ASME B1.20.3 PDF
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Dryseal Pipe Threads Inch
Description
ASME B1.20.3 specifies thread form, class, allowance, tolerance & designation for Dryseal threads.
Dryseal pipe threads based usa (american) thread, however, differ thread designed seal pressure-tight joints without necessity using sealing compounds. accomplish modification greater accuracy manufacture required. roots external internal truncated slightly crests, i.e. wider flats crest, metal-to-metal contact occurs crests coincident prior flank contact, see figure 1. thus assembled wrenching, crush sharper mating threads. this action major minor diameters tends prevent spiral leakage makes pressure tight compounds, provided accordance standard specifications tolerances not damaged galling assembly. control crest root truncation simplified use properly threading tools. also, desirable full height l1 length. functionally objectionable, compatible lubricant sealant may used minimize possibility galling. assembling refrigeration systems effect seal.
Please select a variation to view its description.
Please select a variation to view its description.
