Ontario ENGINEERING STANDARD SPECIFICATION. 3.1 Submit schedules showing the proposed dates for tie-ins to existing piping systems.

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1 1/ PURPOSE This specification describes the minimum requirements for the installation of a fully operational piping system in accordance applicable Codes and Vale Standards. Piping systems include process, utility and service systems. The following drawings form part of this specification: G G G G G F G G G G G G G G G Pipe Support Systems - Hanger Details Pipe Support Systems - Support Details Pipe Support Systems - Anchors, Guides & Notes Pipe Support Systems HDPE Piping Pipe Supports Underground Piping - Single Line Drafting Symbols Fire Water Piping Details Piping Rubber Lined fittings and Details Oxygen Flange Bonding Typical Water Hose Station (100 psi Rated) 4" Dia Bore Hole Casing and Seal Plate Details 6" Dia Bore Hole Casing and Seal Plate Details Process Water Pressure Reducing Station Standard Multiple Pipe Hanger Details Rabbit Ear Installation Details 2.0 PERMITS AND APPROVAL OF INSTALLATION Vale or Vale s representative will obtain approval of the design of the piping system from the appropriate authority having jurisdiction over the work. 3.0 SUBMITTALS 3.1 Submit schedules showing the proposed dates for tie-ins to existing piping systems. 3.2 Submit inspection and test plan for each line or system. Include the following: 1. Identification of piping system. 2. Testing medium. 3. Test pressure. 4. Date of test approval. 5. Signature of Test Supervisor. 6. Signature of Vale Representative witnessing test. 7. Signature of Inspector of any agency or authority having jurisdiction over the work. 3.3 When required, contractor to submit quality control documentation in accordance with Vale Engineering Standard SPEC Pressure Piping and Vessels Quality Requirements.

2 2/ Submit shop drawings of pipe spools including gaskets, isolation valves, check valves, strainers, etc. in accordance with project drawings, applicable piping standard specification and/or valve data sheets. 4.0 JOB CONDITIONS 4.1 Shutdowns and Tie-ins to Existing Systems Shutdowns and/or tie-ins to existing services and/or equipment, etc., are to be coordinated with the Vale Representative. 4.2 Protection Protect pipe ends, valves and parts of equipment left unconnected with pipe caps, plugs or wooden blind flanges to prevent damage and intrusions of foreign material. Clean off dirt and other foreign matter prior to installation. Refer to specific standard specifications for additional requirements for levels of cleanliness that may exceed this basic requirement. 5.0 MATERIALS Ensure materials are new, and free of defects impairing performance, strength, durability and appearance. Do not remove tags, name plates, marking or stenciled grades from piping materials. 5.1 Pipe, Valves and Fittings Ensure materials are as per Vale Engineering Standard specifications and drawings and are durable in the environment where they will be used. All manual isolation valves are to be compliant to the Provincial Health and Safety Code and ZES (Zero Energy State) for locking and tagging. 5.2 Pipe Supports Install supports for pipework in accordance with drawings G through , G-0045, and as listed above, and the construction drawings and specifications. Pipe supporting is also required at changes in direction, valves and in-line components. Support spacing is not to exceed the maximum spacing specified. 5.3 Attachments to Structures Use concrete fasteners (Hilti Kwik-Bolt or Hilti HKD Drop-In Anchor) in order to support piping from concrete structures. Do not drill concrete that has cured for less than 7 days. Use concrete fasteners as specified on the drawings or as recommended by the engineer.

3 3/12 Use steel fasteners in order to support from steel structure. Refer project specific requirements listed in the project specific scope of work or project drawings and listed pipe support standard specifications for attachment methods. Do not substitute from specified products without the expressed written permission or approval of the Engineer. 5.4 Steel Work Ensure structural steel supports and braces conform to the requirements of CSA S16.1 "Steel Structure for Buildings". Use welded construction whenever practical, welding must conform to the requirements of CSA W59 "Welded Steel Construction". Use ASTM A325 bolts and ASTM A563 nuts. All carbon steel added to the structure for piping and equipment support is to be painted in accordance with Vale Standard Specifications. All companies performing welding services on steel structure for buildings are to be certified to W47.1 Certification of companies for fusion welding of steel. 5.5 Start-up Strainers Unless otherwise shown on drawings, use temporary conical strainers of sufficient strength to avoid blow-out when intercepting debris. Strainers are to be installed between flanges in locations where they can be easily installed and removed for piping system start up and trail runs. Material of the temporary conical strainers is to be compatible with the liquid used to clean and flush out piping. Coordinate with Cleaning and Flushing section of this document; include strainer specifications with submittal of cleaning procedure. 5.6 Fittings Use field fabricated fittings only when specifically authorized by the Vale Representative. 6.0 PIPE INSTALLATION 6.1 General The drawings indicate the extent and general arrangement of the pipework, pipe sizes and material specifications. Run piping as indicated on the drawings. Check for interferences and make minor adjustments to routing as required to accommodate possible field interferences. Inform the Vale Representative of any field interferences requiring changes to piping design or routing of any significant magnitude. Obtain written authorization to make the required changes. Ensure that none of the piping, supports, anchors and other appurtenances obstruct passageways, walkways, access ways, reserve spaces and the like. Provide not less than 7 ft. clear headroom under piping, supports, anchors and other appurtenances (and under insulation on insulated pipelines) except where drawings expressly state some other dimension for the required headroom.

4 4/12 Provide vent (3/4" minimum) with plug or valve at all high points in process lines. Where block valves are closed in lieu of blinding, vent the line or apparatus on the low pressure side of the valve. Provide valved drain (3/4" minimum) at all low points in piping. Provide 2" minimum sized drains on slurry services. Any changes in the original design must be approved by the Engineer. Allow for expansion and contraction of the pipework as shown on drawings. In buildings, install piping parallel to the axis of the building unless shown otherwise. Bolt holes are to straddle center line, or plant north-south centerline unless shown otherwise on the drawings. Lubricate hanger rod and bolt threads, using anti-seize thread compound equal to never-seez. If the application is for corrosive acidic or caustic solutions or temperatures above 1600 F, use Never Seez Pure Nickel Special Anti-Seize compound. Refer also to the system specific standard specification, scope of work or project drawings. Submit proposed alternate compounds to the Engineer for review prior to the commencement of the project.. Commence pipe installation at the points designated by the Vale Representative. To avoid damage to the pipe or to the pipe coating during installation, lift pipes clear of the ground, do not roll or drag pipes into position. Use approved slings of nylon and polyester or equal material and of a minimum width equal to the pipe diameter for lifting or lowering pipes. Do not use nylon and/or polyester slings at temperatures above 194 F (90 C). Use alternate slings of wire, nylon, or polyester rope, Synthetic Web Slings, as deemed to be suitable for the conditions by the trained hoisting supervisor. All workers undertaking slinging (rigging and hoisting) of piping or other materials are to be competent persons who are qualified by training and experience, with current endorsements from a recognized training college or agency. All hoisting and rigging must be done in accordance with the Local Legislation for Labour, Occupational Health & Safety and Welfare of workers. Rigging operations shall be supervised by an individual of equal or greater competency. Keep piping clear of manholes, access openings and inspection points. Where pipes are to be insulated, size the piping sleeves to accommodate the outside diameter of insulation. Seal the annular space between the sleeve and the pipe or pipe insulation. If the wall being penetrated is a required fire separation, fill void with Mineral Fibre insulation and caulk both ends with a ULC listed fire stopping material. Apply fire stopping products in accordance with the manufactures approved and listed instructions. Fit pipes that pass through sleeves in the roofs with flashings. If welding fittings corresponding to pipe wall thickness are not available, use thicker fittings with ends taper bored to match pipe wall. Taper to be in accordance with the appropriate piping code (ASME B31.1 or ASME B31.3).

5 5/12 Un-insulated piping is to rest directly on supports, unless shown otherwise on drawings. For insulated piping use appropriate piping hangers, supports and anchors. Avoid contact between dissimilar metals at all times, Carbon steel hangers used on all non-carbon steel piping are to be coated with PVC, or a Teflon sheeting equal to the width of the hanger and a minimum of ¼ thick is to be applied to the hanger using construction adhesive. The installation is to completely prevent the contact of the pipe and hanger. Alternate methods to prevent contact of dissimilar metals can be proposed to the Engineer on a project by project basis. Install all pressure relief valves in an upright position, and pipe the discharge to a safe location. The discharge of the relief valve is to be minimum of one pipe size larger than the outlet for every 50 feet of equivalent length of piping (90 Elbows have an equivalent length of 10 feet, and 45 elbows have an equivalent length of 5 feet). Make sure discharge for liquid systems is not trapping any liquid. Review routing with Vale Engineering prior to installing the discharge piping. Close all open end valves with a plug, nipple and cap or blind flange. Closure to be consistent with line specification. Do not coat gaskets and flange fittings. Keep clean and dry. For typical water hose stations, use drawing G For typical fire water piping details, use drawings G For underground borehole details applicable to SPEC-35007, 35008, 35009, 35010, and 350, see standard drawings G (for 4 dia.) and G (for 4 dia.). For pressure reducing station details for process water service, see standard drawing G Fastening to Building Structure Permanent and temporary attachment of miscellaneous steel must be made to building members capable of supporting the imposed loads. The Vale Representative will prohibit unsafe practices and methods which may damage the affected building structure or other equipment. Use methods of attachment (bolting, welding, concrete inserts, "Nelson" welding studs or explosive actuated fastening) compatible with the load transmitted to the supporting structure. Welding of miscellaneous pieces of steel to structural columns and beams is permitted only to webs and longitudinally along toes of flanges. Welding across the flanges of columns and beams is prohibited.

6 6/ Pipe Welding Welding to be performed by operators qualified in accordance with ASME IX and the applicable qualified procedure. Ensure area is safe prior to welding and complies with fire protection requirements. Ensure that welds develop the full strength of the pipe and fitting and are neat, smooth and free from projections inside the pipe. Ensure that pipeline welds are a minimum of 1 pipe diameter from the adjacent weld for sizes up to 8" diameter. For pipes greater than 8" diameter this distance is to be a minimum of 1'-0. Welding of auxiliary steel, pipe supports, etc., to tanks, vessels and equipment is prohibited, unless shown on drawings. Welds are not permitted in the orifice plate run unless shown on the project drawings. Do not weld attachments in, or within a distance of 3 times the pipe wall thickness of, a welded joint. Ensure that flanges and field welds clear pipe supports by at least 12 inches. 6.4 Joints Flanged Joints Apply sufficient torque when tightening the nuts to seat the gasket and seal against the specified test pressures. Install flange bolts with anti-seize compound (molybdenum sulphide or approved substitute) on the threads unless otherwise specified in the piping system specification. For oxygen service flanged joints, use the bonding detail on drawings G Threaded Joints Make threaded joints with an approved proprietary thread tape or jointing compound unless otherwise specified in the piping system specification. Thread tape or jointing compound to have a temperature range up to 150 C. Do not use jute, rope or other similar materials. Completely remove excess jointing compound from exposed exterior of piping. Do not conceal pipe unions in walls, partitions and ceilings unless access is provided.

7 7/ Grooved Joints Ensure that pipe exterior is sufficiently free from indentations, projections, or roll marks, from the end of the pipe to the groove, to provide a leak-tight seat for the gasket. Only a qualified operator shall use approved cutting/forming tool for making grooves on pipe ends. Assemble couplings in accordance with manufacturer s recommendations Solvent-welded Joints Bonding is to be performed by Bonders qualified in accordance with ASME B31.3 Clean the mating ends of pipe joint with cleaner recommended by pipe manufacturer. Make solvent-welded joints in accordance with the pipe manufacturer's instructions Soldered Joints Use only when specified Brazed Joints Use only when specified and performed by operators qualified in accordance with ASME IX and the applicable procedures. 6.5 Connections to Equipment Make piping connections to equipment in accordance with the equipment manufacturer's recommendations and as agreed to by the Vale Representative. Support pipework in such a way that it does not place excessive loads on equipment. Do not make up piping joints under stress when attached to equipment except where "cold stress" or "cold spring" is specifically shown on drawings. Route the piping in such a way that it is clear of spaces necessary for access to and servicing of equipment, unless otherwise shown on project drawings. 6.6 Pipe Identification Refer to SPEC for piping identification, classification and labeling.

8 8/ CLEANING AND FLUSHING The following is a general guide for cleaning and flushing of piping systems. It is to be used by the contractor to write a cleaning and flushing job specific procedure job. The procedure will be submitted to Vale for review and acceptance. Refer also to specific piping system specifications for cleaning requirements that are unique to a specific system such as potable water, Oxygen piping (GOX or LOX), Breathing air, etc. and adapt the procedure to those requirements. The procedure is to be written by a qualified and competent person who is an accredited Certified Engineering Technologist or Professional Engineer. The procedure is to include quality control measures and is to be supervised by the author of the procedure who is to certify in writing that the cleaning was executed strictly according to the procedure. Perform cleaning and flushing in the presence of the Vale Representative. Provide or furnish equipment, pumps, connection, strainers, temporary equipment by-pass spool pieces, chemical cleaning agents and all other materials labour and equipment necessary to clean and flush the piping systems to achieve the desired level of cleanliness. If the cleaning procedure requires cleaning solutions to be at elevated temperatures, provide equipment required for heating solution. Supply and install, at locations according to the procedure, temporary connections and outlets for flushing. In general, ensure those locations are as close as possible to equipment in the system but without connecting to the equipment. Flushing through equipment is prohibited. For flushing and for initial running of the system, protect the equipment, if any, by supplying and installing suitable strainers. Clean the strainers if and when necessary. Remove the strainers when they are no longer required. After cleaning, remove permanent wye or basket strainers, clean and reinstall. Ensure that instrumentation and control items which may be damaged during testing or internal cleaning are not installed until testing and cleaning have been completed. On long risers, flush in the direction of gravity. Use flushing velocities of not less than the respective design operating velocities. Continue flushing each system until a one litre sample of the effluent from the flushing is clean. Dispose of the cleaning and flushing solutions in an approved manor in accordance with current environmental legislation. Notify Vale Environmental of the intent to dispose of the cleaning solution prior to commencing cleaning for advice on disposal methods. Disposal method is to be approved by the Vale Representative. After flushing, remove temporary strainers and other temporary flushing items.

9 9/12 Replace removed items in their original locations unless otherwise indicated in the piping system specification. 8.0 TESTING Provide labour, materials, equipment and supervision required to adequately perform the pressure test. Perform pressure testing of piping systems in accordance with the applicable design and installation Code, piping specification, any specific instructions and SPEC or PROC Perform tests in the presence of the Vale Representative and appropriate regulatory inspector having jurisdiction authority. Give notification to both parties, of not less than 48 hours prior to testing. Lines open to atmosphere such as vents, gravity drains, relief valve discharge piping, sewers and the like will not require pressure testing. 8.1 Sensitive Leak Test Perform the test in accordance with the gas and bubble formation testing method as specified in the Boiler and Pressure Vessel Code, Section V, Article 10, or by another method of equal sensitivity. Ensure sensitivity of the test is not less than 10-3 atm-ml/sec under test conditions. 9.0 WELD EXAMINATION Examine pipeline welds to the extent indicated in the individual piping system specification. Only visual examination of lines and systems open to atmosphere such as drains, vents and relief valve discharge lines is required. Examination only to the extent to ensure that all welds comply with good welding practice REFERENCE DOCUMENTATION The following documents are related to this specification and shall be used to their latest revision: SPEC Series SPEC-007,8,9 SPEC SPEC SPEC SPEC PROC Vale Standards Buried Pipelines Water, Sewage, Natural Gas Identification and Classification Welding Process Requirements Requirements for Pneumatic Testing of Piping Systems Pressure Piping and Vessels Quality Requirements QA Hydrostatic Testing

10 10/12 ASME B31.1 ASME B31.3 ASME IX ASME V OBC CSA Power Piping Code Process Piping Code Boiler and Pressure Vessel Code Nondestructive Examination Building Code All Applicable Canadian Standards Association Standards

11 /12.0 REVISION AND TRANSITION NOTES Revision notes describe: what was changed, and if applicable, why it was changed, and the plan to implement the change, including whether changes are retroactive. Note: The revision notes are a summary of the changes and may not necessarily be a complete list. A risk code is entered for each revision and if applicable, the revision notes will describe how risk was addressed for the revision. Risk Code A Risk Category This revision is a minor change and/or introduces no risk. B C Risk has been addressed for this revision by the reviewer and approver. Low risk or no new hazards identified. For this revision, a PHR or other risk management tool has been used to address risk and minimize hazards. This risk assessment has been documented and is available through Central Engineering. Rev 1 Revision Notes Document format and number changed due to Vale Engineering Document Program changes in 20. Previous Standard number Rev 7. Specification updated. Risk Code Approved by Reviewed by Issue Date YYYY/MM/DD --- BM BM 2012/04/30 2 General revision and clean-up. References updated. --- MDF AD 2012/09/28 3 Approved for use in Thompson MB No Changes. --- MDF AD 2012/10/ Pipe Supports revised to include the piping support drawings. Drawings G revised to include jam nuts on pipe hanger lower components A, B, C, D and P to prevent hex nuts from backing off due to vibration. This revision is applicable to all installations from this date forward. For existing installations, pipe hanger lower components A, B, C,D and P, are acceptable providing hex nuts are in place. Standard drawings G , G , G added - Added typical fire details (dwg ) and water hose station details (dwg ) - Added oxygen bonding details (dwg ) to Flanges. Reworded the purpose section - Added drawing and other Code references - Removed testing requirement as it is in SPEC and Testing Section Added reference to SPEC (Pneumatic Testing) and PROC (hydrostatic testing) and removed content specific to each document --- MDF MDF 2014/03/ MDF MDF 2014/12/ MDF MDF 2015/05/14

12 12/ Revised standard drawing G (Rev 5 is now Rev 7). Rev 6 has been omitted and Rev 7 has been archived. UG-3 has been eliminated. UG-1 angle size has been increased. Chain grade has changed from Gr40 to Gr30. Stock Code column in Table 1 and allowable mounting detail has been added. This revision is the result of an investigation from Job There are no transition details required. Installations under Rev 5 are acceptable. Format Updated Regional Approvals Removed General clerical clarifications - Valve Data Sheet added to reference section Drawing G Revised Stock Codes added to UG-1 & UG-2 as requested by Coleman mine Other minor revisions Standard Drawings G ,004494, for Bore Holes, and F for Pressure Reducing Stations, are now part of this Specification Added reference to new multi-pipe hanger and anchor drawings G-0045 & G Full review was not completed. New drawings were added to give Mines the options to (1) hang multiple pipes from a single rabbit ear and (2) attach rabbit ear angles to existing ground control bolts. Testing was done for each of the new hangers as shops. See project directory for test results. Revisions were discussed in detail with representatives from Coleman Mine. --- MDF MDF 2016/01/27 A M.Fogarty A.Delost 2016/09/02 A M.Fogarty B.Morris A B.Lavers A.Delost 2016/12/14 B B. Lavers C. Marshall 2017/10/27