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Work > T-2 > Flashcards

T-2 Flashcards

1
Q

Four Measured Variables

A
  1. Pressure
  2. Temperature
  3. Level
  4. Flow
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2
Q

Pressure: Low Pressure

A

Pressure in a process component less than the minimum operating pressure.

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3
Q

Pressure: High Pressure

A

Pressure in a process component in excess of the maximum operating pressure, but less than the MAWP.

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4
Q

Pressure: MAOP

A

Pipelines. Highest operating pressure allowable at any point in a pipeline system during normal flow or static conditions.

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5
Q

Pressure: MAWP

A

The highest operating pressure allowable at any point in any component other than a pipeline during normal operating or static conditions.

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6
Q

Pressure: Overpressure

A

Pressure in a process component in excess of the maximum allowable working pressure.

Also and Undesirable Event.

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7
Q

Temperature: Low Temp

A

Temperature in a process component less than the minimum operating temp.

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8
Q

Temperature: High Temp

A

Temperature in a process component in excess of the design operating temperature.

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9
Q

Temperature: Excess Temp

A

Temperature in a process in excess of the rated working termperature.

Also Undesirable event.

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10
Q

Level: Low Liquid Level

A

Liquid Level in a process component below the lowest operating level.

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11
Q

Level: Gas Blow-by

A

The discharge of gas from a process component through a liquid outlet.

Also and Undesirable Event.

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12
Q

Level: High Liquid Level

A

Liquid level in a process component above the highest operation level.

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13
Q

Level: Liquid Overflow

A

The discharge of liquids from a process component through a gas outlet.

Also an Undesirable Event.

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14
Q

Flow: Low Flow

A

Flow in a process component less than the minimum operating flow rate.

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15
Q

Flow: Backflow

A

Fluid flow in a process component opposite to the normal flow direction.

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16
Q

8 Undesirable Events

(LOUDLEEG)

A
  1. Overpressure
  2. Under Pressure
  3. Liquid Overflow
  4. Gas Blow-by
  5. Leak
  6. Excess Temperature
  7. Direct Ignition Source
  8. Excessive Combustible Vapors in the Firing Chamber
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17
Q

Emergency Support System

(ESS)

A
  1. Containment
  2. Emergency Shutdown Systems (ESD)
  3. Fire Loop
  4. Gas Detection System
  5. SSSV
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18
Q

Normally Closed Valve

A

A valve that will shift to the closed position upon loss of power medium

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19
Q

Types of Normally Closed Valves

A
  • Shutdown Valve
  • Surface Safety Valve
  • Underwater Safety Valve
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20
Q

Normally Open Valve

A

A valve that will shift open upon loss of power medium.

21
Q

Types of Normally Open Valves

A

Blow Down Valve

22
Q

Down-Hole Valves

A

Subsurface Safety Valves:

  • SCSSV - Controlled from the surface
  • SSCSV- Actuated by well pressure
23
Q

Fired Vessel

A

A vessel in which the temp. of a fluid is increased by the addition of heat supplied by a flame within the vessel.

24
Q

Automatically Fired Vessel

A

Fired vessel with the burner fuel controlled by an automatic temperature or pressure.

25
Q

Flame Failure

A

A flame that is inadequate to instantaneously ignite combustible vapors entering the firing chamber.

26
Q

Excessive Combustible Vapors in the Firing Chamber

A

When there are Combustible vapors in addition to those required for normal ignition of either the pilot or main burner.

27
Q

Abnormal Operating Condition

A

When operating variable ranges outside of its normal operating limits

28
Q

Detectable Abnormal Condition

A

An Abnormal Operating Condition that can be automatically detected

29
Q

Failure/Malfunction Difference

A

Failure- Prevents Completion of design function

Malfunction- Does not prevent malfunction, but operates improperly

30
Q

3 Modes of Safety System Operation

A
  1. Automatic Monitoring & Automatic Protective Action if Abnormal conditions occurs
  2. Automatic Protective Action if manually actuated by personnel
  3. Continous protection by support systems that minimize effects of escaping hyrocarbons (ESS)
31
Q

Purpose of Production Platform Surface Safety System

A

Protecting:

  1. Personnel
  2. The Environment
  3. The Facility
32
Q

Objective of a Production Platform Surface Safety System

A

Prevent the release of hydrocarbons from the process and minimize the adverse effects when they occur.

33
Q

Two levels of protection to prevent or minimize the effect of equipment faiure

A
  1. Primary
  2. Secondary
34
Q

Requirements for two levels of protection

A
  1. Independent of and in addition to the control system
  2. Provided by functionally different types of safety devices for a wider spectrum of coverage.
35
Q

TSE

A

Temp. Safety Element. (Fusible Element)

36
Q

USH

A

Flame Detector

37
Q

TSH

A

Thermal Detector

38
Q

YSH

A

Smoke Detector

39
Q

ASH

A

Combustible Gas Detector

40
Q

What must all gas compressors be equipped with?

A
  • PSH, PSL, PSV, LSH, and LSL on the suction scrubber and each interstage scrubber
  • TSH on each discharge cylinder
  • BDV on discharge line if horsepower > 1000
41
Q

How long must fuel last for power during platform shutin?

A

30 MInutes

42
Q

When can you leave the LSL off of a compressor scrubber?

A

If there is a choke on the dump line.

43
Q

How long until the SSV have to be shut after actuation of ESD?

A

45 seconds

44
Q

How long until SCSSV must close?

A

2 minutes after SSV.

45
Q

5 Requirements for using Boarding Shutdown Valve (BSDV)

A
  1. Design Pressure of all components fully rated for Maximum Source Pressure
  2. BSDV fire rated for 30 minutes
  3. BSDV is within 10 feet of boarding pipeline riser access
  4. TSE located within 5 feet of BSDV
  5. BSDV tested monthly
46
Q

What setting must the PSH be?

A
  • No higher than 15% or 5 PSI, whichever is greater, above operating pressure
  • 5% or 5 PSI, whichever is greater, of the relief valve set pressure
47
Q

What setting must PSV be?

A

No higher than MAAWP of the vessel or pipeline

48
Q

ASH Set point and tolerance

A

Set points are 25 and 60 percent of LEL. LEL is 5%. Tolerance is 5% of full scale reading.

49
Q

Flowiine FSV SCSSV, Tubing Plug, Injection Valve Tolerances.

A

200 cc of liquid per minute, 5 cubic feet of gas per minute.

Work (5 decks)

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