried Pipelines Natural and Propane Gas Identification and Classification Piping General Requirements Welding Process Requirements Requirements for Pneumatic Testing of Piping Systems Boiler, Pressure Vessel and Pressure Piping Code Polyethylene Piping Systems for Gas Services Natural Gas and Propane Installation Code Code for the Field Approval of Fuel-Related Components on Appliances and Equipment Compressed Breathing Air and Systems Oil and Gas Pipeline Systems Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless Standard Specification for Carbon Steel Forgings for Piping Applications Standard Specification for Seamless Carbon Steel Pipe for High Temperature Service Standard Specification for Arc Welded Steel Pipe Standard Specification for Seamless Cold-Drawn Low-Carbon Steel Heat- Exchanger and Condenser Tubes Standard Specification for Alloy Steel and Stainless Steel Bolting for H Temperature Service or High Pressure Service Standard Specification for Carbon Steel and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service or Both Standard Specification for Cupola Malleable Iron Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Moderate and High Temperature Service Specification for Carbon Steel Bolts and Studs, 60,000 PSI Tensile Strength Seamless and Welded Steel pipe for Low Temperature Service Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low Temperature Service Standard Specification for Ductile Iron Castings Specification for Carbon and Alloy Steel Nuts Standard Specification for Steam or Valve Bronze Castings Standard Specification for Composition Bronze or Ounce Metal Castings Standard Classification System for Rubber Products in Automotive Application

11 SPEC /12 ASTM F7 ASTM F681 ASTM F197 ASTM F2619 ASME B1.1 ASME B ASME B16.1 ASME B16. ASME B16.5 ASME B16.9 ASME B16.11 ASME B16.21 ASME B16.25 ASME B16.4 ASME B16.9 ASME B ASME B ASME B1.1 ASME B1. ASME B6.10 MSS SP-44 MSS SP-67 MSS SP-8 MSS SP-97 Standard Test Methods for Sealability of Gasket Materials Standard Practice for use of Branch Connections Standard Specification for Factory Assembled Anodeless Risers and Transition Fittings in Polyethylene (PE) and Polyamide 11(PA11) and Polyamide 12 (PA12) Fuel Gas Distribution Systems. Standard Specification for High-Density Polyethylene (PE) Line Pipe Unified Inch Screw Threads Pipe Threads, General Purpose (Inch) Gray Iron Pipe Flanges and Flange Fittings Malleable Iron Threaded Fittings Pipe Flanges and Flanged Fittings Factory-Made Wrought Buttwelding Fittings Forged Fittings Socket Welded and Threaded Nonmetallic Flat Gaskets for Pipe Flanges Butt Welding Ends Valves Flanged, Threaded and Welding Ends Malleable Iron Threaded Pipe Unions Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series) Nuts for General Applications: Machine Screw Nuts, Hex, Square, Hex Flange, and Coupling Nuts (Inch Series) Power Piping Process Piping Code Welded and Seamless Wrought Steel Pipe Steel Pipeline Flanges Butterfly Valves Class 000 Steel Pipe Unions, Socket Welding and Threaded Integrally Reinforced Forged Branch Outlet Fitting

12 SPEC / REVISION AND TRANSITION NOTES Revision notes describe: what was changed, why it was changed, and the plan to implement the change, including whether changes are retroactive) Rev Description Revision by Approved by Issue Date YYYY/MM/DD 1 Specification updated and format and number revised. Previous number rev 10 BM 2011/11/01 BM 2011/12/ /04/26 2 Approved for use in Thompson Piping system Approval Requirements for MB updated BM 2011/11/01 BM 2011/12/ /10/02 Section 2: Changed Pressure Rating to Design Conditions, added temperature range to design and operating conditions. Section 9: Added some reference codes and/or standards that were omitted Changes are applicable to new installations or modifications to existing systems from this date forward. M.Fogarty M.Fogarty

This specification describes the minimum requirements for piping systems for the following service:

1.0 APPLICATION 2017/0/12 1/ This specification describes the minimum requirements for piping systems for the following service: Process Water or Underground Dewatering Service piping systems at pressures