API RP 14C:2001(2007) pdf download
API RP 14C:2001(2007) pdf download.Recommended Practice for Analysis, Design, Installation, and Testing of Basic Surface Safety Systems for Offshore Production Platforms.
4.2.4.2 ElectrIcal Codes and Recommended Practices
Protection from ignition by electrical sources should be provided by designing and maintaining electrical equipment in accordance with API Recommended Practice 14F or other applicable standards, and by classification of platform areas according to API Recommended Practice 500.
a. API Recommended Practice I 4F defines criteria for dcctncal equipment and wiring methods that can be used safely in classified and unclassified areas on offshore production platforms.
h. API Recommended Practice 5(X) presents methods for classifying areas surrounding drilling rigs and production facilities on land and on marine fixed and mobile platforms for safe installation of electrical equipment.
4.2.4.3 Location
Potential ignition sources, such as fired process components and ceflain rotating machinemy. are normally equipped to minimize the possihiliy of igniting released hydrocarbons. Additional protection can be provided by locating equipment in areas where exposure to inadvertently released hydrocarbons is minimized. API Recommended Practice 14J provides guidance 11r locating equipment. Some other potential ignition sources are those related to housekeeping such as boilers, water heaters, stoves, clothes dryers. etc. These should be located in electrically unclassified areas. If such equipment is gas fueled and installed in an inadequately ventilated building. a combustible gas detector (ASH) should be installed to close fuel shutdown valves located outside the building.
4.2.4.4 Hot Surface Protection
Any surfiice with a temperature in excess of 400’F (204’C) should be protected from exposure to hydrocarbon liquids due to spillage or leakage. Surfaces with a temperature in excess of 725’F i385C) approximately 0 percent o the ignition temperature of natural gas) should be protected from exposure to accumulations of combustible gases and vapors. Methods of protection can be insulation, barricrs. water cooling. etc. However, if such surfaces on permanent or portable equipment are in an area classified by API Recommended Practice 5(X). they should be insulated. Some mechanical components such as turbochargers, exhaust rnaniMds and the like (including associated piping) that cannot be insulated without causing mechanical failure should be protected by other means.
4.2.5 Hot Equipment Shielding
Any surface with a temperature in excess of 16(YF (7lC) should have protection when accidental contact of the hot surface could be made by personnel within normal work or walk areas. Protect ion may be in the form of guards, harriers, or insulation. Some mechanical components such as turbochargers. exhaust manifolds. conipressor heads, expansion bonles. and the like (including associated piping) are exceptions: in these cases, warning signs are acceptable.
4.2.6 Emergency Support Systems (ESS)
The Emergency Support Systems (discussed in detail in Appendix C) minimize the effects of escaped hydrocarbons on offshore production platforms. The ESS includes:
a. The combustible gas detection system to sense the presence of escaped hydrocarbons and initiate alarms and platform shutdown before gas concentrations reach the LEL.
b. The containment system to collect escaped liquid hydrocarbons and initiate platform shutdown.
c, The tire ioop system to sense the heat of a fire and initiate platform shutdown.
d. Other fire detection devices flame. thermal, and smoke) that are used to enhance fire detection capability.
e. The Emergency Shutdown System to provide a method to manually initiate platform shutdown by personnel observing abnormal conditions or undesirable events.
f. The SSSVS that may be self actuated (SSCSV) or activated by an FSD system and/or a fire loop (SCSSV).
4.2.7 Other Support Systems
The integrity of a platfonn surface safety system depends on proper operation of several other support systems. These ancillary support systems carry the same degree of importance as other portions of the platform safety system and should he equally as well maintained. Those discussed in Appendix C are the pneumatic supply system and systems for discharging gas to the atmosphere.
