B31.1 Power Piping

The Allowable Stress Values di power piping sama seperti di power boilers.

This Code is more conservative than some other piping codes,untuk long service life and maximum reliability.

"konservatif : kolot, tidak ada perubahan karena kuatir berdampak buruk, sangat melindungi dari kerusakan atau kerugian"

B31.1 Power Piping: piping typically found in electric power generating stations, in industrial and institutional plants, geothermal heating systems, and central and district heating and cooling systems.

Table 126.1 Specifications and Standards (Piping component manufactured)

Para 136 

Inspection, Examination, and Testing

Para 100.1.2

They include but are not limited to steam, water, oil, gas, and air services.

(A) This Code covers boiler external piping (BEP) which: steam or vapor is generated at a pressure of more than 15 psig [100 kPa (gage)]; and high temperature water is generated at pressures exceeding 160 psig [1 103 kPa (gage)] and/or temperatures exceeding 250°F (120°C)

garis merah : B31.1
garis hitam : Boiler Proper (ASME BPVC Section I Preamble)
garis putus : Nonboiler External Piping and Joint (NBEP) B31

(B) Nonboiler external piping (NBEP) includes all the piping covered by this Code except for that portion defined above as boiler external piping

Para 100.1.3 

This Code does not apply to the following:
(A) economizers, heaters, pressure vessels, and components covered by Sections of the ASME Boiler and Pressure Vessel Code
(B) building heating and distribution steam and condensate piping designed for 15 psig [100 kPa (gage)] or
less, or hot water heating systems designed for 30 psig [200 kPa (gage)] or less
(C) piping for hydraulic or pneumatic tools and their components downstream of the first block or stop valve
off the system distribution header

(D) piping for marine or other installations under Federal control
(E) towers, building frames, tanks, mechanical equipment, instruments, and foundations

Para 102.3 Allowable Stress Value and Other Stress Limits for Piping Component

Para 102.3.1
Allowable Stress Value
- in Appendix A
- Allowable stress value in shear shall not exceed 80% of the values in Appendix A
- Allowable stress in bearing shall not exceed 160% of determined values.
- Basis ASV dalam code ini sama seperti ASME Boiler and Pressure Vessel Code, Section II Part 1 Appendix 1 (kecuali ASV untuk cast iron dan ductile iron sama dgn Section VIII, Division 1, Appendix P Table UCI-23 adn UCD-23)

Para 102.3.2
Limits for Sustained and Displacement Stresses
(A) Sustained Stresses

(A.1) Internal Pressure Stress
Thickness