News & Insights from Dynaflow Research Group

Fluid Flow

Hades used in PhD Huan He

Titel: Computational Modelling of Particle Packing in Concrete By Huan He Physical particle packing is becoming a hot topic in concrete technology as more and

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Dynaflow Research Group

Hades used with Porosity of Concrete

Titel: Porosity of Concrete – Morphological Study of Model Concrete By Jing Hu Porosity of Concrete has developed a comprehensive methodological framework for characterizing geometrical

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Fluid Flow

Hades used in PhD Jianjun Zheng

Titel: Mesostructure of concrete Stereological analysis and some mechanical implications By Jianjun Zheng On the mesoscale, concrete can be considered as a composite material consisting

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Maximum operating temperature in the cooler system model: 85°C (purple) and 45°C (pink).

Static Stress Analysis for Gas Air Cooler Systems

The station model of the Winksele Compressor Station, to be built in Belgium, was divided into two models with some mutual overlap, a compressor model and a filter model, each covered by a separate stress report. A third report covers the gas air coolers as model C, an add-on to

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CAESAR II model plot of a GRE pipe run coloured by wall thickness in mm. The pipe shown is the 2.4 mm section.

Static Stress Analysis of an Underground GRE Firewater System

Seventeen underground GRE firewater subsystems at a degassing station were analysed in CAESAR II for three load cases, hydrotest, operational and sustained, to ISO 14692. It may be concluded that, upon implementation of the recommendations, the static pipe stresses are acceptable and the flange loads are moderate. Underground GRE Firewater

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CAESAR II model plot of one buried GRE subsystem showing applied wall thickness by colour.

Static Stress Analysis of a Buried GRE Firewater System Upgrade

Thirteen buried GRE firewater subsystems were modelled in CAESAR II and assessed to ISO 14692 for hydrotest, operating and sustained load cases. On implementation of the recommendations, static pipe stresses are acceptable and flange loads are moderate. The buried glass-reinforced epoxy (GRE) piping in the firewater system upgrade at a

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Model view of the re-routed pumping station loops and platform piping, with supports shown as arrows.

GRE Firewater Line on a Jetty with Moving Trestles

The main firewater line for a new oil terminal jetty is made from glass reinforced epoxy (GRE) pipe. It starts at the onshore transition between underground and above-ground pipe, where it connects to steel lines, and follows a jetty about 1.5 km long. A firefighting platform about one third of

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Static analysis model of one buried GRE system. New piping is shown in pink and existing piping, included as continuation piping, in purple.

Stress Analysis of an Underground GRE Firewater Extension

Nine underground GRE firewater systems, 77 stressed isometrics in total, were analysed in CAESAR II against the ISO 14692 allowable stress envelopes, with soil-pipe interaction modelled to the American Lifelines Alliance (2001) soil model. Modifications included a support bracing, polystyrene foam, NBR gasket stiffness limits and additional laminate for a

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The report concludes that the results for the transient cases stay within the allowable figures for the applicable piping if valve closure rates are limited and simultaneous hydrant closures are avoided. It recommends that the closure of the open hydrants be distributed over a time interval and that the interval between closures be prevented from dropping below 0.5 seconds. As an alternative, the closure time of each hydrant could be stretched beyond 1 second per inch of line size. Both closure analyses used the same rate of 1 second per inch for each hydrant. Simultaneous closure over 3 seconds exceeded the allowable. Closure at 0.5 second intervals over 8.5 seconds gave 20.3 barg. Both peaks were assessed against the 26.6 barg occasional-load allowable.

Firewater Ring Main Extension in Buried GRP Piping

A new unit was added to an existing gas complex, and the firewater ring main was extended to serve it. Three sets of four 3-inch hydrant valves were modelled, twelve hydrants in total. Each hydrant is required to produce a minimum of 1452 l/min at 7.0 barg, and the hydrant

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Computed stress points for 54-inch pipe in one system against the operational, sustained and hydrotest envelopes, including part factors.

Static Stress Analysis of a Buried GRP Seawater Network

Buried Fibreglass Piping and an Undefined Compression Envelope The underground part of a seawater network at a gas field development was to be built in filament-wound fibreglass reinforced epoxy pipe buried in sand. The scope covered two systems, 1001 and 1002. Each system consists of a header of 54-inch and

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Finite Element Stress Analysis of GRP Couplers (FWC)

This project covered a family of glass fibre reinforced plastic (GRP) couplers, designated FWC, in five configurations: a DN600 coupler in a small (S) and a medium (M) variant, a DN1200 medium coupler, a DN2400 large coupler, and a DN3600 extra large coupler. Each coupler is a long cylindrical GRP

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FRP, GRP, Pipes, Fiberglass

GRP Pipe Supplier Design Review Against a Performance-Based Code

Technical Evaluation of Three Candidate GRP Pipe Suppliers For a glass-reinforced plastic (GRP) pipe system on a project, the client selected three potential GRP pipe suppliers, each to be evaluated from a technical perspective. Each supplier submitted a set of technical documents describing its component design, qualification testing and system

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Beam model of the caisson header under load case 2, with nozzle forces and moments shown in two orthogonal planes.

Strength Assessment of a 42-Inch GRE Seawater Dump Caisson

A seawater dump caisson made of glass-reinforced epoxy (GRE) needed its wall, laminate and joint details defined. The task was to find thicknesses and bonding lengths that would keep stresses within the allowable stress envelope conforming to ISO 14692, and to determine the loads that the restraints, flanges, laminated joints

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