Do welding materials for pressure vessels have a shelf life requirement?
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May I ask what is the shelf life of welding materials used for containers, and where are the regulations specified?
There shouldn’t be an expiration date, right? When storing welding materials, we always make sure to maintain the proper humidity in the storage area (to prevent the materials from getting damp or rusty), and there are no requirements regarding the storage date for these materials.
Regarding the storage of welding materials, refer to their packaging, which contains specific requirements and instructions.
Of course it has an expiration date; there are oxidizers on the welding rod
What was found: It is specified in JB/T3223-1996 (8.3): 1) The period recommended by the quality certificate or instructions for welding materials; 2) Two years for acidic welding materials and low-hydrogen welding materials that are properly packaged to prevent moisture absorption; 3) One year for graphite-type welding materials and other types of welding materials
Within the time periods recommended by JB/T3223-1996, acidic welding materials and low-hydrogen welding materials with properly sealed moisture-proof packaging have a shelf life of two years, while graphite welding materials and other types of welding materials have a shelf life of one year. This is just a general rule; if the welding material storage area can maintain a constant temperature and humidity, and the materials are still qualified after passing inspection despite being slightly past their warranty period, they should be usable.
Hehe, this is the first time I’ve heard of it
Within the time periods recommended by JB/T3223-1996, acidic welding materials and low-hydrogen welding materials with properly sealed moisture-proof packaging have a shelf life of two years, while graphite welding materials and other types of welding materials have a shelf life of one year. This is just a general rule; if the welding material storage area can maintain a constant temperature and humidity, and the materials are still qualified after passing inspection despite being slightly past their warranty period, they should be usable.
If vacuum packaging is used, there is no expiration date, and it does not require drying – it can be used right away. Welding rods are vacuum-packed in iron cans, while welding wires are vacuum-packed in aluminum foil.
Thank you. I noticed that the quality certificates we receive generally don’t specify an expiration date, and when I called the manufacturer, they also said there was none.
Within the time periods recommended by JB/T3223-1996, acidic welding materials and low-hydrogen welding materials with properly sealed moisture-proof packaging have a shelf life of two years, while graphite welding materials and other types of welding materials have a shelf life of one year. However, welding materials must pass inspection before use; in particular, those used for container manufacturing need to be dried and kept at a constant temperature.
New JBT3223-2017: The valid period is the usage period recommended in the quality certificate or instruction manual for welding materials; in the absence of such recommendations, electrodes, flux-cored wires, fluxes, etc., generally should not exceed 5 years. There are other explanations.