By American Petrolium Engineering

Show description

Read or Download API RP 502, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone O, Zone 1, and Zone 2 PDF

Similar petroleum books

Proterozoic East Gondwana: Supercontinent Assembly and Breakup

This quantity as a complete specializes in overdue Mesoproterozoic to early Cambrian occasions relating to Gondwanaland meeting. the nineteen papers supply a finished evaluate together with complex wisdom and new facts from all severe components of east Gondwanaland. the hot wisdom of the evolution of East Gondwana which was once considered as an essential component of Mesoproterozoic super-continent Rodinia is the key subject matter of the quantity, that is bolstered through highlighting this radical and new realizing of the evolution of East Gondwana.

Formulas and Calculations for Drilling, Production and Workover. All the Formulas You need to Solve Drilling and Production Problems

The authors assertion that, 'this convenient publication offers all of the formations and calculations you will definitely want drilling operations' is justified because of the completeness and straightforward use of the data. .. .The complete layout has essentially been made with the person in brain. .. (Applied Mechanics experiences, Vol.

Construction Contracts - How to Manage Contracts and Control Disputes in a Volatile Industry

During this significant new quantity, Edward Whitticks has charted the direction for a person operating with contracts and dispute keep watch over in oil and gasoline, probably the most unstable industries on this planet. His functional, common strategy will circulation you step-by-step during the strategy of contractual negotiations, bids and closeouts.

Extra resources for API RP 502, Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone O, Zone 1, and Zone 2

Sample text

2 Petroleum handling equipment does not fail frequently. Furthermore, the NEC requirements for electrical installations in Zone 2 locations allow that a source of ignition may occur in the event of an electrical equipment failure. This also does not happen frequently. For example, assume that the electrical and petroleum handling equipment each fail at the rate of once every 8,OOO hours (once per year). The probability that both types of equipment will fail during the same hour is only one in 64 million.

An adequate number of sensors is installed to ensure the sensing of flammable gas or vapor in the building (or similar area) in all areas where such gas might accumulate; g. user-provided systems bypassing the disconnecting or other “corrective action” devices (but not audible or visual alarm devices) to allow calibration and maintenance are permitted, provided the bypass system is utilized only during calibration or maintenance operations, and only while the area is manned by personnel who are qualified to take corrective action should there be a malfunction in process, storage, transfer, or similar equipment that potentially might release flammable gas or vapor into the area.

Building ridge vents, taining vents from instruments and control devices utilizing flammable gas for control are classified as shown in Figure 15. building roof vents, and atmospheric tank vents) venting from a Zone O area are classified in a manner similar to that shown in Figure 16, except they should be surrounded by a Zone O classificationfor a distance of 50 cm (18 in). 5 m ( 5 ft). 2 Enclosed areas containing vents from instruments and control devices utilizing flammable gas for control are classified Zone O to the extent of the enclosed area.

Download PDF sample

Rated 4.76 of 5 – based on 18 votes