ANALYSIS OF TENSILE STRENGTH ANALYSIS OF TENSILE STRENGTH ON GIRTH WELD CLADDING MATERIAL ON GIRTH WELD CLADDING MATERIAL WITH VARIATION GROOVE SHAPE FOR OFFSHORE PIPELINE WITH VARIATION GROOVE SHAPE FOR OFFSHORE PIPELINE HERMAN PRATIKNO HERMAN PRATIKNO TEKNIK KELAUTAN TEKNIK KELAUTAN FTK – ITS FTK – ITS
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ANALYSIS OF TENSILE STRENGTH ANALYSIS OF TENSILE STRENGTH ON GIRTH WELD CLADDING MATERIALON GIRTH WELD CLADDING MATERIAL
WITH VARIATION GROOVE SHAPE FOR OFFSHORE PIPELINEWITH VARIATION GROOVE SHAPE FOR OFFSHORE PIPELINE
HERMAN PRATIKNOHERMAN PRATIKNO
TEKNIK KELAUTANTEKNIK KELAUTANFTK – ITSFTK – ITS
LATAR BELAKANGLATAR BELAKANG
TRANSPORTASI MINYAK DAN GAS
BAHAN-BAHAN BERSIFAT KOROSIF
PIPA CLADDING STAINLESS STEEL 316L
PENYAMBUNGAN PIPA DENGAN GIRTH WELD
PENGEBORAN MINYAK LEPAS PANTAI (OFFSHORE)
TUJUAN PENELITIANTUJUAN PENELITIAN
Untuk mengetahui pengaruh variasi dua bentuk groove pada pengelasan girth weld material cladding pipa offshore terhadap sifat mekanisnya, terutama sifat kekuatan tariknya.
GIRTH WELD (BACKING STEEL) LOCATION OF FAILURE : REPORT
ASME SECT IX, QW-163R = 2 x T, BEND ANGLE 180 oCTHE SPECIMENS SHALL NOT SHOW ANY OPEN DEFECTS EXCEEEDING 1.6 MM IN LENGTH AND DISBONDING.R = 1.5 x T, BEND ANGLE : 150o
ROOT BEND - V10 x 10 MM FULL SIZEABSORBED ENERGYMIN.AVE.45 JOULES SINGLE MIN.34 JOULESSHEAR AREA : MIN.50%
HARDNESS SURVEY SHALL BE DONE USING MC1 TEST SPECIMEN.BS : 248 Hv10 MAXCA : 325 Hv10 MAXAFTER HARDNESS TEST, MACRO GRAPHIC EXAMINATION SHALL BE PERFORMED (SEE NOTE 1)MAGNIFICATION OF PHOTO : x1
T-JOINTED PORTION - V
Ni 38.0, Cr 19.5, Mo 2.5.
WELD DEPOSIT (WELD CENTER) - V Ni, Cr & Mo SHALL BE REPORTED
NICK BREAK TESTTRANS TO THE
GIRTH WELD - V ROOM TEMP API STANDARD.1104 PARA 2.6.3TEST SOLUTION : ASTM G48 METHOD A (6% FeCl3 )DURATION TIME : 72 HRS.TP SIZE : 25 x 50 MMCORROSION RATE : 5 MPY MAX
TEST SOLUTION : ASTM A262 PRACTICE B (50% H2 SO 4
25GRAM FE2 (SO4) 4)DURATION TIME : 120 HRS.TP SIZE : 25 x 25 MMACCEPTANCE : NO CRACK SHALL BE OBSERVED BY VISIBLE AT x 100 MAGNIFICATION.EACH CORROSION RATE SHALL BE REPORTED FOR REFERENCE ONLY.
PENGAMATAN METALOGRAFI PENGAMATAN METALOGRAFI CLADDINGCLADDING GROOVE V GROOVE V
100 μ m
100 μ m
100 μ m
GAMBAR 1A GAMBAR 1B GAMBAR 1C
GAMBAR 1D GAMBAR 1E
100 μ m
100 μ m
316L
A516
316L
A516
E 316L
E 316LE 7018
E 316L
E 7018
E 316L
PENGAMATAN METALOGRAFI PENGAMATAN METALOGRAFI CLADDING CLADDING GROOVE Vm (MODIFIKASI)GROOVE Vm (MODIFIKASI)
100 μ m
GAMBAR 2A GAMBAR 2CGAMBAR 2B
GAMBAR 2D GAMBAR 2E
100 μ m
100 μ m
100 μ m
100 μ m
A516
316L
A516
316L
E 316L
E 316LA516
E 316L
E 7018
E 316L
KESIMPULANKESIMPULANPada pengelasan girth weld untuk pipa cladding 316L, bentuk sambungan las groove V mempunyai kekuatan tarik 3% lebih tinggi daripada groove Vm (modifikasi).
Pada pengelasan girth weld bentuk groove V mengalami defleksi sebesar 5o, lebih rendah dibandingkan bentuk groove Vm yang mengalami defleksi sebesar 10o.