Calibration, inspection and repair of sppk. Appendix I (informative) Purpose and types of spring safety valves. What is agzu and what is it intended for?

QUESTIONS ASKED

1. What functional responsibilities will be added when the rank increases?

According to ETKS upgradable category.

2. What is AGZU and what is it intended for?

AGZU - automated group metering unit.

Designed to measure liquid flow rate (measure the flow rate of each well) and to measure pressure in the reservoir.

AGZU is designed to automatically record the amount of liquid and gas produced from oil wells with subsequent determination of the well's flow rate. The installation allows you to control the operation of wells based on the availability of liquid and gas supply and ensures the transmission of this information, as well as information about the accident, to the control center.

3. What inscriptions are on the doors of the AGZU premises?

Outside the process room, warning signs must be painted in red paint, the inscriptions “Explossion class B-1a and fire hazard category” and “Flammable”, grounding signs, ventilate for at least 20 minutes before entering, energy safety, responsible for fire safety

4. What is SPPK, explain it, what is it for, what pressure is it calibrated for? (for some reason no one asked about calibration dates!)

SPPK – separation (special?) spring safety valve. The valve is calibrated (if the pressure in the vessel is from 30 - 60 atm., it is 10% - 15% more than the permitted pressure. If the pressure in the vessel is up to 30 atm., then it is 10% more than the permitted pressure. The factory value is written on the SPPK plate number, set pressure and date of actual calibration. Calibration period is once every 2 years. The valve is installed to prevent overpressure.

Specially spring safety valve installed on vessels, apparatus and pipelines of workshops / areas /

The design of the spring valve must include a device for checking the proper functioning of the valve in operating condition by forcing it to open during operation of the vessel.

The need and timing of checking the operation of the valve in working condition by forced opening should be determined by: at least once every 10 days, for vessels (devices) of technological installations (DNS, KNS, UPSV, UPN, etc.), and at least once every 3 (three) days for separation tanks AGZU. The time and date of checking the operation of the valve in working condition, by forced opening, must be recorded by the maintenance personnel with an entry in the logbook (well pad maintenance logbook).

Adjusting the safety valves to the opening pressure - set pressure/cotton/ is produced at a special stand.

The valve setting pressure is determined based on the operating pressure in the vessel, apparatus or pipeline, based on the approved technological regulations.

Rules for hot work in pumping stations and tanks.

Hot work in technological pumping stations, compressor stations and other production premises:

1. O.r. in industrial premises should be started only if there are no explosive substances in the air or their presence is not higher than the maximum permissible concentration.

2. Before the start of the o.r. in technological pumping and compressor stations it is necessary:

Stop pumps and compressors;

Close the valves and install plugs at the inlet and outlet;

Free the pipelines from product residues and reduce the pressure to atmospheric;

Blow off technological communications undergoing repairs with live steam;

Conduct gas analysis;

If necessary, thoroughly clean and rinse with water the sewer trays and gutters, and seal the well hatches.

3. During the O.R. It is necessary to ensure constant ventilation of the room and establish control over the state of the air environment.

4. In the event of an increase in the content of explosive and fire hazardous and harmful substances in the air, o.r. must be stopped immediately.

5. Trenches, trays and other devices in which liquids, gases or vapors may accumulate must be protected from sparks.

Hot work inside apparatus, tanks, wells and pipelines pumping explosive, fire-hazardous and toxic products:

6. O.r. should be started only after complete completion of the preparatory work provided for by the work permit for hazardous gas work, and also if the content of harmful vapors and gases does not exceed the maximum permissible concentration.

7. All devices must be stopped, de-energized, and freed from toxic products.

8. Containers must be steamed and ventilated.

9. Take and analyze air samples at ten points.

10. When carrying out o.r. inside tanks and apparatus it is necessary to provide ventilation and lighting for the workplace.

11. As a rule, one person should work in a container or apparatus, with two people appointed as observers.

The PPK spring safety valve is installed on pressure vessels, relieves excess pressure, and protects the vessels from rupture.

Device: 1-seat, 2-plate, 3-rod, 4-spring, 5-handle, 6-body.

Principle of operation: At the activation pressure of the PPK, the gas lifts the plate and exits through the gas outlet into the flare or discharge line of the PPK, a hissing is heard. When testing the valve, we lift the stem by the handle, the plate rises under pressure, and a hissing or whistling sound is heard. This is a valve check, which is carried out once a shift in winter, once a week in summer, and once a year the valve is calibrated (checked according to schedule) with spring tension for the PPK response pressure and sealing.

A safety valve (hereinafter referred to as PC) is a predominantly direct-acting pipeline fitting (there are also PCs controlled by pilot or pulse valves), designed for emergency bypass (discharge) of the medium when the pressure in the pipeline exceeds a predetermined one. After releasing excess pressure, the PC must close hermetically, thereby stopping further release of the medium.

In these instructions, 2 terms are used:

1. Setting pressure (hereinafter referred to as Рн) – this is the greatest redundant pressure at the valve inlet (under the spool) at which the valve is closed and sealed. When pH is exceeded, the valve must open to such an amount as to ensure the required flow of medium to reduce the pressure in the pipeline or vessel.

2. Opening start pressure (hereinafter referred to as Рн.о.) is the pressure at which the so-called “pop” in industrial jargon occurs, i.e. the pressure at which the valve spool opens by a certain amount, releases some of the pressure and then closes back. “Cotton” is clearly distinguishable in gaseous media; in liquid media, this concept is defined with great difficulty.

Checking the settings and functionality must be carried out at least once every 6 months in accordance with GOST 12.2.085 “Pressure vessels. Valves are safety safety requirements."

Pressure pH can only be checked on so-called "full consumable» stands, i.e. those that repeat the operating parameters of the pipe (vessel) in terms of pressure and flow. Considering the variety of objects on which PCs are installed, even within one enterprise, it is not possible to have such a number of stands.

Therefore, when checking and configuring the PC, the determination of pressure pH is used. O. Based on numerous experiments over many years of practice, it has been established that Rn. O. should be higher than pH by no more than 5-7% (10% in Western standards).

Checking valves for functionality and pressure pH. O. held at "no expense" stands, a typical representative of which is the stand for testing and adjusting safety valves SI-TPA-200-64 produced by the Design Bureau of Pipeline Fittings and Special Works.

Stand for testing and adjusting safety valves SI-TPA-200-64 provides the following pneumatic tests (medium - air, nitrogen, carbon dioxide, other non-flammable gases):

- tests for tightness of the seat-body connection;

- tests for tightness of the seat-spool pair (tightness in the valve);

- performance tests (operation tests);

- settings for response pressure.

It is possible to manufacture a stand complete with water testing.

The stand provides testing of pipeline fittings with a flange type of connection (threaded connection as an option)

maximum diameter 200. The maximum test pressure depends on the type of pressure regulator supplied as part of the control panel; the basic configuration of the control panel is a regulator of 0 to 1.6 MPa. Testing of valves with union connection is carried out using an adapter (not included in the delivery set).

The test pressure source is not included in the scope of delivery.

It is possible to equip it with a pressure source according to the customer’s technical specifications.

Test bench SI-TPA-200-64 passed UkrSEPRO certification, supplied complete with operating instructions and passport.

Adjustment (setting) of safety valves to operate at a given pressure is carried out:

Before installation. After a major overhaul, if safety valves were replaced or overhauled (complete disassembly, grooving of sealing surfaces, replacement of chassis parts, etc.), in case of spring replacement. During periodic inspection. After emergency situations caused by PC failure.

The actuation of the valves during adjustment is determined by a sharp pop accompanied by the noise of the ejected medium, observed when the spool is torn away from the seat. For all types of PCs, operation is controlled by the beginning of the pressure drop on the pressure gauge.

Before starting work on setting up (checking) the PC, it is necessary to instruct the shift and adjustment personnel involved in the work on adjusting the valves.

Personnel must be well aware of the design features of the PCs being adjusted and the requirements of the instructions for their operation.

GENERAL PROCEDURE FOR CHECKING SAFETY VALVES.

Install on the stand a flange of the type that matches the type of flange of the PC being tested. Install the required gasket. Install the valve onto the stand flange. Tighten the stand screw until the PC is fully secured in the clamps. Create the maximum possible backpressure force on the PC spool. Block the access of the medium under the valve spool using a shut-off device. Supply the medium to the control panel and set the required response pressure (start of opening) at the outlet of the control panel. Open the shut-off device and supply the test medium under the PC spool. Reduce the back pressure force until the valve actuates. Block access to the medium under the PC spool. Re-supply the medium under the PC spool - the valve should operate at the required pressure. Repeat steps 10 and 11 at least 3 times. If it is not possible to adjust the PC properly, return the valve to the RMC for additional grinding of the seat and (or) spool. If the functionality of the PC is confirmed, remove the PC from the stand, having previously shut off the supply of medium under the spool and to the control panel. Fill out the PC operational documentation and the bench work log. Seal the PC and backpressure adjustment mechanisms. Turn off the stand. Drain the water (condensation) from the cavities of the stand, wipe dry, and apply protective lubricant. Ensure that the stand is protected from dust and moisture until the next use.

FEATURES OF ADJUSTING LEVER-WEIGHT VALVES.

Direct-acting lever-load valves are adjusted in the following sequence:

1. The weights on the valve levers are moved to their extreme position.

3. The weight on one of the valves is slowly moved towards the body until the valve is activated.

4. After closing the valve, the position of the weight is fixed with a locking screw.

5. The pressure rises again and the pressure value at which the valve operates is checked. If it differs from the required one, the position of the weight on the lever is adjusted and the correct operation of the valve is re-checked.

6. After completing the adjustment, the position of the weight on the lever is finally fixed with a locking screw. To prevent uncontrolled movement of the load, the screw is sealed.

7. If the backpressure created by the load is insufficient, an additional weight is installed on the lever of the adjustable PC and the adjustment is repeated in the same sequence.

FEATURES OF ADJUSTING DIRECT-ACTING SAFETY VALVES.

1. The protective cap is removed and the adjusting screw is tightened as much as possible (“to the bottom”).

2. The pressure on the bench pressure gauge is set to 10% higher than the calculated (permitted) pressure.

3. By turning the adjusting sleeve counterclockwise, the compression of the spring is reduced to a position at which the valve will operate.

4. The pressure rises again and the value at which the valve operates is checked. If it differs from the required one, then the spring compression is adjusted and the valve is re-checked for operation. At the same time, the pressure at which the valve closes is monitored. The difference between the actuation pressure and the closing pressure should be no more than 0.3 MPa (3.0 kgf/cm2). If this value is greater or less, then it is necessary to adjust the position of the adjusting sleeve.

For this:

For TKZ valves, unscrew the locking screw located above the cover and turn the damper bushing counterclockwise to reduce the drop or clockwise to increase the drop;

For PPK and SPPK valves, the pressure difference between the actuation and closing pressures can be adjusted by changing the position of the upper adjusting sleeve, which is accessed through a hole closed with a plug on the side surface of the body.

5. After completing the adjustment, the position of the adjusting screw is locked using a locknut. To prevent unauthorized changes in the spring tension, a protective cap is installed on the valve, covering the adjusting sleeve and the end of the lever. The bolts securing the protective cap are sealed.

FEATURES OF ADJUSTMENT OF PULSE-SAFETY DEVICES WITH PULSE VALVES USED IN POWER PLANTS.

Answer:
Hello. Calibration is carried out on the basis of the factory

Operating manuals (instructions).

PB 03-583-03 for membrane devices also applies.

There are no similar PBs in the oil and gas industry. It is possible to use the “Operating Procedure...” you specified, if it applies to the oil and gas industry.