Gas distribution point: device requirements for operation

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2020-03-22 19:20:17

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Timing points is designed to automatically reduce the pressure of gas, and further maintaining it at a predetermined level regardless of the flow variations within the rated figures. Consider the features of EMG. timing point

Classification

Hydraulic fracturing are divided according to the method of placing equipment in the following types:

  1. Cabinet-type gas Distribution points. In this case, the equipment is placed in cabinets made of non-combustible materials.
  2. Gas control installation. The equipment is mounted on the frame. It is placed in the room, which is used by itself, or in a room that connected with the aggregates of the open doorway.
  3. Gas Distribution points, block. In this case, the equipment is placed in the container-type building (one or more).
  4. Fixed Timing points. Equipment placed in specially designed premises, facilities or in open areas.

The Fundamental difference between hydraulic fracturing of the latter type is that they are not the typical product to factory readiness.

Requirements to industrial premises

Timing points with pressure up to 0.6 MPa in utility and industrial plants, boiler houses, stand alone, housed in buildings near the input of the pipeline, in the premises, which is gas-powered equipment. GRU is prohibited to install under stair flights.

Device gas distribution points in the basement, the basement of the buildings, appurtenances to buildings such as hospitals, schools, kindergartens, administrative and residential buildings is not permitted.

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Separately located hydraulic fracturing should have one floor and roof combined. The roof should be legkousvaivaemyh (weight of 1 m of the ceiling – is not more than 120 kg). timing point for the closet

Not allowed to install ventilation and flues in separating ceilings and walls of buildings to which is attached a Timing point. All premises shall be provided with artificial and natural lighting, constant ventilation system (natural) with a triple air exchange.

Lighting and electrical equipment are made of flameproof materials. The inputs of the power supply networks must be cable.

In the regulatory hall can accommodate telephone. However, he needs to be protected from explosions.

Heating

When mounting the local heating system placed in an isolated room with a separate exit. It must be separated from other areas Timing point Solid walls of fireproof and gastight materials. The temperature should be no more than 130, heating equipment – 95 degrees.

For the PIU should be provided for lightning protection. The floors are made of materials that prevent the formation of sparks.

Additional requirements

On the facade of the building in a conspicuous place strike a warning label "Flammable". The letters shall be in height not less than 300 mm.

The Door of the gas-distributing point outwards. Canvas sheathed galvanized steel (0.8 mm thick).

Hardware

It is with hydraulic fracturing. The equipment of gas-distributing point includes:

  • Pressure Regulator that automatically reduce pressure and maintain it at a predetermined level.
  • Safety shut-off valve. The reduction/pressure increase due to it will automatically shut off gas.
  • Escape safety device. It provides relief of excess gas into the atmosphere required to maintain the pressure level. The unit is connected to the output pipeline or flow meter (counter).
  • Filter to eliminate the mechanical impurities.

timing point block

Before the shut-off valve is set to bypass (bypass pipeline) with 2 shut-off devices arranged in series. By-pass gas during inspection and repair of the equipment on the lines. For points with pressure greater than 0.6 MPa, and high (over 5 thousand m/h) bandwidth of the bypass pipeline is installed an additional line regulation.

Test metrics

Using special measuring tools to determine:

  • Gas Pressure before and behind the regulator. For this purpose, recording and indicating pressure gauges.
  • The pressure drop across the gas filter. These figures are verified by the technical manometers or differential pressure gage.
  • The Temperature of the gas. To determine the use of recording and indicating thermometers.

Purge and drain pipelines

They are used to vent gas to atmosphere and venting equipment. Purge the pipelines are installed at:

  • The Input pipeline for the first connecting device.
  • The Bypass between the locking mechanisms.
  • The Site with the equipment disconnected for repair and inspection.

Piping output to places where it is safe dispersion of the gas (at least 1 m above the eaves of structures). operationgas-distributing point

By locking devices shall be capable of disabling the timing points, measuring instruments and equipment without shutting down the gas supply.

Controllers

The fracture can be single or double. In the first input pressure is adjusted to output one, the second, respectively, the two regulators installed in series. The device performance should be about the same.

Single-stage models are used, typically, when the difference of the indices of the input and output pressure in the range of 0.6 MPa.

Parts of the selection pulse for regulators and safety shut-off valves are identified in the passport of the equipment, but they can change.

Start on gas distribution points in operation

It is carried out by written order recorded in the plugin log. Before starting to read the contents of the works that have been made since the stop and also the reasons for the termination of hydraulic fracturing.

The start is done in 2 steps:

  • Inspection equipment, fixtures, fittings.
  • Immediate start.

the device of gas-distributing point

Examination

It must say:

  • A Faulty measuring device.
  • Stability of indicators of pressure (located in the redistribution rules). It is defined by opening the tap of the measuring device showing the pressure at the entrance.
  • Completeness of a gate on the entrance. It must be closed.
  • State and completeness of the filter.
  • The completeness of the safety shut-off valve. The hammer and levers must be pulled out of engagement, the crane line must be closed.
  • A Faulty pressure regulator. The pilot screw needs to be unscrewed, the faucet on the line to it must be in the closed position.

Also during the inspection you must ensure that:

  • On the part of the entrance process line valve is assembled and closed.
  • Safety sbresny the valve is serviceable, is assembled, and the tap to it is opened.
  • Both valves on the bypass are collected, closed the tap between them in the purge line is opened.

Run EMG

We are open:

  • Tap the purge of the pipeline.
  • Tap on the manometer.
  • Valve on the gas outlet from the item.
  • Tap on the pulse line to the device for regulating the pressure.

requirements for production facilities of gas-distributing point

Next specialist:

  • Introduces the engagement levers safety shut-off valve.
  • Slowly opens the valve at the entrance. The gas pressure must be zero.
  • Closes the tap purge line after the input of the gate valve.
  • Slowly turns the screw of pilot regulator brings the pressure to work.
  • Checks the stability of the regulator, opens the impulse line tap to USC and enters into engagement of the hammer and the yoke.
  • Slowly closes the tap blow-off pipe.
  • Taps to the working device, verifies the absence of faults, leaks.

The journal entry is made on works performed.


Article in other languages:

AR: https://www.tostpost.com/ar/business/21633-gas-distribution-point-device-requirements-for-operation.html

BE: https://www.tostpost.com/be/b-znes/39116-gazarazmerkaval-ny-punkt-prylada-patrabavann-da-ekspluatacy.html

DE: https://www.tostpost.com/de/business/38644-gasverteilung-punkt-das-ger-t-anforderungen-an-den-betrieb.html

ES: https://www.tostpost.com/es/centro-de/38405-la-distribuci-n-de-gas-p-rrafo-un-dispositivo-requisitos-para-el-funci.html

HI: https://www.tostpost.com/hi/business/23169-gas-distribution-point-device-requirements-for-operation.html

JA: https://www.tostpost.com/ja/business/21182-gas-distribution-point-device-requirements-for-operation.html

KK: https://www.tostpost.com/kk/biznes/39520-gaz-taratu-punkt-rylysy-paydalanu-a-oyylatyn-talaptar.html

PL: https://www.tostpost.com/pl/biznes/41224-rozrz-d-polecenie-urz-dzenie-wymagania-do-pracy.html

PT: https://www.tostpost.com/pt/neg-cios/40846-distribui-o-de-g-s-pip-um-dispositivo-os-requisitos-de-opera-o.html

TR: https://www.tostpost.com/tr/business/36029-her-madde-cihaz-kullan-m-gereksinimleri.html

UK: https://www.tostpost.com/uk/b-znes/39952-gazorozpod-l-niy-punkt-pristr-y-vimogi-do-ekspluatac.html

ZH: https://www.tostpost.com/zh/business/37436-gas-distribution-point-device-requirements-for-operation.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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