Elastic plastic assessment of selected nozzle connections to shell in Gas Mercury Removal Unit (MRU) Bed Vessels PGCA-VA-2510 A/B and PGCA-VA-3110 A/B

The Gas Mercury Removal Unit (MRU) Bed Vessel bearing equipment numbers PGCA-VA-2510 A/B and PGCA-VA-3110 A/B are to be delivered to Mubadala Petroleum, as part of the EPCIC for Pegaga Development Project. The equipment will be installed in Integrated Central Processing Platform (CPP) in Block SK320, offshore Sarawak, Malaysia. High local stress may occur in the selected nozzle interface with shell, due to geometry discontinuity in selected nozzles, contributed by the angular position of nozzles and the small gap between some nozzles. Initial structural analyses have concluded that the local stresses in the assessed nozzle interface location having higher stress levels than the allowable limit. Hence, an alternative approach of designing these nozzle interfaces is carried out using elastic-plastic analysis method, as outlined in Section 5.2.4 of ASME BPVC Sec. VIII, Div. 2, where FEA engineering is performed using inelastic material model, i.e. inclusion of plasticity effect accounting true stress and true strain, is included in the non-linear static analysis.

Evaluation of maximum internal rupture pressure on Regenerative Thermal Oxidizer (RTO)

The performed work is part of steel fabrication engineering and installation of new Regenerative Thermal Oxidizer (RTO) unit 98.000 3K. It is designed and developed by WK Asia-Pacific Environment Pte Ltd in Singapore. Vekthor’s scope of work as a specialist Finite Element Analysis (FEA) company, provided the strength assessment of the new RTO equipment due to maximum internal rupture pressure. Limit state FEA engineering analysis was carried out on the RTO equipment main structural components material at breaking point, i.e. at ultimate tensile strength.

FEA engineering analysis for modified tubesheet inlet cooler equipment PGCA-HT-2030 A/B and PGCA-HT-2035 A/B

Inlet coolers bearing equipment number PGCA-HT-2030 A/B and 2035 A/B are to be delivered to Mubadala Petroleum, as part of the EPCIC For Pegaga Development Project. The equipment will be installed in Central Processing Platform (CPP) in Block SK320, offshore Sarawak, Malaysia. A change of design took place during the design process of the equipment. It is mainly driven by a tube rupture surge pressure, observed from a recently made tube rupture study. This concluded that a thicker shell barrel is required, i.e. from 14 mm to 22 mm. The shell barrel is welded to tubesheet at both ends. Originally, there is a hub protrusion from the tubesheets, having same thickness as the shell for welding/interface purpose. However, with the present change of thickness of the shell barrel, the existing hub on the tubesheets cannot be used and removed from the tubesheets. Finite element analysis (FEA) engineering is required on the fixed shell barrel connection, incorporating the new weld profile in the computer model. In addition, the tube to tubesheet interface and the tubesheet itself are also required to be assessed. Both design condition and hyro-testing conditions are assessed.

FEA engineering analysis of chimney tray in new LP-Flash / Stripper equipment T-1302

The new LP-Flash / Stripper column bearing equipment number T-1302 is to be delivered to BASF Petronas Chemicals Sdn Bhd, as part of the SYNGAS Kuantan Project. The final installation of the equipment is in BASF Petronas Chemicals Sdn Bhd facility in Gebeng, Pahang, Malaysia. Among others, one of the internal components of equipment T-1302 is the chimney tray component, welded internally on to the column shell. The chimney tray component is evaluated using Finite Element Analysis (FEA) engineering with appropriate stress classifications against acceptance criteria based on ASME BPVC. Vekthor, as the specialist FEA company, provided consultancy and facilitated Professional Engineer (PE) endorsement for the chimney tray component.

Transient fatigue damage assessment of air dryer vessel 84-U005-C01 and 84-U005-C02

Part of the pressure vessel engineering for equipment 84-U005-C01 and 84-U005-C02 requires assessment of transient fatigue damages and thermal ratcheting of the weld connections using Finite Element Analysis (FEA) engineering. The pressure vessel design is part of twin components that are to be delivered to Ingersoll Rand Malaysia Co. Sdn Bhd, as part of the BEPCC For Third Boiler Project at ASEAN Bintulu Fertilizer, for Owner ASEAN Bintulu Fertilizer Sdn Bhd. The final installation location of equipment 84-U005-C01 and 84-U005-C02 is in ASEAN Bintulu Fertilizer Sdn Bhd. facility in Bintulu, Sarawak, Malaysia. The equipment works in pair, having three operating cycles each per day of switching operation from Drying Mode to Regeneration Mode, and vice-versa. Each equipment works on switching basis in order to have provide continuous dry compressed air for a design lifespan of 25 years.

Fatigue damage assessment of Memguard Adsorption Vessels V-2211 A/B/C/D/E

Pressure vessel engineering for the memguard adsorption vessel bearing equipment number V-2211 A/B/C/D/E is to be delivered to Honeywell UOP, as part of the Provision of Engineering, Procurement, Construction, Installation & Commissioning (EPCIC) for Kasawari Gas Development Project, for Owner Petronas Carigali Sdn Bhd, requires assessment of fatigue damages and thermal ratcheting on critical hotspots using Finite Element Analysis (FEA) engineering. The overall service life of the equipment is 25 years with varying load cycles involves thermal expansion and internal pressure. The final installation location of equipment V-2211 A/B/C/D/E is in Petronas Carigali’s Central Processing Platform facility in Kasawari Gas Field in South China Sea, approximately 200 km offshore from Sarawak, Malaysia. The work is carried out for Customer, Jutasama Sdn Bhd, responsible for the overall pressure vessel design and fabrication.

FEA engineering for fatigue damage assessment of reactor tank R-30301

The reactor tank bearing equipment number R-30301, trough general pressure vessel engineering is to be delivered to the owner PT Unilever Oleochemical Indonesia, as part of the Marvel One Project. The final installation location of equipment R-30301 is in PT Unilever Oleochemical Indonesia Plant facility in Indonesia. Vekthor on its capacity as the specialist FEA company carried out all fatigue damage assessment on this equipment using Finite Element Analysis (FEA) engineering, on critical identified hotspots, due to its operating and discharging loading histories.

Pressure vessel engineering due to out of roundness assessment shell courses in Amine Absorber 102-30A-C-0201

Pressure vessel fabrication of the amine absorber column bearing equipment number 102-30A-C-0201 is to be delivered to Honeywell UOP, as part of the Calcasieu Pass LNG Export Terminal Project. The final installation location of equipment 102-30A -C-0201 is in the town of Cameron Parish, Lousiana, United States. During final dimension control and visual inspection before the shop hydro testing is carried out, it is observed that four shell courses have exceeded the out of roundness tolerance. Due to risk of as-deformed shell courses raising the stress levels higher, Finite Element Analysis (FEA) engineering analysis assessment is carried out to assess the actual stress variation due to the deformed configuration of the shell courses, as compared to perfectly undeformed shell courses. The analysis is carried out using elastic-plastic analysis method, as outlined in Section 5.2.4 of ASME BPVC Sec. VIII, Div. 2, where FEA engineering is performed using inelastic material model, i.e. inclusion of plasticity effect accounting true stress and true strain, is included in the non-linear static analysis.

FEA engineering of local stress analysis on selected nozzles in Gas Mercury Adsorbent Vessels V-2301A and V-2301B

As part of the pressure vessel engineering, the Gas Mercury Adsorbent Vessels V-2301A and V-2301B are to be delivered to MMHE Sdn Bhd, as part of the Provision of Engineering, Procurement, Construction, Installation & Commissioning (EPCIC) for Kasawari Gas Development Project, for Owner Petronas Carigali Sdn Bhd. The work involves part of the pressure vessel design whereby Vekthor, on its capacity as the specialist FEA company provided the thermal and strength assessment of selected nozzle interface/junction to top and bottom head assembly in these vessels, during design condition. The final installation location of equipment V-2301A/B is in Petronas Carigali’s Central Processing Platform facility in Kasawari Gas Field in South China Sea, approximately 200 km offshore from Sarawak, Malaysia.

Blast load analysis on safe habitat

Safe habitat consist of portal frame structure and blast panel walls are subjected to military grade explosions. The structure is intended to safely house several people during controlled explosion works carried out in its nearby vicinity. Multiple blast sources in different locations are defined to investigate the response of the structure against the blast pressure. The work is part of an industrial research work that covers both simulation-based analysis and physical testing and correlation between the two, using special strain gauges attached in specific locations on the structure. The work is carried out for an undisclosed customer in northen Europe

Redundancy analysis for Donghea 1 offshore jacket structure

The Donghea 1 offshore jacket structure has been operating since 2004 in the Donghea 1 natural gas field, supporting a production facility in the East Sea, offshore of Ulsan, Korea. The production of natural gas has been on going until the year 2019. The jacket structure is assessed for possibility to replace the existing topsides with a wind turbine sub-station facility. One of the many assessments that are carried out for the jacket structure is the redundancy analysis. Here, the reserve strength ratio (RSR) for undamaged structure is compared with various damaged structures based on different scenarios, when subjected to environmental loading. The work is carried out for Ramboll A/S of Denmark on behalf of Equinor ASA of Norway.

Exhaust stack for offshore processing facility

Tapis Enhanced Oil Recovery (EOR) and Rejuvenation Project involves integrating utilities within the Tapis Field Central Processing Platform, to reduce retrofitting and modification to the aging Tapis satellite platforms, located in east coast offshore of peninsular Malaysia.

The Tapis facility is operated by ExxonMobil Exploration and Production Malaysia Inc. The works carried out are structural and thermal analysis of five turbine exhaust stacks. In addition to global analyses of the exhaust stacks, several supplementary analyses were also carried out, lifting analysis, natural frequency analysis, vortex shedding analysis and local nozzle interface analysis.

Fatigue analysis on dehydration adsorber

The Calcasieu Pass LNG Export Terminal Project involves development of export facility will be built on a 930-acre site in Cameron Parish, towards the southern edge of the city of Lake Charles in Louisiana, on the intersection between the Calcasieu Ship Channel and the Gulf of Mexico. Several dehydration adsorber equipment are part of the new facility in the new LNG terminal. These equipment are designed for cyclic fatigue loading for a total operating service life of 30 years. The selected critical hotspots are located in regions of geometrical discontinuities of the equipment, both inside and outside. The work is carried out for Honeywell UOP.

Thermal gradient assessment on circular girth weld

Five different equipment subjected to cold cryogenic services are to be delivered to JGC Flour BC LNG Joint Venture, as part of the LNG Canada Project for LNG Canada. In all the equipment, the support skirt consists of two different material construction, stainless steel on the upper section towards the bottom head and carbon steel towards the bottom of the support skirt. The materials are welded together by a circumferential weld line in a specific location. In the location of this weld line, the dissipated design temperature, shall be similar to the ambient temperature of the equipment surrounding, which is -25 deg. C. It should be noted that the design temperature originating from the inside of the equipment are much lower in the range of – 130 deg. C and – 90 deg. C. The final installation location of the five equipment is in LNG Canada Plant in Kitimat, British Columbia, Canada.

Fatigue analysis on molecular sieve dryer filter

The PUSRI IIB Project for 2000 MTPD Ammonia Plant and 2750 MTPD Urea Plant intends to produce 2,000 tons per day of ammonia and 2,750 tons per day of urea in new facility development in Palembang, South Sumatra, Indonesia. The new facility is owned and will be operated by PT Pupuk Sriwidjaya Palembang. Two units of molecular sieve dryer filters subjected to cyclic loading are analysed and designed for a total operating service life of 20 years. The fatigue lives for critical hotspots are determined throughout the equipment. The work was carried out as a fast track project mainly due to the urgency of the overall project completion.

Refracted boundary parts exposed to extreme heating

One unit of superclaus reactor equipment and two units of first and second converters are designed and delivered to Technicas Reunidas SA, as part of the Chemical and Refining Integrated Singapore Project (CRISP) for ExxonMobil Asia Pacific Pte. Ltd. The equipments are fitted with internal refractory lining and external insulation layer. The internal refractory lining is intended to enclose and protect all internal metal surfaces from extreme heating. However, some of the metal parts would be exposed to extreme heating through the refractory lining. These locations are referred to as refracted boundary parts. The refracted boundary parts are analysed to withstand the high design temperature and pressure. The final installation location of the equipment are in ExxonMobil Singapore Chemical Plant facility in Jurong Island, Singapore.

Degree of Bending (DOB) input for RBI sensitivity study on South Arne lattice tower

As part of the on-going work on the South Arne platform, which include updates of the fatigue and Risk Based Inspection (RBI) analyses, it is judged relevant to revisit a number of the basic variables forming basis for the RBI analyses. The degree of bending (DOB), being one of the variables, is used as an input to the RBI analysis, that determines the inspection programme (frequency of inspection of details with relative low fatigue performance). The DOB values for two different tubular joints with high frequency of inspections is determined. Four locations in the brace footprint are used as the location of sample the stress, i.e. crown and saddle positions, with three load cases used per brace footprint, i.e. axial force, out-of-plane (OP) moment and in-plane (IP) moment. The work is carried out for Ramboll A/S on behalf of Hess Denmark ApS.

Ship Collision and Deterministic Fatigue Analyses in New Fender in Tyra West B

Ship collision analyses and deterministic fatigue analyses are carried out for the new fender in Tyra West B platform in Tyra Field, located in the Danish sector of the North Sea. This is part of the Tyra Future Development Project. Three different ship collision analyses are carried out namely for operating, accidental and post damage conditions. For the fatigue analyses, deterministic fatigue analysis is performed with the aim to confirm that the design of the new fender and attachments to the existing MSF legs have sufficient fatigue strength. The work is carried out for Ramboll A/S on behalf of Total E&P Danmark A/S.

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FEA engineering analysis for modified tubesheet inlet cooler equipment PGCA-HT-2030 A/B and PGCA-HT-2035 A/B

Evaluation of maximum internal rupture pressure on Regenerative Thermal Oxidizer (RTO)

Elastic plastic assessment of Gas Mercury Removal Unit (MRU) Bed Vessels PGCA-VA-2510 A/B & PGCA-VA-3110 A/B

Fatigue damage assessment of Memguard Adsorption Vessels V-2211 A/B/C/D/E

Transient fatigue damage assessment of air dryer vessel 84-U005-C01 and 84-U005-C02

FEA engineering analysis of chimney tray in new LP-Flash / Stripper equipment T-1302

FEA engineering for fatigue damage assessment of reactor tank R-30301

FEA engineering of local stress analysis on selected nozzles in Gas Mercury Adsorbent Vessels V-2301A and V-2301B

Pressure vessel engineering due to out of roundness assessment shell courses in Amine Absorber 102-30A-C-0201

Redundancy analysis for Donghea 1 offshore jacket structure

Degree of Bending (DOB) input for RBI sensitivity study on South Arne lattice tower

Ship Collision and Deterministic Fatigue Analyses in New Fender in Tyra West B

Fatigue analysis on dehydration adsorber

Blast load analysis on safe habitat

Exhaust stack for offshore processing facility

Thermal gradient assessment on circular girth weld

Refracted boundary parts exposed to extreme heating

Refracted boundary parts exposed to extreme heating