Gas Pressure Regulation and Gas Pressure Regulation and - - PowerPoint PPT Presentation

Gas Pressure Regulation and Gas Pressure Regulation and Overpressure Protection Overpressure Protection

Protection Against Accidental Protection Against Accidental Overpressure Overpressure

A A Pipeline Connected to a Gas Source that Pipeline Connected to a Gas Source that could exceed could exceed MAOP MAOP as the result of Failure, as the result of Failure, must have Relieving or Limiting Devices must have Relieving or Limiting Devices meeting §192.199 & meeting §192.199 & §192.201 §192.201

§192.195(a) §192.195(a)

Protection Against Accidental Protection Against Accidental Overpressure Overpressure

Additional Requirements for Distribution Additional Requirements for Distribution

Regulation Devices that Meet: Regulation Devices that Meet:

Pressure Pressure Load Load Other Service Conditions Other Service Conditions

During Normal Operation During Normal Operation

§192.195(b) §192.195(b)

Protection Against Accidental Protection Against Accidental Overpressure Overpressure

and that could be and that could be activated in activated in the event the event

• f failure
• f failure of some
• f some

portion of the system; portion of the system; and and Be designed to Be designed to prevent accidental prevent accidental

• verpressuring.
• verpressuring.

§192.195(b) §192.195(b)

Control of Pressure from High- Control of Pressure from High- Pressure Distribution Pressure Distribution MAOP < 60# MAOP < 60#

Service Regulato Service Regulators have the Following rs have the Following Characteristics Characteristics - No Other Protection Required No Other Protection Required

1) Capable of reducing pressure for household 1) Capable of reducing pressure for household appliances. appliances.

§192.197(a) §192.197(a)

MAOP < 60# MAOP < 60#

2) Single Port Valve with 2) Single Port Valve with Proper Orifice Proper Orifice for Maximum for Maximum Pressure Pressure @ Reg. Inlet. @ Reg. Inlet. 3) Seat Made of 3) Seat Made of Resilient Material. Resilient Material. 4) Pipe Connections not 4) Pipe Connections not Excee Exceeding 2" Diameter. ing 2" Diameter.

§192.197(a) §192.197(a)

MAOP < 60# MAOP < 60#

5) 5) Capable Capable of

• f Accurately

Accurately limiting during Normal limiting during Normal and No-flow Conditions. and No-flow Conditions. 6) Self- 6) Self- Contained Contained without without External External Static or Control Lines. Static or Control Lines.

§192.197(a) §192.197(a)

Protection Required Protection Required

If the Regulators used If the Regulators used do not meet do not meet ALL ALL Requirements Requirements Or the Gas Contains Materials that Interferes Or the Gas Contains Materials that Interferes with with the Operation of Regulators the Operation of Regulators

Must be Suitable Devices to Prevent Must be Suitable Devices to Prevent Overpressure of Overpressure of Connected Appliances Connected Appliances

§192.197(b) §192.197(b)

Control of Pressure from High-Pressure Control of Pressure from High-Pressure Distribution Distribution MAOP > 60# MAOP > 60#

One of the following Methods One of the following Methods must must be Used be Used to Regulate and to Regulate and Limit, to the Limit, to the Maximum Safe Maximum Safe Value Value, the Pressure Delivered to the , the Pressure Delivered to the Customer: Customer:

§192.197(c) §192.197(c)

MAOP > 60# MAOP > 60#

(1) A (1) A Regulator Meeting the Six Regulator Meeting the Six Requirements and: Requirements and:

Another Regulator installed Another Regulator installed Upstream from the Service Upstream from the Service Regulator and a device installed Regulator and a device installed between the Two Regulators between the Two Regulators to limit Inlet Pressure on the to limit Inlet Pressure on the Service Regulator less than 60 Service Regulator less than 60 psig during Failure. psig during Failure.

§192.197(c) §192.197(c)

MAOP > 60# MAOP > 60#

(2) A Service Regulator (2) A Service Regulator and Monitor and Monitor

§192.197(c) §192.197(c)

MAOP > 60# MAOP > 60#

(3) A (3) A service regulator with service regulator with sufficient sufficient Internal Relief Internal Relief Capacity Capacity

• r Additional Device to limit delivery
• r Additional Device to limit delivery

pressure to a Safe Value pressure to a Safe Value Used when inlet pressure does not exceed Used when inlet pressure does not exceed Manufacturer's rating or 125 psig, whichever Manufacturer's rating or 125 psig, whichever is Lower. is Lower.

§192.197(c) §192.197(c)

MAOP > 60# MAOP > 60#

(4) A (4) A Service Regulator and an Automatic Service Regulator and an Automatic Shutoff device requiring Manual Reset. Shutoff device requiring Manual Reset.

§192.197(c) §192.197(c)

Design of Pressure Relief and Limiting Design of Pressure Relief and Limiting Devices Devices

Each device must: Each device must:

a) Not be Impaired by Corrosion; a) Not be Impaired by Corrosion; b) Have Valves and Seats designed not to b) Have Valves and Seats designed not to Stick in Stick in a Position Rendering the Device a Position Rendering the Device Inoperative; Inoperative; c) Designed and Installed so it can be Readily c) Designed and Installed so it can be Readily Operated; Operated;

§192.199 §192.199

Design of Pressure Relief and Design of Pressure Relief and Limiting Devices Limiting Devices

d) Supports made of non- d) Supports made of non- combustibles combustibles e) Discharge e) Discharge Stacks Stacks prevent Accumulations prevent Accumulations and Discharge without and Discharge without Hazard; Hazard; f) Prevent f) Prevent Hammering Hammering of the

• f the

Valve and Impairment Valve and Impairment of Capacity;

• f Capacity;

§192.199 §192.199

Design of Pressure Relief and Limiting Design of Pressure Relief and Limiting Devices Devices

g) Installed to Prevent g) Installed to Prevent Single Incident from Single Incident from affecting Regulator and affecting Regulator and Device; and Device; and h) Prevent unauthorized h) Prevent unauthorized Operation of a stop valve Operation of a stop valve Rendering a Device Inoperative Rendering a Device Inoperative

§192.199 §192.199

Required Capacity of Pressure Required Capacity of Pressure Relieving and Limiting Stations Relieving and Limiting Stations

Each station Each station or group of stations must have

• r group of stations must have

enough capacity, enough capacity, and and set to operate and set to operate and insure the following: insure the following:

1) Low pressure distribution, 1) Low pressure distribution, protect connected utilization protect connected utilization equipment. equipment.

§192.201(a) §192.201(a)

Required Capacity of Pressure Required Capacity of Pressure Relieving and Limiting Stations Relieving and Limiting Stations

2) Pipelines other than low pressure 2) Pipelines other than low pressure distribution systems: distribution systems: MAOP > 60 # MAOP > 60 # MAOP + 10% or 75% MAOP + 10% or 75% SMYS, whichever is SMYS, whichever is lower; lower;

MAOP > 12 # < 60 # MAOP > 12 # < 60 #

MAOP + 6 # MAOP + 6 # MAOP < 12# MAOP < 12# MAOP + 50% MAOP + 50%

§192.201(a) §192.201(a)

Required Capacity of Pressure Required Capacity of Pressure Relieving and Limiting Stations Relieving and Limiting Stations

a) Multiple feeds must have Devices installed At a) Multiple feeds must have Devices installed At each station to insure Against Failure of each station to insure Against Failure of the the Largest Capacity Component. Largest Capacity Component. b) Devices must be Installed at or Near Each b) Devices must be Installed at or Near Each Station in a Low Pressure Distribution System, Station in a Low Pressure Distribution System, with capacity to Limit Main Pressure at Safe with capacity to Limit Main Pressure at Safe Values. Values.

§192.201 §192.201

Instrument, Control, and Sampling Pipe Instrument, Control, and Sampling Pipe and Components and Components

Materials and Design. All materials and Materials and Design. All materials and Components must be Designed to meet Components must be Designed to meet Service Conditions and the Following: Service Conditions and the Following:

1) Takeoff fittings, bosses, or Adapters must 1) Takeoff fittings, bosses, or Adapters must withstand Temperatures, Pressures and withstand Temperatures, Pressures and Stresses without Fatigue Failure. Stresses without Fatigue Failure.

§192.203(b) §192.203(b)

Instrument, Control, and Sampling Pipe Instrument, Control, and Sampling Pipe and Components and Components

2) Except for takeoff lines that can be isolated from 2) Except for takeoff lines that can be isolated from sources of pressure by other sources of pressure by other valving, alving, a shutoff valve shutoff valve installed in each takeoff line and blowdown installed in each takeoff line and blowdown valves installed where necessary. valves installed where necessary. 3) Brass or 3) Brass or copper may copper may not be used at not be used at temperature temperatures > 400 ºF > 400 ºF

§192.203(b) §192.203(b)

Instrument, Control, and Sampling Pipe Instrument, Control, and Sampling Pipe and Components and Components

4) Pipe or Components containing Liquids must be 4) Pipe or Components containing Liquids must be Protected from Protected from Freezing Freezing 5) Pipe or Components 5) Pipe or Components containing liquids must containing liquids must have Drains or Drips have Drains or Drips 6) Pipe or Components subject to Clogging must 6) Pipe or Components subject to Clogging must have Provisions for Cleaning have Provisions for Cleaning

§192.203(b) §192.203(b)

Instrument, Control, and Sampling Pipe Instrument, Control, and Sampling Pipe and Components and Components

7) Provide safety under Anticipated 7) Provide safety under Anticipated Operating Stresses Operating Stresses

§192.203(b) §192.203(b)

8) Expansion joints may not be slip type 8) Expansion joints may not be slip type 9) Damage to Any One Control Line may 9) Damage to Any One Control Line may not make both the Regulator and Protective not make both the Regulator and Protective Device Inoperative. Device Inoperative.

Instrument, Instrument, Control

Control, and Sampling Pipe

, and Sampling Pipe and Components and Components

§192.203 §192.203(b)

(b)

Procedural Manual for Operations, Procedural Manual for Operations, Maintenance, and Emergencies Maintenance, and Emergencies

Maintenance Maintenance and normal operations. The and normal operations. The manual manual must must include procedures for the include procedures for the following: following: Operating, Maintaining, and Operating, Maintaining, and Repairing the Repairing the Pipeline in accordance with each of the Pipeline in accordance with each of the requirements requirements of this Subpart and Subpart M

• f this Subpart and Subpart M
• f this Part
• f this Part

§192.605(b) §192.605(b)

Compressor Stations: Inspection and Compressor Stations: Inspection and Testing Relief Devices Testing Relief Devices

a) Except for a) Except for rupture discs, each Pressure rupture discs, each Pressure Relieving Device in a Compressor Station must Relieving Device in a Compressor Station must be Inspected and Tested per §§192.739 & be Inspected and Tested per §§192.739 & 192.743, 192.743, and and be Operated Periodically. be Operated Periodically. b) Defective or b) Defective or Inadequate Equipment found Inadequate Equipment found must be Repaired or Replaced. must be Repaired or Replaced.

§192.731 §192.731

Compressor Stations: Inspection and Compressor Stations: Inspection and Testing Relief Devices Testing Relief Devices

c) Each Remote Control Shutdown c) Each Remote Control Shutdown Device must be Inspected ... Device must be Inspected ... to Determine that to Determine that it Functions Properly. it Functions Properly.

§192.731 §192.731

Pressure Limiting and Regulating Stations: Pressure Limiting and Regulating Stations: Inspection and Testing Inspection and Testing

(a) Each limiting device and regulating station (a) Each limiting device and regulating station and its equipment must be tested each and its equipment must be tested each calendar calendar year not exceeding 15 mo. intervals to year not exceeding 15 mo. intervals to determine - determine -

1) In good mechanical condition; 1) In good mechanical condition;

§192.739 §192.739

Pressure Limiting and Regulating Stations: Pressure Limiting and Regulating Stations: Inspection and Testing Inspection and Testing

2) Adequate from the 2) Adequate from the standpoint of capacity standpoint of capacity and reliability of and reliability of

• peration for
• peration for the

the service in which it service in which it is employed; is employed;

§192.739 §192.739

Pressure Limiting and Regulating Stations: Pressure Limiting and Regulating Stations: Inspection and Testing Inspection and Testing

3) Except as provided by par. (b) of 3) Except as provided by par. (b) of this this section, set to section, set to control or relieve control or relieve at the at the correct pressure consistent with the limits of correct pressure consistent with the limits of §192.201(a); and 192.201(a); and 4) Properly installed and protected from 4) Properly installed and protected from dirt, dirt, liquids, or other conditions that might liquids, or other conditions that might prevent proper operation. prevent proper operation.

§192.739 §192.739

Pressure Limiting and Regulating Stations: Pressure Limiting and Regulating Stations: Inspection and Testing Inspection and Testing

(b) (b) For steel pipelines For steel pipelines whose MAOP is whose MAOP is determined under determined under §192.619(c), if the §192.619(c), if the MAOP is 60 psi or MAOP is 60 psi or more, the control more, the control

• r relief pressure
• r relief pressure

limit is as follows: limit is as follows:

§192.739

If the MAOP produces a hoop stress that is: Then the pressure limit is: Greater than 72% Greater than 72% SMYS SMYS MAOP + MAOP + 4% 4% Unknown as a Unknown as a percentage of SMYS percentage of SMYS A pressure A pressure that that will will prevent the unsafe prevent the unsafe

• peration
• peration

Pressure Limiting and Regulating Stations: Pressure Limiting and Regulating Stations: Telemetering or Recording Gages Telemetering or Recording Gages

a) Each distribution a) Each distribution system supplied system supplied by more than by more than

• ne regulating
• ne regulating

station must station must be equipped be equipped with telemetering with telemetering

• r recording gages...
• r recording gages...

§192.741 §192.741

Pressure Limiting and Regulating Stations: Pressure Limiting and Regulating Stations: Telemetering or Recording Gages Telemetering or Recording Gages

b) Single feed systems; the operator b) Single feed systems; the operator shall shall determine the necessity ... determine the necessity ... taking into taking into consideration the number of customers consideration the number of customers supplied, the supplied, the operating

• perating pressures, the

pressures, the capacity of the installation, and the capacity of the installation, and the

• perating conditions.
• perating conditions.

§192.741 §192.741

Pressure Limiting and Regulating Stations: Pressure Limiting and Regulating Stations: Telemetering or Recording Gages Telemetering or Recording Gages

c) If there are indications of c) If there are indications of high or low pressure, high or low pressure, equipment must be equipment must be inspected and necessary inspected and necessary corrective actions taken. corrective actions taken.

§192.741 §192.741

Pressure Limiting and Regulating Stations: Pressure Limiting and Regulating Stations: Testing of Relief Devices Testing of Relief Devices

Pressure relief devices at pressure limiting stations Pressure relief devices at pressure limiting stations and pressure regulating stations must have and pressure regulating stations must have sufficient capacity to protect the facilities to which sufficient capacity to protect the facilities to which they are connected consistent with the pressure they are connected consistent with the pressure limits of §192.201(a). This capacity must be limits of §192.201(a). This capacity must be determined at intervals not exceeding 15 months, determined at intervals not exceeding 15 months, but at least once each calendar year, by testing the but at least once each calendar year, by testing the devices in place or by review and calculations. devices in place or by review and calculations.

§192.743 §192.743

Pressure Limiting and Regulating Stations: Pressure Limiting and Regulating Stations: Testing of Relief Devices Testing of Relief Devices

If If review and calculations ar review and calculations are used to determine if a e used to determine if a device has sufficient capacity, the calculated device has sufficient capacity, the calculated capacity must be compared with the rated or capacity must be compared with the rated or experimentally determined relieving capacity of experimentally determined relieving capacity of the device for the conditions under which it the device for the conditions under which it

• perates.
• perates.

§192.743(b) §192.743(b)

Pressure Limiting and Regulating Stations: Pressure Limiting and Regulating Stations: Testing of Relief Devices Testing of Relief Devices

After the initial calculations, subsequent After the initial calculations, subsequent calculations need not be made if the annual review calculations need not be made if the annual review documents that parameters have not changed to documents that parameters have not changed to cause the rated or experimentally determined cause the rated or experimentally determined relieving capacity to be relieving capacity to be insufficient. insufficient.

§192.743(b) §192.743(b)

Pressure Limiting and Regulating Stations: Pressure Limiting and Regulating Stations: Testing of Relief Devices Testing of Relief Devices

c) If the capacity is insufficient, c) If the capacity is insufficient, a new or additional device a new or additional device must be installed to provide must be installed to provide the additional capacity the additional capacity required by paragraph required by paragraph (a) of this section. (a) of this section.

§192.743 §192.743