REVISIONS. App Thom. App Sud. App PC 2011/12/01 BM 2011/12/01 GS 2012/10/01. Pending BM 2011/12/01 GS 2012/10/01. Pending BN 2015/02/25

Transcription

1 1/19 REVISIONS Rev Description Rev n by App Sud App PC App Thom App VB App LH App Clyd App Act Issue Date YYYY/MM/DD 1 2 Specification updated and format and number revised. Previous number Approved for use in Thompson Piping system Approval Requirements for MB updated BM 2011/11/01 BM 2011/11/01 BM 2011/12/01 BM 2011/12/01 Pending Pending Pending Pending Pending Pending 2012/04/26 Pending GS 2012/10/01 Pending Pending Pending Pending 2012/10/ Specification Reference Added Specification updated to include Stainless Steel for Corrosive environments. Spec approved for MB AD 2012/11/23 BN 201/02/19 BM 2011/12/01 BN 201/02/2 Pending GS 2012/10/01 Pending Pending Pending Pending 2012/11/23 Pending Pending Pending Pending Pending Pending 201/03/13 N/A N/A N/A HM 30 SEP 16 N/A N/A N/A N/A 30 SEP 16 Sud = Sudbury, Ontario, PC = Port Colborne, Thom = Thompson,, VB = Voisey s Bay, LH = Long Harbour, Act = Acton, England, Clyd = Clydach, Wales, N/A = Not Applicable

2 2/ PURPOSE This specification describes the minimum requirements for saturated steam and steam condensate systems at pressures above 1 PSIG and up to and including 10 PSIG. Steam systems are to be constructed either of Carbon Steel or Stainless Steel for Corrosive environments. Mixing of Carbon Steel and Stainless Steel materials is not permitted 2.0 APPLICATION Engineering design and specifications only approved for use with Vale Canada Limited, Thompson or its successor or assignee. Any use a third party makes of this document or drawing, or any reliance on or decisions to be made based on it, beyond its use for Vale Canada Limited purposes are the responsibility of such third parties. Vale Canada Limited accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this document or drawing beyond those specified herein. This specification, applies at any Vale locations indicated with approval on the cover page, with the following exceptions: 2.1 EXCEPTIONS None. 3.0 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. TH-SPEC-3001 TH-SPEC-3002 TH-SPEC-3003 TH-SPEC-3048 TH-SPEC TH-PROC CSA B1 CSA Z180.1 ASTM A3 ASTM A10 ASTM A106 Identification and Classification Piping General Requirements Welding Process Requirements Requirements for Pneumatic Testing of Piping Systems Pressure Piping and Vessels Quality Requirements Hydrostatic Testing Boiler, Pressure Vessel and Pressure Piping Code Compressed Breathing Air and 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

3 3/19 ASTM A139 ASTM A179 ASTM A182 ASTM A193 ASTM A194 ASTM A234 ASTM A307 ASTM A312 ASTM A31 ASTM A403 ASTM A36 ASTM A63 ASTM B61 ASTM B62 ASTM D2000 ASTM F37 ASTM F681 ASME B1.1 ASME B ASME B16.1 ASME B16.3 ASME B16. ASME B16.9 ASME B16.11 ASME B16.21 ASME B16.2 ASME B16.34 ASME B16.39 ASME B16.47 ASME B ASME B ASME B31.1 ASME B36.10 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 Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings and Valves and Parts for High Temperature Service Standard Specification for Alloy Steel and Stainless Steel Bolting for High 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 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 Standard Specification for Seamless, Welded and Heavily Cold Worked Austenitic Stainless Steel Pipes Standard Specification for Castings, Austenitic, for Pressure Containing Parts Standard Specification for Wrought Austenitic Stainless Piping and Fittings 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 Standard Test Methods for Sealability of Gasket Materials Standard Practice for use of Branch Connections 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 Large Diameter Steel Flanges 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 Welded and Seamless Wrought Steel Pipe

4 4/19 MSS SP-44 MSS SP-67 MSS SP-83 MSS SP-97 Steel Pipeline Flanges Butterfly Valves Class 3000 Steel Pipe Unions, Socket Welding and Threaded Integrally Reinforced Forged Branch Outlet Fitting 4.0 AND FITTINGS Design Conditions Operating Conditions Design Fabrication Installation F to 366 F Lowest rated component in system) F to 366 F In accordance with this specification and TH-SPEC-3002 TH-SPEC-3003 TH-SPEC CSA B1 ASME B31.1 Piping General Requirements Welding Process Requirements Pressure Piping and Vessels Quality Requirements Boiler, Pressure Vessel and Pressure Piping Code Power Piping Approvals ONTARIO: Steam piping systems subject to the approval of TSSA, Boilers and Pressure Vessels Safety Division. MANITOBA: Piping systems are subject to the approval of the Office of Fire Commissioner, Inspection and Technical Services Section, Steam and Pressure Plants Act. NEWFOUNDLAND: Piping systems are subject to the approval of the Newfoundland & Labrador, Department of Government Services, Public Safety Act, Boiler, Pressure Vessel and Compressed Gas Regulations.

5 /19 Pipe 1 1/2" & Below: Carbons Steel: Schedule 80 per ASME B36.10, carbon steel ASTM A3 Gr. B, ERW, T & C ends. Stainless Steel: Schedule 80S, ASTM A312 Gr. TP316L ERW or Seamless, threaded ends to ASME B " through 12": Carbon Steel: Schedule 40 per ASME B36.10, carbon steel ASTM A3 Gr. B, ERW, beveled ends Stainless Steel: Schedule 40S, ASTM A312 Gr. TP316L ERW or Seamless, beveled ends 14" through 16": Carbon Steel: 0.37" thick wall per ASME B36.10, carbon steel ASTM A3 Gr. B, ERW, beveled ends. Stainless Steel: 0.37 thick wall, ASTM A312 Gr. TP316L ERW, beveled ends 20" through 30": Carbon Steel: 0.37" thick wall per ASME B36.10, carbon steel ASTM A139 Gr. B, DSAW, beveled ends. Stainless Steel: 0.37 thick wall, ASTM A312 Gr. TP316L, ERW, beveled ends. Fittings 1 1/2" & Below: Carbon Steel: Class 300 malleable iron per ASME B16.3, ASTM A197, screwed and banded Stainless Steel: Class 3000 forged, ASTM A182 Gr. F316, threaded to ASME B1.20.1

6 6/19 2" through 12": Carbon Steel: Schedule 40, per ASTM A234 Grade WPB, butt weld prep per ASME B16.9. Stainless Steel: Schedule 40S, ASTM A403 Gr. WP316L seamless or welded fitting, butt weld to ASME B " & Above: Carbon Steel: 0.37" thick wall, per ASTM A234 WPB, butt weld prep per ASME B16.9. Stainless Steel: 0.37 thick wall per ASTM A403 Gr. WP316L Seamless or welded fitting, butt welded to ASME B16.9 Butt weld elbows - Long radius R = 1 1/2 x dia. unless otherwise noted. Note: In areas where leaks cannot be tolerated, lines 1 1/2" and below will be socket welded construction. See Branch Connections Branch Connections See Table 1 Attach to run pipe by full penetration welds. Carbon Steel: Threaded and socket weld half couplings, Class 3000 per ASME B16.11, forged carbon steel ASTM A10 Thredolet and sockolet, Class 3000 per ASME B16.11 and MSS SP-97, forged carbon steel ASTM A10 Weldolet, Extra strong per ASME B16.11 and MSS SP-97, forged carbon steel ASTM A10 Stainless Steel: Use class forged, ASTM A182, Gr. F316L threaded or socket weld half couplings. Use Standard & Class 3000 forged stainless steel ASTM A182, Gr. F316L weldolets and threadolets.

7 7/19 Flanges 1 1/2" & Below: Carbon Steel: Class 10 raised face, threaded, forged, ASTM A10 to ASME B16.. Stainless Steel: Class 10 raised face, threaded, forged, ASTM A182 Gr. F316 to ASME B16.. Use flanges 1 ½ and below only for connections to flanged equipment 2" through 24": Carbon Steel: Class 10 slip-on or welding neck type, raised face, forged steel ASTM A10 to ASME B16.. Stainless Steel: Class 10 slip-on or welding neck type, raised face, forged stainless steel, ASTM A182 Gr. F316L to ASME B16. Bore of welding neck flanges to suit pipe ID. 26" through 36": Carbon Steel: Class 10 welding neck type, raised face, forged carbon steel ASTM A10 / MSS SP-44. Stainless Steel: Class 10 slip-on or welding neck type, raised face, forged stainless steel, ASTM A182 Gr. F316L to ASME B16.47, MSS SP-44. Bore of welding neck flanges to suit pipe ID. Note: Flat faced flanges required at cast iron valves and flanges, for all sizes. Pipe Joints Threaded Joints Do not use wet sealants. Use teflon tape.

8 8/19 Flanged Joints Gaskets: 1/16" thick ring type - inside bolts, non-asbestos, carbon fibre, nitrile bonding. Dimensions to ASME B Gasket dope is not permitted. Manufacturer's gasket material recommendation subject to Vale approval. Flange Bolting Carbon Steel: Alloy steel stud bolts to ASTM A193 Gr. B7, threaded full length, with semi-finished heavy hex nuts to ASTM A194 Gr. 7 with Class 2A fit on bolts and 2B fit on nuts. Dimensions to ASME B1.1, and B Stainless Steel: Stainless Steel bolts to ASTM A193 Gr. B8M UNC threads with heavy series hex nuts to ASTM A194 Gr. 8MA, with class 2A fit on bolts and class 2B fit on nuts. Dimensions to ASMEB1.1, B and B Welded Joints Carbon Steel: Essential variables to be in accordance with Vale TH-SPEC 3003, 2 to 6 WP3 8 to 30 WP1 Stainless Steel: Essential variables to be in accordance with Vale TH-SPEC- 3003, 2 to 6 WP6 8 to 30 WP4. Unions 1 1/2" & Below Class 300 malleable iron per ASME B16.39, ASTM A197, ANSI/ASME B16.39, brass to brass seats, ground joint, threaded ends to ASME B Stainless Steel: Do Not Use Use flanged Connections

9 9/19 Gate Valves* 1 1/2" & Below: Carbon Steel: Class 10, bronze body ASTM B62, solid wedge disc, union bonnet, rising stem, inside screw, hand wheel operated, threaded ends to ASME B Valves to be lockable. Stainless Steel: Class 600, Cast stainless steel body to ASTAM A31 Gr. CF8M. All internals to be Stainless Steel. Threaded ends to ASME B Valves to be lockable. Alternate where socket welded construction is required. Carbon Steel: Class 600, forged steel body ASTM A10, wedge disc, 13% chrome trim, outside screw and yoke, rising stem, bolted bonnet, socket weld ends. Valves to be lockable. Stainless Steel: Class 600, forged Stainless Steel body to A182 Gr. F316, All internals to be Stainless Steel, bolted bonnet, socket weld ends. Valves to be lockable. 2" & Above: Carbon Steel: Class 10, cast steel body ASTM A216 Gr. WCB, outside screw and yoke, rising stem, flexible wedge disc, flanged ends, raised face per ASME B16.. For welded construction, butt weld ends to ASME B16.2. Valves to be lockable. Stainless Steel: Class 10, Cast stainless steel body to ASTM A31 Gr. CF8M, outside screw and yoke, rising stem, flexible wedge disc, flanged ends, raised face per ASME B16. For welded construction, butt wed ends to ASME B16.2. Valves to be lockable.

10 10/19 Globe Valves* 1 1/2" & Below: Carbons steel: Class 10, bronze body ASTM B62 hard disc, union bonnet, inside screw, threaded ends to ASME B Valves to be lockable. Stainless Steel: Class 600. Cast stainless steel body to ASTM A31 Gr. CF8M, OS&Y. Threaded to ASME B Valves to be lockable. Alternate where socket welded construction is required. Carbon Steel: Class 600, forged steel body ASTM A10, 13% chrome trim, outside screw and yoke, socket weld ends. Valves to be lockable. Stainless Steel: Class 600, forged Stainless Steel body to A182, Gr. F316, All internals to be Stainless Steel, socket weld ends. Valves to be lockable 2" & Above: Carbons Steel: Class 10, cast steel body ASTM A216 Gr. WCB renewable seats and disc, outside screw and yoke, flanged ends, raised face to ASME B16.. For welded construction, butt weld ends to ASME B16.2. Valves to be lockable. Stainless Steel: Class 10, cast Stainless Steel body to ASTM A31 CF8M, renewable seats and disc, outside screw and yoke, flanged ends, raised face to ASME B16.. For welded construction, butt weld ends to ASME B16.2. Valves to be lockable

11 11/19 Check Valves 1 1/2" & Below: Carbon Steel: Class 200, bronze body ASTM B61, swing check, bronze disc regrind seat, 200 PSIG saturated steam rating, threaded ends to ASME B Stainless Steel: Class 600 Cast stainless steel body to ASTM A31 Gr. CF8M, All Stainless Steel internals, threaded ends to ASME B Alternate where socket welded construction is required. Carbons Steel: Class 600, forged steel body ASTM A10, 13% chrome trim, lift check, bolted cap, socket weld ends. Stainless Steel: Class 600, forged stainless steel body to ASTM A182 Gr. F316, All Stainless Steel internals, lift check, bolted cap, socket weld ends. 2" & Above: Carbon Steel: Class 10, cast steel body ASTM A216 Gr. WCB, 13% chrome trim, swing check, renewable seats and disc, flanged ends, raised face to ASME B16.. For welded construction butt weld ends to ASME B16.2. Stainless Steel: Class 10, cast stainless steel body to ASTM A31 CF8M, All Stainless Steel internals, swing check, renewable seats and disc, flanged ends, and raised face to ASME B16.. For welded construction butt weld ends to ASME B16.2 Safety Relief Valves Selection by the Engineer. Pressure Reducing Valves Selection by the Engineer.

12 12/19 Traps Selection of traps shall be based on required capacity, location and rating. Drip Leg Service - Thermodynamic type steam trap, Class 600 complete with integral strainer and blow-off connection, screwed ends. Modulation Service - Float and thermostatic steam trap, Class 10 complete with air vent, in-line screwed ends. Strainers For areas where water hammer is a concern, substitute b1- metallic traps in float and thermostatic style. 1 1/2" & Below: Class 20, iron body, Y-Type sediment separator, 40 mesh monel screen, screwed cap complete with blow-off connection and plug, threaded ends to ASME B Stainless Steel: Class 600 stainless steel body to ASTM A31 Gr. CF8M, All stainless steel internals, Y-Type strainer, screwed cap complete with blow-off connection and plug, 1/32 perforated Stainless steel screen, Threaded ends to ASME B " & Above: Carbon Steel: Class 10, cast steel body, Y-Type sediment separator, 40 mesh monel screen, bolted cover complete with blow-off connection and plug, flanged ends to ASME B16.. Stainless Steel: Class 10, stainless steel body to ASTM A31 Gr. CF8M, All stainless steel internals Y-Type strainer, bolted cover complete with blow-off connection and plug, 1/32 perforated stainless steel screen, flanged ends to ANSI B16.

13 13/19 Instrumentation Isolating Valves Carbon Steel: 1/2" Gate Valves Class 600, forged steel body ASTM A10, 13% chrome trim, outside screw and yoke, threaded ends to ASME B Valves to be lockable. Stainless Steel: 1/2" Gate Valves- 600 lb. Forged stainless steel body to ASTM A182, Gr. 316L, All stainless steel trim, outside screw and yoke, threaded ends to ASMA B Valves to be lockable. *Note: Gate Valves, Globe Valves, Check Valves, and Instrumentation Isolating Valves to have 10 PSIG saturated steam minimum rating except where noted otherwise and a stem blow out retainer where applicable..0 TESTING Testing must meet the requirements of ASME B31.1and TH-PROC (hydrostatic testing) or TH-SPEC-3048 (pneumatic testing - only at the discretion of the Engineer) and specific instructions in the scope of work. Test Pressure Duration Additional Requirements 22 PSIG 10 minutes none 6.0 EXAMINATION AND INSPECTION Examination and inspection must meet the requirements of ASME B31.1 and specific instructions in the scope of work. Minimum 100% visual examination for pressure welds or welds to pressure retaining components and a complete inspection. 7.0 PAINTING - PIPE SYSTEM CLASSIFICATION AND IDENTIFICATION The piping system shall be painted (classification) and labeled (identification) in accordance with TH-SPEC Do not paint insulated piping. Do not paint Stainless Steel. 8.0 CLEANING Not all of the following cleaning procedures are required for any given project. Use the level of cleanliness, type of cleaning procedure and the sequence as specified on the drawings.

14 14/ FLUSHING Following completion of hydrostatic testing, drain the test fluid at a rate of flow sufficient to flush any debris or foreign materials from the system. 8.2 BLOWING OUT Vent the steam system to atmosphere, in a safe location, by blowing steam at line pressure through the system and venting, either horizontally or vertically downwards, through full line sized vents, until it is visually evident that discharge of foreign particles has stopped. 8.3 WIRE BRUSHING Prior to blowing out, clean the line by drawing through a wire brush, sized to the full diameter of the line, until no particles remain. 8.4 ACID CLEANING Mix cleaning solutions on site or deliver premixed. Ensure acid cleaning is done by an approved cleaning contractor. Prior to blowing out, degrease and descale the system as follows: Caustic Flush Make up the caustic solution in the following proportions: For every 1,000 gallons of water - 12 gallons of liquid caustic or 840 pounds of flake caustic, and 400 pounds of Trisodium Phosphate. When the auxiliary tank is filled with water, add the caustic in the proportions specified, making sure that all solids are dissolved. Trisodium Phosphate has limited solubility in cold water, therefore, in cold weather or in systems with many small bore pipelines, it is advantageous to reduce the amount of this chemical by half. This greatly reduces the amount of Trisodium Phosphate that precipitates and prevents "freeze-ups" in the lines. Heat the caustic solution till a temperature of about 140 deg.f is obtained. Start circulation. Maintaining the temperature of 140 deg.f, circulate for a minimum of 4 hours. Check lines for proper circulation by checking the temperatures.

15 1/19 Treat leaks with caution and do not attempt to correct any during circulation. Check high points in the piping during the caustic flush to ensure the system remains full of solution Water Flush Use water to flush the solution in the system back into the pickling tank for disposal. Continue to flush the system with water allowing the discharge to collect in a holding tank. Flush for one half to one full hour or until discharge is neutral Acid Flush Make up the acid solution in the following proportions: For every 1,000 gallons of water gallons 66 Be Sulphuric acid, gallons of inhibitor such as Houghton "ACITROL", and water soluble foam suppressant as required. Heat the acid solution with live steam till a temperature of 140 deg.f is obtained. Circulate the hot acid solution through lines for a minimum of 4 hours and maintain solution temperature at 140 deg.f. Check lines for proper circulation by checking the temperatures. Treat leaks with caution and do not attempt to correct any during circulation. Check high points in the piping during the acid flush to ensure that the system remains full of solution. Immerse a heavily scaled or rusted piece of metal in the pickling tank and use this as a measure of the descaling rate of the solution Water Flush Use water to flush the solution in the system back into the pickling tank and then pump out for disposal. Continue to flush the system with water allowing the discharge to collect in a holding tank. Flush for one half to one full hour or until discharge is neutral. Test with litmus paper.

16 16/19 Keep lines full of water to prevent air from contacting the cleaned surfaces until the system is blown out. Note: Ensure cleaning takes place immediately prior to line being placed in service so that no corrosion is allowed to take place during this interval. 8. DISPOSAL Discuss with and obtain approval from the Vale Representative for the disposal of all cleaning fluids. If solutions are disposed of in Vale sewer system or treatment system, the solutions must be neutralized prior to disposal.

17 17/ TABLE 1 BRANCH CONNECTIONS Inches B R A N C H / / Inches /4 1/2 HEADER 1 = Equal Tee 2 = Reducing Tee 3 = Half Coupling (Threaded or socket weld) 4 = Threadolet, Sockolet, Weldolet = Stub in 6 = Stub in requiring branch reinforcement 7 = 4 deg. Stub in requiring reinforcement 90 deg. Stub in does not require reinforcement

18 18/ APPENDICES Appendix A: Revision and Transition Notes Appendix B: Keywords

19 19/19 Appendix A: Revision and Transition Notes (Revisions are listed in reverse chronological order with most recent revision at the top. Revision notes describe: what was changed, why it was changed, and the plan to implement the change, including whether changes are retroactive) Revision Approved for Section 3: Reference documentation added. Section 4: Referenced SPEC-3003 and SPEC Revision 4 Stainless Steel option added for Steam 10 PSIG in corrosive environments. Some re-formatting in Section 4,,6 &7 (no technical change) Revision 3 SPEC added to Reference document section. No technical changes. Revision 2 Approved for use in Thompson. Piping system approval requirements updated for. Revision 1 Document format and number changed due to Vale Engineering Document Program changes in Previous Standard number Rev. Specification updated SPEC-3020 Appendix B: Keywords