REINFORCEMENT OF SINGLE OPENINGS*
ASME B31.8
(GAS TRANSPORTATION)
(REINFORCING PAD OF BRANCH CONNECTIONS)

  With this method, you may design
  · Reinforcement required for branch connections.

  This method covers the design of reinforcement for branch connections of gas pipelines for gas transmissions and   distributions systems.

  You may also obtain :

• Wall Thicknesses required (Header and Branch)
• Area of Reinforcement required
• Area of Reinforcement available
• Cross-sectional area of various welds available for reinforcement
• Cross-sectional area of material added as reinforcement
• Total Area Available
• Size of reinforcing pad (if required)
• Size of fillet welds (Outside and reinforcing pad fillet-if required)

  Furthermore you will be able to:

  · Check your existing branch connections for different conditions .
  · Check your reinforcement of openings design modifying some one of the parameters as follows:

· Design Pressure (internal).
· Design Temperature.
· Thicknesses (Header and Branch).
· Diameters (Header and Branch).
· Material Specification : Header, Branch.
· Reinforcing Pad Material.
· Corrosion Allowance (Header and Branch).

NOTE: Temperature up to 450°F.

LOCATION CLASSES FOR DESIGN AND CONSTRUCTION

  (1) Location Class 1. A Location Class 1 is any 1 mile section that has 10 or fewer buildings intended for human occupancy.   A Location Class 1 is intended to reflect areas such as wasteland, deserts, mountains, grazing land, farmland, and   sparsely populated areas.
    (a) Class 1 Division 1. A Location Class 1 where the design factor of the pipe is greater than 0.72 but equal to or less   than 0.80, and which has been hydrostatically tested to 1.25 times the maximum operating pressure.
    (b) Class 1 Division 2. A Location Class 1 where the design factor of the pipe is equal to or less than 0.72, and which has   been tested to 1.1 times the maximum operating pressure.

  (2) Location Class 2. A Location Class 2 is any 1 mile section that has more than 10 but fewer than 46 buildings intended   for human occupancy. A Location Class 2 is intended to reflect areas where the degree of population is intermediate   between Location Class 1 and Location Class 3 such as fringe areas around cities and towns, industrial areas, ranch or   country estates, etc.

  (3) Location Class 3. A Location Class 3 is any 1 mile section that has 46 or more buildings intended for human occupancy   except when a Location Class 4 prevails. A Location Class 3 is intended to reflect areas such a suburban housing   developments, shopping centers, residential areas, industrial areas, and other populated areas not meeting Location   Class 4 requirements.

  (4) Location Class 4. A Location Class 4 includes areas where multistory buildings are prevalent, and where traffic is heavy   or dense and where there may be numerous other utilities underground. Multistory means 4 or more floors above ground   including the first or ground floor. The depth of basements or number of basement floors is immaterial.

EXIT DATA SHEET IS AS FOLLOWS :

INPUT FOR CALCULATION METHOD
REINFORCEMENT OF SINGLE OPENINGS*
(REINFORCING PAD OF BRANCH CONNECTIONS)

By :
Company :
Date :		01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
Client :
Reference :		Case :
Internal Design Gage Pressure :		UNITS Rating psi bar kPa
Design Temperature :		° F C K R
Location Class :		Location Class 1, Division 1 Location Class 1, Division 2 Location Class 2 Location Class 3 Location Class 4
Additional Facility :		* None * * Pipelines, mains and service lines * * Crossing of roads, rail roads without casing : * a. Private roads b. Unimproved public roads c. Roads, highways, or public streets, with hard surface and railroads * Crossings of roads, railroads with casing : * a. Private roads. b. Unimproved public roads. c. Roads, highways, or public streets, with hard surface and railroads. * Parallel encroachment of pipelines and mains on roads and railroads * a. Private roads.. b. Unimproved public roads.. c. Roads, highways, or public streets, with hard surface and railroads.. * Fabricated assemblies * * Pipelines on bridges * * Compressor station piping * * Near concentration of people in Location Classes 1 and 2 *
Header features
Outside diameter of Header (Od1):		in ft mm
Header Thickness (Th):		in ft mm
Header Material Specification :		** SEAMLESS ** API 5L Gr. A25 API 5L Gr. A API 5L Gr. B API 5L Gr. X42 API 5L Gr. X46 API 5L Gr. X52 API 5L Gr. X56 API 5L Gr. X60 API 5L Gr. X65 API 5L Gr. X70 API 5L Gr. X80 ASTM A 53 Gr. A ASTM A 53 Gr. B ASTM A 106 Gr. A ASTM A 106 Gr. B ASTM A 106 Gr. C ASTM A 333 Gr. 1 ASTM A 333 Gr. 3 ASTM A 333 Gr. 4 ASTM A 333 Gr. 6 ASTM A 333 Gr. 7 ASTM A 333 Gr. 8 ASTM A 333 Gr. 9 ** FURNACE BUTT WELDED ** API 5L Gr. A25.. ASTM A 53 Type F ** ELECTRIC RESISTANCE WELDED ** API 5L-Gr. A25 API 5L-Gr. A ASTM A 53-Gr. A API 5L-Gr. B API 5L-Gr. X42 API 5L-Gr. X46 API 5L-Gr. X52 API 5L-Gr. X56 API 5L-Gr. X60 API 5L-Gr. X65 API 5L-Gr. X70 API 5L-Gr. X80 ASTM A 53-Gr. A ASTM A 53-Gr. B ASTM A 135-Gr. A ASTM A 135-Gr. B ASTM A 333-Gr. 1 ASTM A 333-Gr. 3 ASTM A 333-Gr. 6 ASTM A 333-Gr. 7 ASTM A 333-Gr. 8 ASTM A 333-Gr. 9 ** DOUBLE SUBMERGED-ARC WELDED ** API 5L Gr. A. API 5L Gr. B. API 5L Gr. X42. API 5L Gr. X46. API 5L Gr. X52. API 5L Gr. X56. API 5L Gr. X60. API 5L Gr. X65. API 5L Gr. X70. API 5L Gr. X80. ASTM A 381 Class Y-35 ASTM A 381 Class Y-42 ASTM A 381 Class Y-46 ASTM A 381 Class Y-48 ASTM A 381 Class Y-50 ASTM A 381 Class Y-52 ASTM A 381 Class Y-56 ASTM A 381 Class Y-60 ASTM A 381 Class Y-65 ** ELECTRIC FUSION WELDED ** ASTM A 139 Gr. A ASTM A 139 Gr. B ASTM A 139 Gr. C ASTM A 139 Gr. D ASTM A 139 Gr. E
Header Corrosion Allowance :		in ft mm
Branch features
Outside diameter of Branch (Od2):		in ft mm
Branch Thickness (tb):		in ft mm
Branch Material Specification :		** SEAMLESS ** API 5L Gr. A25 API 5L Gr. A API 5L Gr. B API 5L Gr. X42 API 5L Gr. X46 API 5L Gr. X52 API 5L Gr. X56 API 5L Gr. X60 API 5L Gr. X65 API 5L Gr. X70 API 5L Gr. X80 ASTM A 53 Gr. A ASTM A 53 Gr. B ASTM A 106 Gr. A ASTM A 106 Gr. B ASTM A 106 Gr. C ASTM A 333 Gr. 1 ASTM A 333 Gr. 3 ASTM A 333 Gr. 4 ASTM A 333 Gr. 6 ASTM A 333 Gr. 7 ASTM A 333 Gr. 8 ASTM A 333 Gr. 9 ** FURNACE BUTT WELDED ** API 5L Gr. A25.. ASTM A 53 Type F ** ELECTRIC RESISTANCE WELDED ** API 5L-Gr. A25 API 5L-Gr. A ASTM A 53-Gr. A API 5L-Gr. B API 5L-Gr. X42 API 5L-Gr. X46 API 5L-Gr. X52 API 5L-Gr. X56 API 5L-Gr. X60 API 5L-Gr. X65 API 5L-Gr. X70 API 5L-Gr. X80 ASTM A 53-Gr. A ASTM A 53-Gr. B ASTM A 135-Gr. A ASTM A 135-Gr. B ASTM A 333-Gr. 1 ASTM A 333-Gr. 3 ASTM A 333-Gr. 6 ASTM A 333-Gr. 7 ASTM A 333-Gr. 8 ASTM A 333-Gr. 9 ** DOUBLE SUBMERGED-ARC WELDED ** API 5L Gr. A. API 5L Gr. B. API 5L Gr. X42. API 5L Gr. X46. API 5L Gr. X52. API 5L Gr. X56. API 5L Gr. X60. API 5L Gr. X65. API 5L Gr. X70. API 5L Gr. X80. ASTM A 381 Class Y-35 ASTM A 381 Class Y-42 ASTM A 381 Class Y-46 ASTM A 381 Class Y-48 ASTM A 381 Class Y-50 ASTM A 381 Class Y-52 ASTM A 381 Class Y-56 ASTM A 381 Class Y-60 ASTM A 381 Class Y-65 ** ELECTRIC FUSION WELDED ** ASTM A 139 Gr. A ASTM A 139 Gr. B ASTM A 139 Gr. C ASTM A 139 Gr. D ASTM A 139 Gr. E
Branch Corrosion Allowance :		in ft mm
Reinforcing pad features (if required)
Reinforcing pad material :		ASTM SA-285 Gr. C ASTM SA-515 Gr. 55 ASTM SA-515 Gr. 60 ASTM SA-515 Gr. 65 ASTM SA-515 Gr. 70 Other
If you choose other, please fill in the following blanks:
Other (Defined by user) Allowable Stress :
		psi

If you are sure press submit, if not refresh.

  * This method follows ASME Code for Pressure Piping, B31.8 Procedures (GAS TRANSPORTATION).