It can still be a useful tool if it is a little dated. This is a common examination question. Not exposed to some other corrosive internal environment Vessels that are not in continuous service and are not blanked and purged should be treated as normal continuous service vessels as above. The total area of the pits that are deep enough to eat into trequired do not exceed 7 in2 in any circle that is 8 in in diameter. There are two main issues here: pressure testing and nameplates.
Appendix A b6 gives an overall pressure temperature Figure 2. All three of the sections have been added to, rearranged and changed in emphasis with each new edition of the code. Now try the familiarization questions in section 5. This book contains information obtained from authentic and highly regarded sources. In such a situation you can expect opinion to predominate. Watch out for exam questions about the code edition to which a re-rating is carried out. You just have to be careful not to exceed the calculated test pressure during the test.
As a matter of principle, the primary objective is to re-rate a vessel to the latest edition of the code to which it was built see Fig. Alternatively, it is acceptable to add additional stamping. There is a focus and a logical order, of sorts, but this is surrounded by a mass of additional information contained in rather dense paragraphs of text. The other relevant area to look at is Fig. European codes are more likely to call it design pressure.
The technical areas that they address corrosion, equip- ment lifetimes, etc. An overriding principle is that any vessel subject to an Figure 5. Appendix A b7 covers hot water storage tanks. It continually refers to the possibility of replacing internal inspections of vessels with on-stream inspections. Watch out for this as an exam question. Most of the chapters can stand alone as summaries of individual codes, with the exception of the mock examination questions that contain cumulative content from all of the previous chapters.
Note also how adding some types of nozzle connections may not be classed as an alteration. For vessels not in continuous service that are blanked and purged so that no corrosion takes place, the inspection interval can be taken as a 10-year service life, but you have to be sure that the vessel is:. The thrust of the idea is that it is thinning below the trequired thickness that threatens integrity. Note the list of aspects to take into account when considering insulation removal:. .
The consent of Woodhead Publishing Limited does not extend to copying for general distribution, for promotion, for creating new works, or for resale. What should the inspector do? We specialize in in-company courses, tailored to the needs of individual clients. Half the estimated remaining life Figure 4. There is nothing particularly new about the list of requirements of this listed as section 4. Two areas where this is an issue are:. This is laid out broadly as shown in Fig. To accomplish this, further information and guidance has to be drawn from other codes.
The contents of the vessel are not lethal. Either must be witnessed by the inspector to make the re-rating valid. This makes sense, as they are intended to be used as technical information documents rather than strict codes, as such. They are perhaps far from perfect but, in reality, are much more comprehensive and technically consistent than many Figure 1. I didn't have a class before my test, but with this book and the great way you spell things out, I was absolutely comfortable through the exam and I felt I did well. Which of these is a viable option for an inspector who cannot insist that external lagging is removed? Austenitic stainless steels: 140 8F to 400 8F Note that these are for systems that operate at a constant temperature. This document is not in Figure 3.
Note the following points about these sections:. I didn't take a class for my 510 exam. On-line training courses available Matthews Engineering Training Ltd provides training in pressure equipment and inspection-related subjects, and the implementation of published codes and standards. As with any other written form of words, codes are open to interpretation. If, as for most vessels, circumferential hoop stresses are the governing factor, then thickness readings will be averaged along the longitudinal direction look at the statements in section 7.