Pipelines

DYSTIFF s.r.o., Olomouc

Revamping of the Vacuum Distillation Unit

Piping stress and strength calculation of 30 pipelines according to B31.3.

Medium: process gas, heavy vacuum gas, vacuum residue

Loads:- Temperature (up to 400°C)- Pressure (up to 4 MPa)- Wind (160 km/h)- Seismic load (UBC 1997 – Seismic zone 3)

Types of performed hospitalizations:- nozzle loads reduction- stress peak reduction- displacements reduction during occasional loads

Types of changes:- change type of supports - adding new supports - change of piping geometry

Some plots of pipelines

Some plots of pipelines

Some plots of pipelines

Some plots of pipelines

Some plots of recommended improvements

Some plots of recommended improvements

Some plots of recommended improvements

Some plots of recommended improvements

Hot Reheated Steam Piping

Stress analysis of Hot Reheated Steam (HRH).Branch from two boilers to turbine body and to condenser calculated according to B31.1. Support design evaluated.

Medium: superheated steam

Loads:- Temperature (570°C)- Pressure (2,65 MPa)- Wind (110 km/h)- Seismic load (UBC 1997 – Seismic zone 2A)

Types of performed optimalizations:

- boilers, condenser and turbine loads reduction

- stress peak reduction

- displacements reduction during occasional loads

Types of changes:

- change type of supports

- change of piping geometry

Plot of pipeline

LP Steam Piping

Stress analysis of LP Steam. Branches from two boilers to turbine body and to deaerator according B31.1. Support design evaluated.

Medium: LP steam

Loads:- Temperature (314°C)- Pressure (0,96 MPa)- Wind (110 km/h)- Seismic load (UBC 1997 – Seismic zone 2A)

Plot of pipeline

Piping of Coke Removal Unit

Stress analysis pipelines according to B31.3

Medium: quench oil

Loads:- Temperature (200/350°C)- Pressure (1,25 MPa)- Wind (45 m/s)- Seismic load (UBC 1997 – Seismic zone 2A)

Types of performed optimalizations:

- nozzle loads reduction

- stress peak reduction

- displacements reduction during occasional loads

Types of changes:

- change type of supports

Plot of pipeline

Plot of pipeline

Plots of recommended improvements

Plot of recommended improvements

MUG drying piping systems

Stress analysis pipelines according to B31.3

Medium: liquid ammonia

Loads:- Temperature (up to 55°C)- Pressure (up to 36 MPa)- Wind (160 km/h)- Seismic load (UBC 1997 – Seismic zone 2A)

Plot of piping (first part)

Plot of piping (second part)

Dynamic calculation model of the vessel 123-F with the shape of the first eigenfrequency

Dynamic calculation model of the vessel 401-C with the shape of the first eigenfrequency

Dynamic calculation model of the vessel 403-F with the shape of the first eigenfrequency

Dynamic calculation model of the vessel 404-F with the shape of the first eigenfrequency

Piping of Heating Station

Piping stress and strength calculation after reconstruction according to B31.3. Spring hangers design evaluated.

Medium: steam

Loads:- Temperature (250°C)- Pressure (0,3 MPa)

Plot of piping

Pipeline Connected to Vacuum Column

Piping stress and strength calculation pipeline connected to vacuum column according to B31.3and attached nozzles according to EN 13445.

Medium: gas hydrocarbon

Loads:- Temperature (395°C)- Pressure (0,27 MPa)

Plot of piping

Plots of nozzles

Auxiliary pipe system of main coolant pump

Piping stress and strength calculation auxiliary pipeline connected to main coolant pump according to NTD (Russian standard for Nuclear Power Plant).

Medium: demineralized water

Loads:- Temperature (up to 150°C)- Pressure (up to 24,5 MPa)

Plot of piping

Hot water transferring pipeline

Piping stress and strength calculation pipeline according to EN 13480.

Medium: water

Loads:- Temperature (80/140°C)- Pressure (1,6 MPa)

Plot of piping