Hydrocarbon Processing - May 2021 - 31

Maintenance and Reliability
The crack then propagated through the
weld metal of Weld 1 toward the inner
surface of the shell.
In FIG. 5, a second weld can be seen between the reinforcement pad and the nozzle. There is also a gouge in the shell. Material has been removed from this location
and a small quantity deposited adjacent to
the gouge. Both this gouge and another
parallel gouge can be seen in FIG. 2 running
across the entire width of the material.
A microscopical examination of this
section revealed that all three parent materials were ferrite-pearlite microstructure. Weld 1 had been carried out from
the inside of the shell (FIG. 6A). It appears
that an initial tack weld was performed
to attach the reinforcement pad, and that
the cap was ground flush to the inside of
the shell. This weld has HAZ regions on
all three parent materials. The crack has
propagated through the main part of the
weld. FIG. 6B shows detail of the crack and
microstructure at the mouth of the crack.
Weld 2 is between the nozzle and the
reinforcement pad (FIG. 7A). There is a
feature that is likely to be lack of fusion

associated with the root pass on the reinforcement pad side of the weld (FIG. 7B).
Hardness results for Weld 1 found a
peak hardness of 258 HV5, which was associated with the HAZ of the tack weld
on the reinforcement pad parent material. Peak hardness in the HAZ associated
with the nozzle and shell parent materials
were 179 and 206 HV5, respectively. The
peak weld metal hardness measured 202
HV5 in the tack weld, 207 HV5 in the
subsequent root pass, and 194 HV5 in the
cap. The hardness results for Weld 1 are
detailed in TABLE 1.
The peak hardness associated with
Weld 2 was 280 HV5 in the HAZ adjacent
to the cap in the reinforcement pad parent material. The HAZ associated with
the root pass of this weld had a peak hardness of 232 HV5 in the reinforcement
pad parent material. The HAZ associated
with the nozzle parent material had a lower peak hardness of 203 HV5. The peak
hardness measured in the weld metal was
225 HV5 in the cap and 202 HV5 near to
the root. The hardness results for Weld 2
are detailed in TABLE 2.

FIG. 7. (A) Overview of Weld 2, which
was located between the nozzle and the
reinforcement pad; and (B) detail of the
lack of fusion at the reinforcement pad side
of the weld.

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Hydrocarbon Processing | MAY 2021

31


http://www.cw-estgroup.com/hp

Hydrocarbon Processing - May 2021

Table of Contents for the Digital Edition of Hydrocarbon Processing - May 2021

Contents
Hydrocarbon Processing - May 2021 - Intro
Hydrocarbon Processing - May 2021 - Cover1
Hydrocarbon Processing - May 2021 - Cover2
Hydrocarbon Processing - May 2021 - Contents
Hydrocarbon Processing - May 2021 - 4
Hydrocarbon Processing - May 2021 - 5
Hydrocarbon Processing - May 2021 - 6
Hydrocarbon Processing - May 2021 - 7
Hydrocarbon Processing - May 2021 - 8
Hydrocarbon Processing - May 2021 - 9
Hydrocarbon Processing - May 2021 - 10
Hydrocarbon Processing - May 2021 - 11
Hydrocarbon Processing - May 2021 - 12
Hydrocarbon Processing - May 2021 - 13
Hydrocarbon Processing - May 2021 - 14
Hydrocarbon Processing - May 2021 - 15
Hydrocarbon Processing - May 2021 - 16
Hydrocarbon Processing - May 2021 - 17
Hydrocarbon Processing - May 2021 - 18
Hydrocarbon Processing - May 2021 - 19
Hydrocarbon Processing - May 2021 - 20
Hydrocarbon Processing - May 2021 - 21
Hydrocarbon Processing - May 2021 - 22
Hydrocarbon Processing - May 2021 - 23
Hydrocarbon Processing - May 2021 - 24
Hydrocarbon Processing - May 2021 - 25
Hydrocarbon Processing - May 2021 - 26
Hydrocarbon Processing - May 2021 - 27
Hydrocarbon Processing - May 2021 - 28
Hydrocarbon Processing - May 2021 - 29
Hydrocarbon Processing - May 2021 - 30
Hydrocarbon Processing - May 2021 - 31
Hydrocarbon Processing - May 2021 - 32
Hydrocarbon Processing - May 2021 - 33
Hydrocarbon Processing - May 2021 - 34
Hydrocarbon Processing - May 2021 - 35
Hydrocarbon Processing - May 2021 - 36
Hydrocarbon Processing - May 2021 - 37
Hydrocarbon Processing - May 2021 - 38
Hydrocarbon Processing - May 2021 - 39
Hydrocarbon Processing - May 2021 - 40
Hydrocarbon Processing - May 2021 - 41
Hydrocarbon Processing - May 2021 - 42
Hydrocarbon Processing - May 2021 - 43
Hydrocarbon Processing - May 2021 - 44
Hydrocarbon Processing - May 2021 - 45
Hydrocarbon Processing - May 2021 - 46
Hydrocarbon Processing - May 2021 - 47
Hydrocarbon Processing - May 2021 - 48
Hydrocarbon Processing - May 2021 - 49
Hydrocarbon Processing - May 2021 - 50
Hydrocarbon Processing - May 2021 - 51
Hydrocarbon Processing - May 2021 - 52
Hydrocarbon Processing - May 2021 - 53
Hydrocarbon Processing - May 2021 - 54
Hydrocarbon Processing - May 2021 - 55
Hydrocarbon Processing - May 2021 - 56
Hydrocarbon Processing - May 2021 - 57
Hydrocarbon Processing - May 2021 - 58
Hydrocarbon Processing - May 2021 - 59
Hydrocarbon Processing - May 2021 - 60
Hydrocarbon Processing - May 2021 - 61
Hydrocarbon Processing - May 2021 - 62
Hydrocarbon Processing - May 2021 - 63
Hydrocarbon Processing - May 2021 - 64
Hydrocarbon Processing - May 2021 - 65
Hydrocarbon Processing - May 2021 - 66
Hydrocarbon Processing - May 2021 - 67
Hydrocarbon Processing - May 2021 - 68
Hydrocarbon Processing - May 2021 - 69
Hydrocarbon Processing - May 2021 - 70
Hydrocarbon Processing - May 2021 - 71
Hydrocarbon Processing - May 2021 - 72
Hydrocarbon Processing - May 2021 - 73
Hydrocarbon Processing - May 2021 - 74
Hydrocarbon Processing - May 2021 - 75
Hydrocarbon Processing - May 2021 - 76
Hydrocarbon Processing - May 2021 - 77
Hydrocarbon Processing - May 2021 - 78
Hydrocarbon Processing - May 2021 - 79
Hydrocarbon Processing - May 2021 - 80
Hydrocarbon Processing - May 2021 - 81
Hydrocarbon Processing - May 2021 - 82
Hydrocarbon Processing - May 2021 - 83
Hydrocarbon Processing - May 2021 - 84
Hydrocarbon Processing - May 2021 - 85
Hydrocarbon Processing - May 2021 - 86
Hydrocarbon Processing - May 2021 - 87
Hydrocarbon Processing - May 2021 - 88
Hydrocarbon Processing - May 2021 - 89
Hydrocarbon Processing - May 2021 - 90
Hydrocarbon Processing - May 2021 - Cover3
Hydrocarbon Processing - May 2021 - Cover4
https://www.nxtbook.com/gulfenergyinfo/gulfpub/HPI-Market-Data-2023-v3
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https://www.nxtbook.com/nxtbooks/gulfpub/petrochemical_processes_handbook_2021_v2
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https://www.nxtbook.com/nxtbooks/gulfpub/hp_202101
https://www.nxtbook.com/nxtbooks/gulfpub/catalyst_handbook_2020_v2
https://www.nxtbook.com/nxtbooks/gulfpub/catalyst_handbook_2020
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202012
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202011
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202010
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2021
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202009
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202008
https://www.nxtbook.com/nxtbooks/gulfpub/refining_processes_handbook_2020
https://www.nxtbook.com/nxtbooks/gulfpub/refining_processes_handbook_2020_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202007
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202006
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202005
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202004
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202003
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202002
https://www.nxtbook.com/nxtbooks/gulfpub/hp_202001
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201912
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201911
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2020_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2020
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201910
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201909
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201908
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201907
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201906
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201905
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201904
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201903
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201902
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201901
https://www.nxtbook.com/nxtbooks/gulfpub/petrochemical_2018_v2
https://www.nxtbook.com/nxtbooks/gulfpub/petrochemical_2018
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201812
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2019_v2
https://www.nxtbook.com/nxtbooks/gulfpub/hpimarket_2019
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201811
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201810
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201809
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201808
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201807
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201806
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201805
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201804
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201803
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201802
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201801
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201712
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201711
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201710
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201709
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201708
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201707
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201706
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201705
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201704
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201703
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201702
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201701
https://www.nxtbook.com/nxtbooks/gulfpub/hp_2017mediaplanner
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201612
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201611
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201610
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201609
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201608
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201607
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https://www.nxtbook.com/nxtbooks/gulfpub/hp_2016mediaplanner
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201509
https://www.nxtbook.com/nxtbooks/gulfpub/hp_201508
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