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,
Table of Contents A Good GRP Code Covers a Large Variety of Products and Loading Conditions A robust Glass Reinforced Plastic (GRP) piping code must
Thermal bowing is a structural phenomenon that arises when a temperature gradient exists across the cross-section of a pipe or vessel. In typical pipe design,
Table of Contents As the demand for flexible, energy-efficient, and reliable compressor operation grows—particularly in hydrogen and process gas applications—our clients increasingly turn to stepless
Table of Contents Multiphase flow is a recurring challenge in process engineering, where multiple fluid phases—such as gases, liquids, or solids—interact within a single flow
In the chemical and energy industries, liquid products such as LNG, ammonia, or naphtha are commonly transferred between ships and onshore storage tanks. These transfers
In the engineering domain, accurately simulating transient events in pipeline systems is critical, particularly for essential safety mechanisms such as firewater systems. These systems, typically
Introduction Pressure vessels are critical components in a wide range of industries, including power generation, petrochemical processing, and industrial manufacturing. These vessels are designed to
When Theodor von Kármán first discovered vortex shedding in 1911, he likely had no idea how pivotal his work would become for modern engineering, particularly
In a previous article, we introduced the risks and design considerations of repurposing an existing natural gas compressor system for hydrogen. That discussion focused on
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
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
Compressor Suction Strainer and Its Fatigue Cracking The suction strainer of a centrifugal compressor developed fatigue cracks. The strainer is a perforated stainless steel truncated cone (Werkstoff 1.4571), 970 mm long, with an outside diameter of 160 mm at the upstream end and 420 mm at the downstream end. The
Operating Context and Damper Configuration Assumed At a plant in Qatar, a Dresser Roots compressor compresses seal gas in two stages. The client requested a simulation study, both acoustic and mechanical, of the compressor piping between the first-stage discharge and the second-stage suction. The second-stage bypass lines are included. The
Why Pulsation Risks Warranted Attention Before Operation The compression station was designed to increase and maintain operating pressure on a natural gas piping network, overcoming friction losses. It has four (3+1) two-stage centrifugal compressors with 19-blade impellers, running at a rated speed of 5750 RPM (95.8 Hz) within a range
A Commissioning Failure That Sent Debris Downstream During commissioning of a natural gas compressor station, pieces of fibreglass fabric, mineral wool and steel wire were found throughout the downstream system. A small amount of mineral wool was also found in the surge valve. Inspection showed that the mineral wool found
Compressor Piping Under Combined Marine and Process Loading The compressor module was located roughly halfway along the hull. Its connected piping had to accommodate thermal and pressure loads, wind loads, accelerations from wave-driven barge rocking and relative displacements from hull deformation. These loads could produce pipe deflection and bending and
Cyclic Thermal Duty in a Gas Treatment Air Cooler An air-cooled heat exchanger for a gas treatment plant is subjected to a varying inlet temperature. In the analysed winter case, which has the largest temperature variation, the fluid cycles between 7.5°C and 288°C during each 100-minute cycle. The first part
Consolidating Gas Flow onto a Single Metered Line A platform gas metering station has three parallel metering lines, two active and one spare. The modification replaces the orifice-type flow meter in the most eastern line with an ultrasonic (US) flow meter and directs the complete gas flow through that line.
Nitrogen Skid Stress Verification Requirement A manufacturer produces a nitrogen metering skid for a project. As a result of a client performance requirement, the existing design had to be verified by stress analysis. The skid is a straight pipe configuration with valves and flow meters, supported approximately 1000 mm above
An axisymmetric finite element analysis checked the flued flange expansion joint of a fixed-fixed tubesheet reboiler for low cycle fatigue, high cycle fatigue and primary stress to ASME Section VIII Division 2, at mean (26 mm) and minimum (22 mm) wall thickness. The largest low cycle fatigue stress range was
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