juH > De' > 'a ghIH
yan Pipelines Refinery Piping 'ej Techniques Welding contrasting
Mar 12, 2016

HeghDI' legh wa' 'ej SIp installation rur refinery yotlhmeyvo' across law' acres 'ej dollars luch infrastructure investment 'ej 'uy' 'oS nuj tInqu' ghaj oil, 'u' nuHmey oil tlhol injected refine mIw refinery legh wa'. ghu'vam SeH lup 'u' nuHmey oil vegh pipeline wutlh. pump yaH vaj pipeline oil baS pumps je Sam Hop Ha' vo' refinery.

'ach wutlh pipeline aboveground refinery 'ej pa' wa' ngoQ. ghaH refine oil latlh products 'ej DuHIvDI' public. 'u' nuHmey oil lup pipeline 'ej refinery 'u' nuHmey oil refining.

'e' weld techniques complementary tlham wo' 'e' entirely opposite to Hoch latlh Sovlu'chugh Daj. lo' downhill weld techniques pipeline welding whereas lo' uphill welding refinery piping pat welding. vabDot ngoq weld je inspection methods pIm. yISeH pipeline welding pong api 1104 whereas yISeH refinery piping Qap pong asme Sec ix.

qaStaHvIS ghItlhvetlh yavvetlh wa' pong wa' ja'chuq chay' 'ej qatlh differ vo' Hoch latlh cha' weld methods. tlha' lom nolwI'pu' 'elbogh mIchHom nuqDaq difference mostly vItu': 1.) weld pemvaD, 2.) clamps, 3 lo'.) technique, 4 welding.) ngoq motlh, 5 'ej.) electrode coating 'ej 6.) welding speed.

weld pemvaD

pipe thickness pipeline lo' motlh puqvaD choHwI'maj qaStaHvIS refinery piping vaj pipe Qav 'oH pipeline beveled whereas manually pe' 'ej beveled pipe Dor refinery piping pemvaD HablI'. chaH Dapon 'e' yI role, qaStaHvIS opposite weld techniques qIlmeH pIj chu' cha' factors.

qaSchoH pipe Qav 'oH pipeline pipe HablI' laSvargh 'ej Hab, ngeD lo' wa'DIch internal clamp pipeline pemvaD HIp 'oQqar gap HurDaq tacks vaj downhill technique (Figure 1) welding pol van cha' tlhIH lIS DeghwI' Dunmo' wIv speedy welding. qaStaHvIS contrast. ghaH in the case of refinery piping, wej neH pipe thickness matay'DI' 'ach je handmade bevels wej vaj Hab. je lo' tack welds instead of clamps 'ej 'oQqar gap je HIp as in pipeline pemvaD case. vaj wIv Dunmo' uphill technique (Figure 2) welding.

wa' meqmo' neH 'oQqar gap yav pipeline piping weld pemvaD je jojDaq size. as compared to 3 mm neH piping weld pemvaD (Figure 4) 'oQqar gap pipeline pemvaD puS 1.6 mm (Figure 3). laH Hergh welded pemvaD je smaller 'oQqar gap je downhill technique, cha' tlhIH 'oQqar qab, fusing whereas gaps 'oQqar 'u' weave ghotvetlhDaq electrode cha' tlhIH 'oQqar qab fuse bImejnIS.

Clamps lo'
welded cross-country pipelines bogh yotlhmeyvo' qelI'qam right-of-way. loQ contrast qeq 'ej welded qaStaHvIS workshop poch piping pemvaD. weld Qu' pemvaD ram Qu'maj mung je factor pol.

lo' qoD pipeline pemvaD speedy alignment 'ej laH quSmey teqlu'pu' cha'DIch pItlh pipe wa'logh 'oQqar 'ej tuj naQmoH wanI'mey internal clamp (Figure 5). whereas muHIvtaHbogh ngaj 'ej wanHa' 'ab piping pemvaD fittings ghaj, qaSmoHlu' weld pemvaD pagh HurDaq external clamps lo'.

latlh difference tacks lo'. pemvaD pipeline, lo' pagh tacks je 'oQqar 'ej naQ tuj juS SIbI' SuvrupDI' internal clamp qaStaHvIS Daq whereas in the case of piping poch, DanoHmeH weld tacks weld pemvaD qeq weld DeSDu' mIw later.

Technique welding

Hoch QIj earlier pe'vIl Heghbogh vajpu''e' ghaH qatlh welded pipelines downhill technique lo' je piping je uphill technique, qaStaHvIS downhill technique cha' welders wa' pemvaD simultaneously vo' yor pipe opposite Dop bIS'ub weld whereas neH piping pemvaD job, naQ pemvaD welding vo' pe'lu' pemvaD piping yor naQ wa' welder.

ngoq motlh je

Hoch Sep earlier, much pipeline welding with respect to api 1104 ngoq poch welding asme Sec ix je.

pipeline, 'uchtaH welder waH 'ay' neH SaS position (Figure 7) whereas 'uchtaH waH 'ay' poch piping welder qaStaHvIS 45 qechmeyDaj Huj position (Figure 8). ghu'vam SeH chenmoH pipeline welds neH position SaS 'ej qeng piping welds 'e' yIQoy qaStaHvIS SaS, chong 'ej DeSDu' 45 qechmeyDaj Huj tajvaj positions.

waH destructive coupons je pIm techniques Hoch Figure 9 Figure 10 'ej cha'.

electrode Coating
downhill welding, Hoch electrodes, yIlo' cellulose wep whereas uphill welding cellulose electrode 'oQqar juS lo' rIn coating 'ej meqchaj 'eS bIQSIp-wep electrodes. tlhIvmo' meq 1) pipeline tlhoy' thickness, baS roD qup HoS 12.5 mm; 2) slag ngeD removal; 3) speed 'ej 4 welding) lang bead cellulose electrode. Hoch roD requirements pipeline welding whereas neH poch pipe thickness piping matay'DI', vaj poQ weave ghotvetlhDaq electrode 'ugh thickness piping pemvaD weld. ngoQ lo' 'eS-bIQSIp electrodes.

Speed welding

Qav – 'ach, wej least – tIn difference DuqIppu'chugh pipeline poch piping welding SuvwI' weld production speed. naDev 'oH 'op qaStaHvIS weld speed difference meq:

1. lIS neH workshop tacked piping pemvaD 'ej motlh pemvaD naQ naQ wa' welder welding 'oQqar, filling 'ej yuvtlhe'. whereas 'etlhmey cross-country pipeline, lIS pemvaD internal clamp Daq 'ej much welding pong team mostly cha' 'oQqar welders juS, welders juS cha' tuj, welders juS cha' chaw'nIS 'ej welders cha' yuvtlhe'.

welding opposite DopDaq pipeline pemvaD, qatlh much cha' tlhIH welders 'ej qaStaHvIS mInDu'lIj jejlaw' caravan vIH weld beq. Hoch ghot'e', production speed welding be'nI'puqDaj neH piping pemvaD neH workshop welded.

2. pipeline nuqDaq mostly 12 mm pipe thickness pagh qup, whereas matay'DI' thickness uphill welding technique 'ej piping pemvaD latlh poH poQ QaQ weld production naQ downhill welding technique; vaj, weld production qup as compared to pipeline.

3. latlh meq Saghmo' speeds pipelines welding electrode movement vo' yor pIrmuS je ghaH pagh weave ghotvetlhDaq. whereas vIH electrode vo' pe'lu' yor piping pemvaD 'ej weld speed slows, weaving electrode.

author
engr. m. younas malik
'um mechanical jonpIn ben DuSaQ'a'Daq DawI' SoH jonpIn je cham, lahore, pakistan, 'ej b.s. qechmeyDaj Huj technical education vo' polytechnic DuSaQ cher oklahoma Sep ben DuSaQ'a'Daq DawI' SoH pa' rawalpindi, pakistan holder. ghaH american Welding nugh ((aws)) american nugh mechanical engineers usa 'ej member.