| Date | July/August 1997 |
| Volume | 3 |
| Issue | 4 |
| Return to Journal Index | |
July/August 1997 Inspectioneering Journal Article Index
-
July/August 1997 Inspectioneering JournalBy Lynne Kaley at Trinity Bridge LLC / Trinity Bridge Digital, and Ricardo R. Valbuena at DNV Inc
Damage of carbon steel pressure vessels due to various in-service damage mechanisms continues to be a serious concern in the refining and petrochemical industries. A survey conducted in 1990 by the NACE T-8-16 Work Group to determine the nature and extent of cracking problems in wet H2S refinery environments showed that there was insufficient information reported about the type of cracking found to correlate cracking incidence with cracking mechanisms. Most of the inspections for cracking reported were detected during internal inspection using Wet Fluorescent Magnetic Particle Testing (WFMPT). As a result, it was concluded that in addition to the service related cracks reported, a number of "cracks" detected were the result of original fabrication, repair or alteration of the pressure vessels.
-
July/August 1997 Inspectioneering JournalBy Del Underwood at Det Norske Veritas
In a past issue, we discussed one solution to the instrument line block valve pendulum problem. This was where the valve assembly can be mounted remotely from the vibrating product line, such as at-grade. This issue covers two possibilities where the valves need to remain close to the vibrating line.
-
July/August 1997 Inspectioneering JournalBy Michael Twomey at CONAM Inspection Inc., and Jay N. Rothbart at Conam Inspection Inc.
Regulatory requirements such as OSHA 1910, industry codes and practices coupled with an international drive for more cost-effective preventative maintenance are leading the industry toward data information management systems to assist in organizing and prioritizing preventive maintenance strategies. This shift coincides with the movement toward a risk-based inspection approach to plant condition management. This approach ranks units or individual equipment according to criticality or risk, allowing inspection efforts to be focused where they can have the greatest effect in risk reduction. There are a number of points to bear in mind when planning to implement a plant condition management system.
