Instrument Enclosures

IPE Engineering Practice IPE-EP-12-1-3

Document number: IPE-EP-12-1-3 · Section: 12 — Instruments and Controls

SCOPE

This Practice covers detailed requirements for instrument enclosures.
Any deviation from this Practice shall be approved by the procedure described in EP 1–1–3.
An asterisk (*) indicates that a decision by the Owner or the Owner’s Engineer is required or that additional information is furnished by the Purchaser.
A revision bar indicates all changes made to this Revision.

2.0 REFERENCES

The following codes and standards shall be considered as part of this Practice. All documents shall be the latest editions in force on the date of issuance of this Practice.

STANDARDS AND PUBLICATIONS

DEFINITIONS

Owner – Inflection Point Engineering, LLC.
Owner’s Engineer – A Inflection Point Engineering, LLC appointed engineer.
Purchaser - The party placing a direct purchase order. The Purchaser is the Owner’s designated representative.

GENERAL

Hard instrument enclosures shall be made of polyurethane or glass reinforced polyester.
Soft instrument enclosures shall be made of Silicone coated glass fabric or teflon coated glass fabric. The soft instrument enclosures may be secured to the equipment by bands, velcro fasteners, or laced wire. Soft enclosures should not be used where low ambient temperature is below –10oF.
All hard enclosures fasteners and fittings, such as hinges, propstays, toggle latches, nuts, washers and set screws, shall be manufactured from hot dipped galvanized, flamed spry metalized, or stainless steel.
All hard enclosures shall have a neoprene sealing strip along the entire circumference between the lid and the body of the enclosure.
The instrument enclosure shall include appropriate mounting brackets to allow for specified 2 inch pipe mounting, flange mounting, or specified pipe size for inline devices. All mounting hardware, excluding U–bolts, shall be hot dipped galvanized, flame spray metalized, or stainless steel.

Where specified on the Data Sheet (EP 12–1–3 DS), the instrument enclosure shall be provided with a steam or electric heater. The heater shall be sized to insure freeze protection and temperature maintenance. The heaters shall not allow internal enclosure temperature to exceed 160 oF. Heaters and thermostats shall fail in the off position.
The electric heater, junction box, and fittings shall be FM/UL certified for installation in a NEC Class 1, Group D, Division 1 area.
(*) When specified on the Data Sheet a thermostatic temperature control valve shall be provided for the steam heater. The vendor of the temperature control valve and valve materials shall be approved by the Owners Engineer. The trap body shall have a design pressure/temperature rating at least equivalent to the design conditions of the inlet piping. The minimum acceptable rating shall be 150 psig and 450oF.

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