Log in

Login to your account

Username *
Password *
Remember Me

Becht Engineering Blog

In this section of the site contributing authors submit interesting articles relating to the various services, industries and research & development efforts of Becht Engineering.

Risk Assessment of Refinery Hydroprocessing Unit Reactor Effluent Air Coolers (REACs) Made of Duplex Stainless Steel (DSS)

REACsDSS-cover_im_20180910-210921_1
Cracking of REAC Duplex Stainless Steel Failures of Refinery Hydroprocessing Unit REACs made of 2205 DSS have in some cases resulted in significant plant damage and extended outages for repairs.  In a few  cases, header box welds have ruptured.  Additionally, failures have occurred at tube-to-tubesheet welds and in REAC inlet and outlet piping made of DSS.  A sufficient number of failures have been reported that the API Subcommittee on Corrosion and Materials has initiated a program to survey the refining industry to understand how wide spread the issue is and to better identify factors leading to cracking.  Additionally, some process licensors have notified their customers of potential concerns and have suggested they undertake risk assessments of their DSS REACs.  In early 2016, the Materials Technology Institute (MTI) issued a publication “Fabrication of 2205 Duplex Stainless Steel REACs in Refinery Hydroprocessing Units” that reviewed case histories of failures and provided guidance...
Continue reading
3
  951 Hits
  0 Comments
951 Hits
0 Comments

A Dimensional Execution Plan - Measure Up To Project Expectations

becht_dimensional_technology_services
Plan the Work and Work the Plan I am confident that we can agree that it is essential for all projects to have an execution plan to be successful. We have all heard the common phrase, “Plan the Work and Work the Plan.” Many have been participants in strategy meetings discussing the most effective and efficient means to execute a plan on capital project work. So why does it seem that in today’s age of revolutionary technology we seem to be unable to execute a project effectively, efficiently, and without mistakes that cause re-work? In the past few years, most people I know have been involved with, and witnessed projects that failed to finish on time/on budget with mistakes that abound. After working with and servicing the Engineering, Procurement, and Construction (EPC) business for over 38 years, I have experienced well executed projects and poorly executed projects. Although there can...
Continue reading
1
  150 Hits
  0 Comments
150 Hits
0 Comments

Treat Reliability Like …

reliability-is-lik_20180904-151558_1
This blog outlines ways to think about reliability to help drive a culture of continuous improvement.  It is the fourth in a series of Blogs on improving plant reliability performance through changes in culture, programs, equipment design, maintenance and operation. The principles we applied in implementing successful reliability programs in a number of operating plants included the following: Treat Reliability like Safety Treat Reliability like Football Treat Reliability like Athletics Treat Reliability like Fumigation Treat Reliability like Hard, Dirty Work Treat Reliability Like Safety In most operating plants, there is a reasonable safety culture and program. This is driven by regulatory requirements and also a desire to have a safe, injury free workplace. The safety program includes management reporting at a high level in the plant structure, a well written manual describing hazards and procedures, tests and inspections to be done prior to executing work, a well-defined incident investigation process...
Continue reading
1
  200 Hits
  0 Comments
200 Hits
0 Comments

Using NB-3200 FEA As An Option To Stress Equations In NB-3600

NB-3200_FE_20180823-153346_1
  The ASME B&PV Section III Div.1 Code 2013 Edition is currently approved in 10CFR50.55(a). The 2013 edition, permits elastic FEA per NB-3200 in place of the stress equations of NB-3600, as follows: For pressure design -  “NB-3611.2 Acceptability When Stresses Exceed Stress Limits. When the stresses as determined by the methods given in NB-3630 exceed the limits thereof, the design can be accepted, provided it meets the requirements of NB-3200.” For shakedown check Eq. (10)(12)(13) - For the shakedown check, quoting from NB- NB-3653.1 Satisfaction ofFor shakedown check Eq. (10)(12)(13) - For the shakedown check, quoting from NB- NB-3653.1 Satisfaction ofPrimary Plus Secondary Stress Intensity Range. “(b) If for one or more pairs of load sets eq. (a)(10) is not met, thepiping product may still be satisfactory, provided that the conditions of NB-3653.6 are met or provided that therequirements of NB-3200 are satisfied.”   Equations (10), (12) and (13),...
Continue reading
4
  350 Hits
  0 Comments
350 Hits
0 Comments