When it comes to EU pressure equipment regulations, the stack of books is thicker than the complete works of Jin Yong, and there are many things to do. Where do you start? Recently, I have often been asked about the traceability of PED materials, which is the key and difficult point of knocking on the blackboard.

    For the study of laws and regulations, English reading and comprehension is very important. Let's start with the following beautiful articles.

EU Pressure Equipment Safety Directive 2014/68/EU Appendix 1-Essential Safety Requirements, section 3.1.5 of the manufacturing part, the original text is as follows:

    3.1.5 Traceability

    Suitable procedures must be established and maintained for identifying the material making up the components of the equipment which contribute to pressure resistance by suitable means from receipt, through production, up to the final test of the manufactured pressure equipment.

    In one sentence, it describes all the content of the material traceability.

    The Queen of England said that there is no British or American, only correct English and wrong English. Let us analyze this correct English.

    Regulations and standards, the passive voice is the mainstream. The protagonist, Suitable Procedures, is literally translated as a suitable procedure. How can it be considered suitable? After explaining the full text, you will know.

    What happened to the program? Must be established and maintained, It has to be done, the program has to be established and maintained.

    What's the procedure? Identifying the material, the process of identifying the material.

    Why mark materials? See paragraph heading 3.1.5 Traceability, material traceability requirements.

    Material, what material? Material making up the components of the equipment, the materials constituting the equipment (of course pressure equipment) parts

    There are too many parts, what parts? Which contribute to pressure resistance, constitute the components under pressure, and only manage the pressure.

    Next, how to identify? By suitable means, another "appropriate" method, there is no limit, just suitable.

    When is the material identification done? From receipt, through production, up to the final test of the manufactured pressure equipment.

    Splitting the explanation to this point, do you think this passage is very sharp? Do you think that the English dialogue in European and American blockbusters is punctuation?

    Is the work done here? Too young too simple! Tell you to build a house, the job starts with burning bricks.

    To Establish a procedure, of course, it must contain details. What must be described is the composition of this material identification system. "Identification" is actually a "coding" system, for example, EP19003, the coding system E-Europe, EU product, P-plate, is the plate not the tube, the material arriving in 2019, 003, third The serial number of the inspection lot. The coding guidelines are determined by yourself, As long as it is Suitable.

    Since it is the traceability of materials, the code of a specific batch of materials must be unique. How to ensure the uniqueness of the code? The coding guidelines are determined by yourself, just as Suitable. This is the main function of the "003" serial number, Double O three, Double O four, ... until Double O Seven, Bond, Material Bond...

    By suitable means, use the "appropriate" method to mark the material. How is this job suitable? Focusing on the fundamentals, the purpose of material labeling is to maintain traceability, that is, the method that can smoothly maintain traceability is the appropriate method. Black cats and white cats, you choose by yourself, as long as you can solve the following series of problems.

1. Where is the identification mark? Where is the plate identification? Where is the pipe identification?
2. I have a hammer and you have a steel seal. Can you just hit the material directly? Is your steel stamp low stress?
3. Do you want to write with a marker? You have to sandblast the outer surface later, what should I do?
4. This box of gadgets is under pressure. I'm not a mini-sculptor, what should I do?
5. The manufacturing process requires assembly, welding, heat treatment, facial, and the logo will disappear. What should I do?
6. ……

    By suitable means, one word for you, my ten thousand books...

    Having said so much, I feel that the literal meaning is explained clearly. A deep experience is that this is just a drop in the essentials of the norm. Here is a question, traceability, what is it? Are you chasing Diaochan or Xishi? And wait for subsequent decomposition.

Take this PED essay as a citation. I hope that in the next time, I will sort out slowly and clarify the requirements of PED materials, and then there will be the American standard system for pressure equipment, the national standard system, and the design process, as well as welding, NDT...

    We hope to have the opportunity to communicate and share more knowledge and experience with all heroes in the field of heavy industry manufacturing.