PIPELINE SPECIFICATIONS

1
PIPELINE SPECIFICATIONS

• ABC Company
• ABC Chemical Complex
• Engineering Specifications

2
Scope Comparison

• ASME/ANSI
• Design
• Materials
• Construction
• Assembly
• Inspection
• Testing
• Operations
• Maintenance
• Safety

• DOT 49CFR
• Prescribes minimum safety requirements for
  pipeline facilities
• Legal document enacted by Congress

3
Format Comparison

• ASME/ANSI B31.4
• Scope Definitions
• Design
• Materials
• Dimensional Require.
• Const., Weld, Assb.
• Inspection Testing
• OM Procedures
• Corrosion Control
• Appendices

• DOT 49CFR195
• A General
• B Reporting Accidents
• C Design Requirement
• D Construction
• E Pressure Testing
• F OM

4
Format Comparison 31.8 vs 192

• ASME/ANSI B31.8
• Materials Equipment
• Welding
• Pip Sys Comp Fab
• Design, Inst, and Test.
• OM Procedures
• Corrosion Control
• Miscellaneous
• Offshore Gas Trans.
• Appendices

• DOT 49CFR192
• General
• Materials
• Pipe Design
• Design of Pipeline Components
• Welding of Steel
• General Const. Req.
• Req. for Corrosion Con
• Test Requirements

5
Format Comparison 31.8 vs 192

• See Previous Slide

• Uprating
• Operations
• Maintenance

6
Engineering Specifications

• Exceptions to Code Requirements
• AS DEFINED when Safety considerations in DOT
  49CFR 192 or 195 demand tighter controls in ABC
  Engineering Specification than required in the
  governing design and construction Codes, i.e.
  ASME/ ANSI B31.4

7
Engineering Exceptions-Liquids

• ABC Exceptions to ASME/ANSI B31.4 from DOT
  49CFR195 Requirements
• Subpart A
• Definitions
• Matter Incorporated by Reference
• See Finding Aids in Appendix for DOT 49CFR
• Compatibility necessary for transportation of
  hazardous liquids or carbon dioxide
• Conversion to service
• Responsibility of operator for compliance

8
Engineering Exceptions-Liquids

• Subpart B, Reporting Accidents and Safety Related
  Conditions
• Reporting Accidents and Safety Related Conditions
• Reporting Accidents
• Telephonic notice of certain accidents
• Accident reports
• Reporting safety-related conditions
• Filing safety-related condition reports

9
Engineering Exceptions-Liquids

• Subpart C, Design Requirements
• Design Factor, Cold Expanded and Reheated Pipe
• B31.4
• 75 of the allowable stress as determined by
  para. 402.3.1(a), (b), or (c). Maximum
  0.72x0.750.54
• 195
• 0.54
• 195.120, Passage of Internal Inspection Devices
• Not included in ASME/ANSI B31.4

10
Engineering Exceptions-Liquids

• Subpart D, Construction
• 195.210, Pipeline Location
• Minimum 12-inch cover within 50 feet of private
  dwelling or industrial building or place of
  public assembly.
• 195.234, Nondestructive Examination
• 10 of all production welds for all stress
  levels.
• 100 of all girth welds when installing used
  pipe.
• Minimum 90 in B31.4
• 100 for all tie in welds not hydrotested.
• Minimum 90 in B31.4

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Engineering Exceptions-Liquids

• Subpart D, Construction (Continued)
• Cathodic Protection Systems
• 31.4 195 Install with one year of
  commissioning
• ABC CP system to be commissioned with pipeline.

12
Engineering Exception-Liquids

• Subpart E, Pressure Testing
• General Requirements
• Exclude
• Interstate pipeline constructed before January 8,
  1971
• Intrastate pipeline constructed before October
  21, 1985

13
Engineering Exceptions-Liquids

• Subpart F, Operations and Maintenance
• 195.406, Maximum Operating Pressure
• Paragraph (a)(1)(i) refers to Appendix N,
  Recommended Practice for Hydrostatic Testing of
  Pipelines in Place, ASME/ANSI B31.8, Gas
  Transmission and Distribution Piping. Appendix N
  is generic for all pipelines and DOT required a
  reference in this paragraph to establish criteria
  for maximum operating pressure.
• 80 of test pressure0.8 x 1.25 1.00 design
  pressure
• 195.424, Pipeline Movement
• Reduce pressure to 50 MAOP.

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Engineering Exceptions-Gas

• ABC Exceptions to ASME/ANSI B31.4 Due to 49CFR192
  Requirements
• Subpart A, General
• Definitions
• Administrator
• Class locations
• Incorporation by reference
• Conversion to service subject to this part
• Rules of regulatory construction

15
Engineering Exceptions-Gas

• Subpart B, Materials
• Transportation of pipe. (192.65)
• Pipe with an outer diameter to wall thickness
  ratio of 70 to 1 or more may not be used in a
  pipeline to be operated at a hoop stress of 20
  or more of SMYS if the pipe is transported by
  railroad.

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Engineering Exceptions-Gas

• Subpart C, Pipe Design
• Class Location and Design Factor
• 1. 0.72 (Same as B31.4)
• 2. 0.60 (Safety Factor Increased by 20 from 1)
• 3. 0.50 (Safety Factor Increased by 44 from 1)
• 4. 0.40 (Safety Factor Increased by 80 from 1)
• Previous editions of ASME/ANSI B31.8 used the
  term, Population Density Index with
  Construction Types A, B, C, and D. The Location
  Classes 1, 2, 3, and 4 have replaced the above in
  the definition of design, construction, testing,
  and operating require-ments.

17
Engineering Exception-Gas

• Subpart D, Design of Pipeline Components
• 192.145, Valves
• Valves must be hydrotested at least 1.5 times the
  maximum service rating.
• 192.150, Passage of internal inspection devices
• Each new pipeline must be designed for
  intelligent pigging.
• Operators may petition for approval to not
  comply.
• 192.153, Components fabricated by welding
• Orange-peel bull plugs and/or swages are
  prohibited on ABC pipelines.
• Flat closures and fish tails may not be used on
  piping that either operates at 100 psig or above
  or is gt3 in diameter.

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Engineering Exceptions-Gas

• Subpart E, Welding of Steel in Pipelines
• 192.233 - Miter Joints
• Miter joints are permitted in certain cases for
  DOT gas pipelines.
• ABC specifications prohibit these joints, because
  restrictions are too difficult to follow and
  enforce in construction and maintenance welding
  activities.
• 192.243, Nondestructive testing
• B31.4 allows 40 weld inspection in Location
  Class 3 and 75 in Location Class 4. DOT
  requires 100 or at least 90 if impractical.

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Engineering Exceptions-Gas

• Subpart G, General Construction Requirements for
  Transmission Lines and Mains
• 192.315, Wrinkle Bends in steel pipe.
• Wrinkle bends are allowed on steel pipe operating
  at a pressure that produces a hoop stress of less
  than 30 SMYS.
• Wrinkle bends are prohibited on ABC pipelines.

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Engineering Exceptions-Gas

• Subpart J, Test Requirements
• 192.505 192.619
• For Location Class 3 which includes all ABC gas
  transmission pipelines, DOT requires a test
  pressure equal to 1.5 times the maximum operating
  pressure.
• ASME/ANSI B31.8 requires a test pressure equal to
  1.4 times the maximum operating pressure.