Seeking standards for integral forged stop valves
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Model: J41Y-16P, diameter DN25, fully forged. 1. Can the acceptance standards be based on GB/T12235-07? The manufacturer says that JB/T7746 should be followed. 2. Are all globe valves manufactured with a reduced diameter, or is it possible to have ones with a full bore?
1. A forged globe valve generally refers to a reduced-diameter forged steel globe valve, in accordance with JB/T 7746； 2. If compliance with GB/T 12235 is required, it is necessary to indicate whether necking is permitted ； 3. It can achieve full bore in accordance with GB/T 12235, and such products are available on the market.
API602 forged steel valves come in full-bore sizes.
Gate valves all have a reduced diameter, which is related to their working principle. The closing element of a gate valve is elliptical or conical in shape, and it cannot allow fluid to pass through; if it were designed to permit such passage, it would be a globe valve. The acceptance standards can be based on JB/T7746； It can also be carried out in accordance with GB/T12235-07, as GB/T12235-07 references JB standards
If acceptance is based on standard 12235, then the valve seat passage, valve stem diameter, and wall thickness all fail to meet the requirements, as the specifications for 12235 are higher than those of 7746