Consulting
FEA Analysis For Internal Gas Distributors
Introduction This study detailed the mechanical calculations for four internal components designed as gas inlet distributors within a pressure vessel. These internals were welded to
17 May 2024
Introduction This study detailed the mechanical calculations for four internal components designed as gas inlet distributors within a pressure vessel. These internals were welded to
Introduction In the past, visible vibrations were observed in the piping connected to hydrogen compressors. These vibrations were particularly noticeable in the small-bore pipes branching
Introduction In this case study, a burst test was conducted to demonstrate the strength of a DN1200 Glass Fiber Reinforced Plastic (GRP) pipe. The objective
Introduction In the context of a compression station project, DRG conducted a comprehensive static stress analysis encompassing the plant inlet, slug catcher, and filter areas.
Introduction In this case study, we delve into a static stress analysis concerning a distillate water header within a remineralization unit of a desalination plant.
Introduction In the analysis conducted for the gas-inlet top box of a heat exchanger, which forms a part of the Torrefaction Tower, emphasis was placed
Introduction In the context of a greenfield project centered on the construction of a power plant, fiberglass-reinforced plastic (GRP) pipes with diameters of approximately 2.5
Since its beginnings, in 1989, Dynaflow Research Group (DRG) has been involved in shaping the landscape of fiberglass engineering through research, design engineering, and consultancy.
Introduction In this case, slender steel conical towers are designated to support high-tension wires, subjecting them to various horizontal and vertical load components. The load
Introduction In the examination of our client’s initiative to assess and enhance the primary cooling water system within an established power plant, various configurations, and
Date: April 2nd, 2024 We are delighted to announce the celebration of Dynaflow Research Group’s 35th anniversary, marking a significant milestone in our journey of
Introduction The seawater system was classified as a class A system per the Service Limit State (SLS) standards. Constructed from reinforced fiberglass piping, it comprised
Introduction In this case study, the focus was on conducting a stress analysis of the GRE piping system utilized to link the pumps to the
Introduction As a result of a failure in a fiberglass header in the undercroft of a chilled water system, the decision was made to replace
Introduction In this case study, we delved into the stress analysis findings regarding the revised flue gas overhead line in Singapore connecting a third-stage separator
Introduction In the current project, a static stress analysis was conducted to assess the performance of GRE headers connected to filter vessels. The purpose was
Introduction In this case study, a finite element stress analysis was conducted on a seawater dump caisson installed on the deck of a floating offshore
Introduction A plant in Asia requested a simulation study to be performed, both fluid mechanical (acoustical) and mechanical, of the compressor piping between the first
Introduction A serious crack next to a weld in the circulating water flow system was found but it was unclear what had caused this crack.
Dynaflow Research Group is pleased to announce the new major releases of all of the DRG software products, including BOSfluids, BOSpulse, ISOtracer, and BOSview. Version 7.1.
Dynaflow Research Group will be one of the exhibitors at TPS Turbomachinery & Pump Symposia (TPS) in Houston, Texas. TPS is a vital industry event,
Hydrogen is considered to be a key element in the energy transition. This molecule is the most notable option for the decarbonisation of hard-to-abate sectors
As part of our responsibilities at DRG, we conduct both standard pressure drop calculations and surge/slug analyses for firewater systems. Our involvement spans various stages,
Geothermal energy is a promising renewable energy source, but it comes with its own set of challenges. Two significant issues in geothermal well operations are
Flow-induced vibrations in piping systems are a critical aspect of mechanical engineering, impacting the reliability and integrity of various industrial setups. The Japan Society of
Introduction In the field of engineering design, the precision of pipe flexibility analysis models is critically important for accurately assessing nozzle loads in steel piping
In 2013, a major incident occurred in a Louisiana chemical plant. In a nonroutine operation, plant operators attempted to start a heat exchanger which had
To understand pressure surges in large piping systems, a good place to start is at home. When you finish washing your hands, turning off the
Brief introduction to piping vibrations Vibrations are an oscillatory motion about an equilibrium. The oscillatory movement causes alternating stresses in the system, which, if excessive
The pulsation challenge of a variable speed reciprocating compressorA pulsation analysis according to the API 618 is a good method of preventing excessive vibrations in
ON-DEMAND 🕖 30 MIN 🌏︎ ENGLISH Understanding and Mitigating AIV and FIV in Modern Plant Design David Tickner Senior Engineer Get instant access
ON-DEMAND 🕖 30 MIN 🌏︎ ENGLISH How To Predict Stresses From Slug Flows Daniëlle de Jong Senior Engineer Get instant access Free recording
ON-DEMAND 🕖 60 MIN 🌏︎ ENGLISH Building models using the import PCF file feature & model verification In BOSfluids Thijs Krijger Project Engineer
ON-DEMAND 🕖 60 MIN 🌏︎ ENGLISH Solving Vibrations In A Two-Phase Process Line Frank Bos Partner Get instant access Free. Recording + slide
ON-DEMAND 🕖 50 MIN 🌏︎ ENGLISH Surge and dynamic stress analysis for an offshore wind farm using BOSfluids Mark Groen Software Lead Engineer
ON-DEMAND 🕖 25 MIN 🌏︎ ESPAÑOL Integración de BOSfluids con Caesar II y otros programas de tensión de tuberías Uri Peker Engineer Get instant
ON-DEMAND 🕖 35 MIN 🌏︎ ENGLISH BOSfluids integration with CAESAR II and other pipe stress programs Ryan Metcalf Manager USA Get instant access
Dynaflow ran a finite element analysis to ASME VIII Division 2 of a stainless steel SA240 316L support ring welded into a carbon steel Claus reactor. All primary stresses were within the allowable. At the head-to-ring connection, however, secondary stress reached 885 MPa (259 percent of the allowable), and fatigue
Two identical condensers cool sulphur gas to a temperature close to its dew point. The gas passes through 363 SA-179 tubes of 38.1 mm outside diameter and 8840 mm straight length, set on a 48 mm triangular pitch between two stationary tube sheets. On the shell side, water maintains a
New water hydrants were installed as part of an upgrade of the firewater system at a main degassing station. Each hydrant valve joins the steel hydrant part to the underground glass-reinforced epoxy (GRE) piping, and the GRE piping connects to steel piping coming from the above-ground equipment. The GRE is
Firing of three relief valves on a steam line operating at 225 °C and 9.5 barg was analysed in CAESAR II, with dynamic loads generated in BOSfluids. The spectrum analysis gave a combined dynamic and static stress of 128% of the occasional allowable stress and the time-history analysis including the
Condensation and Steam Hammer in a Cold Steam Line The analyses assumed steam at 380°C and 40 Barg entering a 36-inch high-pressure steam line with a pipe temperature of +5°C. Potential problems are anticipated at start-up because the steam condenses on entering the cold pipe. Steam remaining in the line
A BOSfluids surge analysis and slug impact calculation of a 12-inch steam start-up line gave maximum unbalanced forces of 1.32 kN, 1.3 kN and 3.2 kN for three surge scenarios, and 16.5 kN and 23 kN for 7 m and 10 m slug impacts on the pressure control valve. CAESAR
During re-alignment of the suction and discharge piping for sales gas compressors K2002A and K2002B, ready for connection to the compressor nozzles, the discharge line of K2002B could not be correctly aligned. The displacement at constant load hanger 04-SS-1017 (PS 1017) took the hanger out of its operating range. A
A CAESAR II stress analysis of a revised high-pressure blowdown line operating at 20.6 barg and 160 °C found that the system as proposed did not meet ASME B31.3 because of large thermal displacements of the DN600 header. If guide support S1 is replaced by a restraint in the z-direction
At a refinery, instrument air is supplied by three Atlas Copco compressors. Two are motor driven; the third is driven by a Coppus RHLA-24 steam turbine commissioned in 2008. Two months after start-up, a plain bearing malfunctioned. The turbine was overhauled and reassembled at site in August 2009, after which
Weld 34 Crack and Dead-End Configuration The circulation system has two pumps, one operating and one spare. The operating pump feeds cooling water back into the Benson vessel at the top of the system. In the situation analysed, one pump had been taken out for revision. A blind valve was
Branch Failures in a Buried GRP Firewater Ring The firewater system is made from glass-reinforced plastic (GRP) pipe and is mainly underground. The main is a ring with large-bore branch connections, and smaller-bore branch connections feed the hydrants and monitors above ground. In early operation the system suffered a number
Slug Flow Operation and Two Elbow Fatigue Failures At a gas-to-liquids facility, the water feed line to an HCN/NH3 stripper (1C-1201) regularly operated in the slug flow regime. Slugs can generate large dynamic loads on the piping, which can eventually result in fatigue failures. Two leakage incidents occurred, each caused
Flange Leakage in 44-Inch Catalytic Oxidiser Piping The 44-inch top and bottom nozzles of a catalytic oxidiser are connected to the shell and tube sides of a recuperative heater by 44-inch piping. The hot design temperature is 527 °C. The required piping flexibility is provided by a number of expansion
Steam-Out Cycles of the Carbon Bed Vessels In the offgas cleaning system of an EBHP reaction section, vessels V105A to V105D absorb EB from the offgas on active carbon beds, because the EB has to be removed before flaring for environmental reasons. Once a bed is saturated, it is steamed
A Branch Failure on a Methanol Plant Steam Header A methanol plant operating on a 3,000 tonnes per day basis suffered a piping failure on 19 May 2012. A ¾ inch branch broke off the medium-pressure (MP) steam header when the turbine driving the synthesis gas compressor tripped. In normal
A pulsation analysis to API 618 Design Approach 1 checked the proposed dampener bottles of onshore and offshore reciprocating compressors against a guideline of 70 percent of the allowable pulsation levels. All proposed bottles gave levels within the API 618 allowable. At the line connection nozzle, only the offshore discharge
Condensate Forwarding Duty at a Nigerian Gas Plant At a gas plant in Nigeria, four reciprocating pumps on an N+1 philosophy (three running, one spare) forward condensate from a storage and separation tank into a gas pipeline. A 12-inch suction header carries the condensate from the tank to the pumps,
Severe Vibration in Vaporiser Feed Pump Piping The suction and discharge piping connected to the quadruplex methanol vaporiser feed pumps was suffering from severe vibration. A pulsation analysis combined with a mechanical response analysis of the as-built piping was performed to establish the root cause. The analyses determined the stress
At the Utorogu Flow Station in Nigeria, vibration was observed in the suction header, the discharge header and the pump recirculation line. Dynaflow Research Group performed pulsation, mechanical response and static stress analyses to find the root cause, identify any other possible problems and recommend improvements. The station pumps crude
A third-party review of the HP discharge line at a gas compression station found that the designer’s stress report shows the discharge nozzle conforming to the vendor’s allowable values with the springs pinned, as API 686 requires. At the 7th April alignment check the flange separation exceeded the 4.5mm vendor
A new natural gas booster plant at Winksele, Belgium, was undergoing Site Approval Tests (SAT) after the end of construction. The SAT scope included a pipe vibration level assessment to verify that all vibration levels were within acceptable limits. This case study describes the measurement campaign and the VDI 3842
DYNAFLOW RESEARCH GROUP (“DRG”) Enters into Reseller Agreement with Quality Professional Software (“QPS”) RIJSWIJK, The Netherlands – January 24, 2024 (Dynaflow Research Group BV) –
Dynaflow Research Group and Seawind Ocean Technology announce collaboration focusing on technical readiness of floating offshore wind applications in the Mediterranean Sea. This landmark partnership