asme general question - 100

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ASME (63) kc445

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kc445 2007.04.12 09:21

(367) HSBCT (21) ASME (63) (Design) (29) (Welding) (89) (NDE) (16) HRSG (14) (21) (12) QA SYSTEM (34) Question & Ans wer (0) PED (34) KEPIC (10) (2) ASME Certificate (4) (9) Nuclear Power Plant(4)

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FABRICATION INSPECTION & TESTING OF PIPINGkc445 2007.03.28 10:45


SUBJECT : FABRICATION INSPECTION & TESTING OF PIPING 1. SCOPE Specification chemical plant Shop , . 2. CODES AND SPECIFICATIONS Code ASME/ANSI B31.3 latest edition and addenda. ANSI SPEC SPEC . Code ANSI B31.3 . Piping Korea Regulation, Code, Standard 3. MATERIALS 3.1 P-number Spec "P-number" "P-number" Code Stress Table List Section IX,Welding and Brazing Qualification,of the ASME Boiler and Press Vessel Code . 3.2 Filler Metal Deposited Weld Metal Filler Metal AWS Spec Metal Alloy Content . Tensile Strength . S.S grade Weld Metal Joint . Type 321 S.S Type 347 Weld Metal Joint . 3.3 Backing Ring Backing Ring Pipe Metal Analysis Ferrous Ring : S P 0.05% . Free-Machining Grade of Steel Backing Ring . 3.4 Reinforcing pad Reinforcing pad pipe one piece. 4. Design considerations 4.1 Field Weld Field Weld Testing . temporary support . 4.2 Longitudinal Seam location of welded pipe Welded Pipe Longitudinal seam offset . 180 Pipe 6 . Seam Opening Clear . 4.3 Acceptable types of branch connections JOB SPECIFICATION . 4.4 Reinforcing pad for pressure openings

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http://blog.daum.net/kc445/3718504[2011-08-31 10:25:38]

Pressure Vessel Design Charts Pressure Opening Reinforce Pad . hole Testing Venting NPT(tap) . Hole 180. Structural Attachment Reinforce Pad Vent Untap 6.4mm Hole . two piece piece hole . 4.5 Galvanized carbon steel attachments Lug support stainless steel . 5. PREPARATION FOR WELDING 5.1 Surfaces for welding paint,oil,rust,scale cleaning . Welding Coating Pipe Zinc AL . 5.2 The ends of pipe Pipe Pipe Plate . . Cr 5% Steel Flame Cutting . 5 Cr Mo or high alloy Steel Flame Cutting Machine-Guided Flame Cutting 5.3 Arc and flame cut deges 1 Cr Mo Arc Flame Crack . MT PT . 5.4 The ends of pipe SW Valve,Flange Fitting Pipe Machine Cut .(grinding ) 5.5 Branch connection joints Piping System Quality . 5.6 Parts susceptible to damage by heat Weld end V/V(Ball V/V ) . 6. ALIGNMENT 6.1 Joint alignment Code . ,Misalignment 1.6 Offset Trimming .(1 : 3 Taper) 6.1.1 C.S 6.1.2 300# 6.1.3 23% 6.1.4 Service Vibration . 6.2 Root Gap Welding Procedure Root Gap : 3.2 1.6 (Branch Conn. ) Pipe wall thickness 4.8 Root Gap : 1.6 Non-Consumable Insert Joint : 4.81.6 6.3 Reinforcement pad Root Gap(Pipe Pad ) : 3.2 . Reinforce Pad Pipe Gap : 1.6 . 6.4 Flange bolt holes Equip F/L F/L bolt hole centerline . 6.5 Slip-on Flange So-Flange F/L Pipe Nominal Pipe +3.2 . Code Fig 327.4.2B 2 point weld . F/L Refacing Seal Weld . 6.6 Socket welding construction S.W Pipe Socket Gap 1.6 S.W SO-Flange Fillet Code . 6.7 Welding neck orifice flanges W.N orifice F/L pipe welding pipe smooth . 6.8 Socket and butt weld end gate valves V/V . V/V .( Procedure V/V ) butt weld V/V ANSI B16.25 inside outside beveling . Weld Overlay Notch Valve Body smooth . 7. Tolerances for welded pipe 7.1 face to face, center to center dimension face to face, center to center dimension : 3.2

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Pressure Vessel Design Charts tolerance . 7.2 flange Flange flange 1.6 . Flange Alignment 0.8 . 8. Welding 8.1 Welding procedure procedure Code qualify . 8.2 Welding procedure test design demo. 8.3 Welder/Welding Operator Qualify Welder/Welding Operator Qualify 8.3.1 Welder Code section of the ASME Boiler/Pressure Vessel Code qualify . 8.3.2 Code section of the ASME Boiler/Pressure Vessel Code qualify. Contractor JOB Qualify Welder Requalify . 8.4 Circumferential butt joints double welding backing ring single welding : Single Vee Joint Root Pass gas tungsten arc welding(GTAW/TIG) 8.5 on-Consumable Back Ring Non-Consumable Back Ring Non-Consumable Backing Ring . Back-Ring Ring Upstream Fillet Pipe Wall . Non-Consumable Backing Ring Piping Code Fig 328.3.2 of the Code . 8.6 Lack of penetration grinding back chipping inside . finished joint thickness min. design thickness + corrosion and erosion allowance . 8.7 Seal welding of threaded connections Seal welding of threaded connections . 8.7.1 threaded joint threaded joint cutting oil ( or tape ) 8.7.2 weld metal weld metal thread . seal weld : 2 pass (3 pass ) welding rod : 2.4 or 3.2 8.7.3 seal welding seal welding threaded joint strength throat dimension 9.5 . 8.8 symbol weld pressure welder identification symbol . -29 ferritic materials ink stencil welder symbol . steel stamping . 9. Preheat requirements of welds 9.1 applications Code 331.2 recommend Welding Procedure Qualification 0C . ------------------------------------------------------------------------------ Code 331.2 preheating of materials 331.2.1 General Welding Eng'g Design Procedure Qualification . P-NO materials min. temp Table 331.2.1 . 0 Table 331.2.1 . Table 331.2.1 th'k joint th'k 331.2.2 Preheating dissimilar metals Qualified Welding Procedure eng'g design . Table 331.2.1 . 331.2.3 Temp temp indicating crayon, thermocouple 331.2.4 butt-weld,fillet weld,socket weld,repair weld,tack weld threaded joint seal weld weld .


Pressure Vessel Design Charts ------------------------------------------------------------------------------9.2 Min. Preheat Code Table 331.2.1 Min. Preheat P-4 material 150, P-5 material 175 . material Qualify Welding Procedure . 9.3 . 10. Postweld heat treating requirements 10.1 PWHT PWHT Code, . materials Code Table 331.3.1 PWHT . 10.2 welding procedure welding procedure qualify pwht procedure PWHT . 10.3 MEA Service PWHT MEA Service P-1 materials PWHT Caustic Service P-1 Mat'l JOB SPECIFICATIONA . Caustic MEA Service PWHT Welding . Equipment PWHT-DO NOT WELD" . 10.4 welding welding(butt, socket, branch conn, seal) Hservice P-4, P-5 mat'l PWHT . 10.5 HService PWHT HService P-4 P-5 Mat'l Joint(Lug, Pipe Support ) PWHT HService P-1 Mat'l PWHT . , Code . 10.6 Service Pressure/Nonpressure PWHT Service Pressure/Nonpressure PWHT Specify Code . 10.7 stress relieve piping pipe pad(alloy c.s) . pad attachment 10.8 dissimilar metal joint PWHT dissimilar metal joint PWHT Procedure Qualification 10.9 C.S alloy mat'l PWHT C.S alloy mat'l (austenitic S.S ) PWHT Alloy Mat'l . 10.10 C.S Austenitic S.S PWHT C.S C.S Austenitic S.S PWHT . 11. Heat Treating Procedures 11.1 PWHT PWHT qualify accept Code Table 331.1.1 . 11.2 PWHT PWHT furnace . (local) exothermic kit electrical resistance induction methods . 11.3 welded end valves PWHT welded end valves PWHT tag . welded bonnet welded end valve local . valve gland,packing trim . 11.4 local pipe . 11.5 local . . 11.6 Exothermic Kit PWHT Exothermic Kit PWHT Steel . 11.6.1 PWHT procedure Exothermic kits PWHT procedure temperature range,holding time,cooling rate . 11.6.2 Exothermic kits Exothermic kits manufacturers instruction . 11.6.3 Kit ignition 10 . 11.6.4 16/h 16/h flame manufacturer Instruction


Pressure Vessel Design Charts exothermic kit sealing blanket .

12. Pipe Bends 12.1 Code Hot Cold Code 332 . 12.2 bend Code bend . 12.3 bend wrinkle(),bulge(),kink() . wall th'k . 12.4 RADIUS bend pipe center line 5 . 12.5 wall th'k & bending radii PFI(pipe fabrication institute) Standard ES-24( ) . recommandation carbon low Cr alloy steel sand filled hot bend . 12.6 Hot Formed Bend Code bending . Code P-NO 3.4.5.6.10A 10B Mat'l . 12.7 Cold Formed Bend Code Bending . 12.7.1 -29 C.S 12.7.2 MEA Service C.S 12.7.3 JOB SPECIFICATION PWHT Caustic Service C.S 13. Inspection 13.1 fabrication procedure piping mat'l fabrication procedure inspection vendor 10 Project Engineer . 13.2 . weld pass inspector option . structural attachment weld . 13.3 non-cyclic, non-pulsating service Code 341.4.1 Table 2 . NOTE pipe fitting Code ASTM spec . table pipe . UT RT . branch connection weld RT,UT . MT LT ( percentage) . -29 C.S Piping 100% RT . jacket piping jacket 100% RT . 13.4 connection . RT UT branch connection welds +.Ferrous Weld : MT +.Non-Ferroud Weld : PT . +.MT PT root pass outside finish surface . 13.5 point random,spot,100% RT Code 344 . 13.6 . 13.7 girth weld girth weld . 13.8 girth weld source . 13.9 girth weld source ( 15) (source pipe shooting 4 pipe dia ) . pipe joint . 13. 10 PT root pass or cover pass PT 15~52 . table random spot RT inspector point pulsating cyclic service girth,socket,branch connection Code 341.4.3


Pressure Vessel Design Charts dye penetration . 13.11 RT, MT, PT PWHT . MT PT . 13.12 Repair Weld Repair Weld ,, . 13.13 forged areas pipe bends crack surface lamination MT PT( Inspector ) . 13.14 weld,hot formed,hot bent piping test Code table 331.1.1 . Table 331.1.1 C.S austenitic S.S test . 13.15 test test . test . test circumferential weld length 380mm 1 point . 13.16 mat'l alloy weld alloy piping component(pipe,fittings,flange,nipple) mat'l . spec fabricator contractor weld piping component . 14. Testing 14.1 test . inspector weld quality pipe shop test . 14.2 test ppm chloride 6.5 PH . chloride test sodium nitrate . test water level PH . 0.1% (3.8 of sodium nitrate per 1000 gallons) 400 ppm chloride,8PH . 14.3 Test Piping class 33 Code Test . 14.4 reinforcing pad pressure opening reinforcing pad 1.8/ air shop test . pad weld : . test opening test pulgging . 15. Cleaning after fabrication Shipping Pipe , .(loose scale,weld spatter,slag,sand,other foreign material) PFI Standard ES5 standard Acceptable. 16. Shipping 16.1 shipment shop field shipment welding bevel,socket weld end,gasket thread 300 series stainless steel nickel alloy steel equipment test 30 shop fabricated piping test dwg purchase order shop

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Pressure Vessel Design Charts

ASME General Question - 100kc445 2007.03.27 18:29


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