Regarding the issue of borrowing materials from entities without sales qualifications

It only mentions the lack of qualifications for selling such materials; but does the product itself come with a certificate of conformity or quality certification documents? Are there any relevant inspection and testing certificates? (The requirements for non-destructive testing of the inner tubes of vacuum pipes can be quite high.) Was it manufactured by a factory that meets the TSG requirements for pressure pipe manufacturing? As for dealing with those who lack experience, I believe the key principle is that quality must not be compromised; there should be a clear person responsible in case of quality issues, and products without any proper specifications should be avoided. Otherwise, the person in charge of the materials will bear the consequences...

Simply put, there is no such thing as a sales qualification. . For the procurement of raw materials for pressure equipment, important materials must be purchased from suppliers that have passed the evaluation. If it cannot be purchased from a qualified supplier, a one-time procurement request must be submitted to purchase it from a source outside the list of qualified suppliers. . As for the quality of these items purchased, it is required to meet the relevant standards. .

At the very least, a mechanical property test for sampling should be conducted, right? With time for testing, is it possible to buy the materials as well?

This post was last edited by mofei521 on 2015-8-3 22:42. Hello, teacher: 1. It’s equivalent to borrowing (i.e., purchasing) raw materials from another company; that company does not have the qualifications to sell raw materials, but it does have the qualifications to manufacture special equipment. The raw materials used are the same as those used by our company, and they can provide quality certificates issued by the raw material manufacturers. We’re currently concerned because that company lacks the qualifications to sell raw materials. 2. Is the outer tube (under negative pressure) of low-temperature vacuum insulation pipes like those used in our company considered a pressure-bearing component? Thank you.

I’m not worthy of being called a teacher; I’m here as well to exchange knowledge. Second question: Components that are subjected to both internal and external pressures are considered pressure-bearing elements. For the first question, my opinion is largely in line with that of the third floor; from a design perspective, the only thing that matters is whether the product quality is satisfactory and whether it was manufactured by a factory that meets the required standards. If these conditions are met, then there should be no problems. But obviously, your perspective is different from ours. From a business perspective, it’s hard to say whether such a purchase is reasonable; there might be issues with the drafting of the contract. I really can’t offer any advice on this matter. I suddenly thought of a question: Classmate Dafu, when there’s a problem with the inner tube, the function of the low-temperature vacuum jacket is immediately affected. Moreover, repairing or replacing it is just as troublesome as with ordinary jacket tubes. So it shouldn’t be the case that the issue with the inner tube is minor; rather, very high standards are required, right? @Chow Tai Fook

That makes sense; since the outer tube is vacuum-sealed, the inner tube also needs to meet high standards. Our regular jacketed tubes aren’t as complicated as this. To be honest, as soon as I heard his description, I thought of vacuum thermos flasks and wondered how to deal with that. . . :lol