Open reinforcement
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One of the openings is on a heater (in an acidic medium, at a temperature of 140°C). One of these openings has a diameter of DN200; for reinforcement, a steel plate about 50 MM thick is welded to the heat exchanger, with a reinforcement area of approximately 1 square meter. The other opening has a diameter of around 20 MM; reinforcement is achieved using welding material, though the specific type of material is not known. The reinforcement layer is about 10 MM thick. There is a small opening with a diameter of 5 MM on the welding material used for reinforcement, presumably to account for thermal expansion. Isn’t it necessary to provide a similar small opening on the steel plate used for reinforcement of the larger opening, in order to accommodate thermal expansion and contraction? Please advise. This post was last edited by lanxueyouhun on 2008-1-22 at 10:10
Questions should be clear and specific; it’s best to include photos of the actual items: handshake
Why not open it a little? This small hole must be made; it is also known as a leak detection hole or an exhaust hole.
It’s probably not meant to prevent thermal expansion and contraction. It’s not clear what is meant by strengthening with welding materials – is it surfacing welding for reinforcement? It is acceptable to use holes in steel plates as reinforcement rings for inspection purposes, but when holes are made in the welding materials used for reinforcement, can leaks still be detected during pressure tests?
It seems to be the access points for finding bargains and exhaust vents mentioned on the 3rd floor. By \"welding material reinforcement,\" I mean reinforcement using welding methods, as opposed to using steel plates; I’m not sure whether it involves fusion welding, pressure welding, etc., which is why I said that. The steel plates used for reinforcement, as mentioned on the 3rd floor, should also have small openings. I didn’t notice any such openings last time, which is why I have this doubt; I’ll go and check it when I have time. Thank you
Reinforcement rings all require M10 screw holes; the specific form of reinforcement using welding materials is not clear. The screw holes serve two purposes: one is to allow compressed air to be introduced in order to check the quality of the welds connecting the reinforcement rings, and the other is to act as leakage indication holes during the operation of the container. Therefore, when insulating the equipment, it is recommended to use short pipes to lead the screw holes out of the insulation layer. To correct that, screw holes are not used for leak detection during equipment pressure testing.
Indeed, there are no small openings in the 50MM thick reinforcement plate; this reinforcement plate is rectangular in shape and wrapped around the cylindrical heat exchanger. It doesn’t seem quite appropriate to call it a reinforcement ring.
Is the reinforcement plate that thick? Isn’t it specified in the standards that it should be less than 1.5 times the thickness? Seeking advice from experts