Engineering Stack

Blog Posts

Recommended sound pressure level for offshore facilities

Published on 18 Nov 2019 by ES Staff

Recommended sound (noise) pressure control level for offshore facilities according to industry standards.

Tags: sound noise

Unauthorized changes to alarm configuration should be checked as part of circuit maintenance

Published on 06 Nov 2019 by ES Staff

The need to provide a permanent record to document controller settings/configuration for programmable heating controllers in a manner that can be easily used. Lock-out of unauthorized changes needs to be assured, and configuration should be checked as part of circuit maintenance.

The need for ground leakage equipment protection and the need to have the controller switch

Published on 25 Oct 2019 by ES Staff

The lesson learned reveals that the arcing between the bus and the metallic braid across the Fluoropolymer jacket was sustained for some period of time. The fault current was sufficient to generate temperatures well above the temperature limit of the heating cable insulation but not sufficient to trip the circuit …

Why a Work Permit is needed for Hazardous Work to ensure safety for all involved

Published on 18 Oct 2019 by ES Staff

The Work Permit is designed to ensure full communication takes place between the area(s) involved, the owner of the affected equipment, and individual(s) performing the work so that hazardous work, and non hazardous work, is performed safely and efficiently.

Cold weather design of instrumentation and the need to perform regular preventive maintenance to prevent plant shutdown

Published on 14 Oct 2019 by ES Staff

Lessons learned of an industry loss study that determined that instruments in critical service should require routine maintenance and be provided with regular monitoring.

Working on or near exposed energized electrical equipment

Published on 10 Oct 2019 by ES Staff

The purpose of this document is to protect personnel when working on or near exposed energized electrical circuits and equipment. First and foremost, working on unguarded energized equipment is not permissible. However, situations may arise that require energized work

Siting or relocating temporary structures for use during construction or facility turnarounds

Published on 07 Oct 2019 by ES Staff

This bulletin is to include roles and steps to conduct the siting analysis, anticipated use and estimated occupancy levels, management review and approval, and retention of associated documentation. The document should address long-term installation of trailers during normal operations and short-term installations that may occur during major turnarounds or significant …

Overheating of pre-insulated instrument tubing and freeze protection lesson learned in supporting the use of ground-fault equipment protection

Published on 04 Oct 2019 by ES Staff

Overheating of pre-insulated instrument tubing exceeded the service temperature of the tracer materials (Polyolefin) which set up conditions for an arcing ground fault as the energized bus contacted the instrument tubing.

Materials Testing Machines Elements

Published on 23 Sep 2019 by ES Staff

Testing Machines typically used for the mechanical testing of materials usually contain the following elements: for gripping the specimen, for deforming it, and for measuring the load required in performing the deformation.

Ground-fault problems are not limited to self-limiting cables

Published on 12 Sep 2019 by ES Staff

The use of a ground-fault equipment protection device would detected the fault current in the early stages and tripped the circuit when there is problem with the system. It provides evidence that ground-fault problems are not limited to self-limiting cables.

Tags: ground-fault

Safe Practice of Removing Power to a Heater Circuit Whenever the Thermal Insulation is Removed

Published on 09 Sep 2019 by ES Staff

This lesson learned supports the safe practice of removing power to a heater circuit whenever the thermal insulation is removed.

FPSO Conversion Lessons Learned

Published on 03 Sep 2019 by Eric Yakawa

FPSO conversions! Either VLCC to FPSO, FPSO redeployment, or similar engineering works for life extension of naval surface vessels, this bulletin discusses the lessons learned encountered in such "brownfield" projects, with some experience on the issues.