Control of Internal Corrosion Of a Products Pipe Line System

CORROSION ◽  
1955 ◽  
Vol 11 (6) ◽  
pp. 31-36
Author(s):  
P. L DeVERTER ◽  
A. W. JASEK
Keyword(s):  
Internal Corrosion ◽  
Line System ◽  
Pipe Line

Numerical Analysis of Contraction Geometry Effects on Cavitation Choking in a Piping System

2019 ◽  
Author(s):  
Motohiko Nohmi ◽  
Shusaku Kagawa ◽  
Tomoki Tsuneda ◽  
Wakana Tsuru ◽  
Kazuhiko Yokota
Keyword(s):  
Static Pressure ◽  
Sudden Expansion ◽  
Piping System ◽  
Valve Body ◽  
Line System ◽  
Pipe System ◽  
Flow Fluctuation ◽  
Supply Pipe ◽  
Static Pressure Difference ◽  
Pipe Line

Abstract There is a contraction portion in the water supply pipe line system, and cavitation may occur in the contraction when the flow velocity is increased. Such a situation occurs widely in the throat of the fluid machineries and in the vicinity of the valve body of the valve. In operation of the valve, it is well known that a phenomenon occurs in which the flow rate does not increase even if the static pressure difference upstream and downstream of the valve is increased due to the growth of cavitation in the contraction, which is well known as choking . It is not clear what phenomena occurs when cavitation surge occurs in the pipe system in the situation where choking is occurring in the contraction. In this study, cavitation CFD was performed on pipes those have three different geometry contractions. It was revealed that choking occurred when cavitation occurred in any shape. Also, in the case with the sharp contraction part and the sudden expansion, the flow fluctuation at the upstream of the contraction is much weaker than that at the downstream, but in the contraction with the bent part where the centrifugal force acts on the flow, the flow fluctuation at the upstream was found to be strong.

scholarly journals Evaluation of some water saving devices in urban areas: A case study from the Sultanate of Oman

2018 ◽  
Vol 22 (1) ◽  
pp. 18 ◽  
Author(s):  
Hayder A. Abdel Rahman ◽  
Halima A Al-Farsi ◽  
Mushtaque Ahmed ◽  
Matheus F. A Goosen
Keyword(s):  
Case Studies ◽  
Urban Areas ◽  
Water Saving ◽  
Line System ◽  
Significant Difference ◽  
Household Water ◽  
Before And After ◽  
Pipe Line ◽  
Survey Results ◽  
Supply Systems

Water Saving Devices (WSDs) sustain demands for potable water, soften impacts on supply systems and inflict a positive effect on wastewater treatment systems. This study evaluated the effect of some WSDs in Oman. A questionnaire survey and some case studies were used. The survey results revealed that the pipe line system network for water supply accounted for about 67.7%, whereas the rest mainly use tankers. Around 37.2% of the participants received consumed 25000 - 45000 liters per household per month. Case studies showed no significant difference in household water usage before and after installation of WSDs due to pre-installed aerators. Toilet bags and dual flush toilets were not effective promoting users to flush. However, WSDs were significantly effective in restaurants, mosques, hotels and government buildings. Water consumption in shopping centres and hospitals slightly decreased. Retrofitting programs that involve replacement of existing plumbing equipment and residential water audit programs are recommended.

scholarly journals Building a 5000hp, VFD Controlled, Pump Station in 105 Days: “Fact or Fantasy”

1998 ◽  
Author(s):  
Roy C. Spencer ◽  
Lance G. Grainger ◽  
Vince G. Peacock ◽  
Jon Blois
Keyword(s):  
Crude Oil ◽  
Customer Demand ◽  
Line System ◽  
Capacity Increase ◽  
Oil Pump ◽  
Pump Station ◽  
North Eastern ◽  
Pipe Line ◽  
Oil Company

On March 17, 1997 Robicon Corporation was requested, by a large Alberta based oil company, to provide a proposal to manage a turn-key, crude oil, pump station project. The oil company had identified an immediate need to expand their North Eastern Alberta Pipe Line system to allow a higher thru-put into the Hardisty, Alberta area: • the pipe line was capacity restricted and customer demand indicated an immediate requirement to increase pipe line thru-put by 70%; • the capacity increase was required by June 30th or earlier.

scholarly journals Weichselian Juniperus in the Frøslev alluvial fan (Denmark)

1984 ◽  
Vol 32 ◽  
pp. 121-131
Author(s):  
Else Kolstrup ◽  
Kent Havemann
Keyword(s):  
Radiocarbon Dating ◽  
Alluvial Fan ◽  
Line System ◽  
Pipe Line

In the southern part of Jutland pieces of Juniperus wood have been found over long stretches in a trench dug for a Danish gas pipe line system. Radiocarbon-dating, comparison with palaeobotanical records known from other localities, and the stratigraphical sequence in the area, point to a probable age of between the Brcrup/Odderade interstadial(s) and ea. 45.000 years B.P. The morphology of the alluvial fan near Frcslev and its stratigraphy makes it reasonable to assume that the fan has not been affected by the Middle Weichselian ice and its meltwater streams.

Accurate water hammer pressure modeling for automatic modification of stress distribution along multi-segment pipelines

2009 ◽  
Vol 9 (3) ◽  
pp. 269-278 ◽  
Author(s):  
A. Abbasi ◽  
S. R. Sabbagh-Yazdi ◽  
F. M. Wegian
Keyword(s):  
Stress Distribution ◽  
Transient Flow ◽  
Momentum Equation ◽  
Second Order ◽  
Maximum Pressure ◽  
Transient Pressure ◽  
Courant Number ◽  
Line System ◽  
Variable Segment ◽  
Pipe Line

In this study, automatic modification of stresses in rigid parts of a pipe line system is modeled using the trial results of a second-order explicit Finite Volume (FV) Godunov type scheme for one-dimensional transient flow in pipes. The developed model for numerical analysis of transient pressure is based on Riemann solution of continuity equation coupled with the momentum Equation (including convective term). The implementation of boundary conditions such as reservoirs, valves, and pipe junctions in the Godunov approach is similar to that of the method of characteristics (MOC) approach. The computed pressure waves are compared with analytical solution as well as laboratory measurements for single pipes. The model is applied on two classic problems (systems consisting of a reservoir, a pipe and a valve). The second-order Godunov scheme is stable for Courant number less than or equal to unity, and therefore, can be applied for the problems with variable mesh spacing. In order to show the ability of the developed model to deal with such cases, the computed maximum pressure distribution along a pipeline with variable segment coordinates are used for trial modification of pipe thickness and stress distribution.

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