IEEE 515-2011 pdf free.IEEE Standard for the Testing, Design,Installation, and Maintenance of Electrical Resistance Trace Heating for Industrial Applications.
IEEE 515 provides requirements for the testing. design. installation, and maintenance of electrical resistance trace heating in general industries as applied to pipelines, vessels, pretraced and thermally insulated instrument tubing and piping, and mechanical equipment. The electrical resistance trace heating is in the form of series trace heaters, parallel trace heaters, and surface heating units. In this standard, the terms hazardous (c!Lcsfied locations and poteniiallv flainrnahk atmospheres refer to the same conditions. The requirements also include test criteria to determine the suitability of these heating devices utilized in industrial applications as applied in unclassified (ordinary) and hazardous (classified) locations.
1.2 Purpose
The provisions of this standard should ensure that process, fluid, or material temperatures are maintained and provide electrical, thermal, and mechanical durability to the trace heating system, such that in normal use, its performance is reliable and poses no danger to the user or surroundings. This standard is to scrve as a complementary document to the current version of those national and international standards addressing electrical resistance trace heating.
The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.
For the purposes of this document, the following terms and definitions apply. The IEEE Standards Dictionary: Glossary of Terms & De/initions4 should be consulted for terms not defined in this clause.
ambient teniperature: The temperature surrounding the object under consideration. Where an electrical heating device is enclosed in thermal insulation. thc ambient temperature is the temperature exterior to the thermal insulation.
braid: Interwoven metallic covering or other equivalent electrically conductive material surrounding the trace heater.
certifying agency: Organization that validates that equipment meets tests and standards.
cold lead: An electrically insulated conductor used to connect a heating conductor to the branch-circuit conductors and designed so as not to produce appreciable heat.
connections: Terminations and splices used to attach a heating device to power wiring or to connect sections of devices.IEEE 515 pdf free download.