ALEXANDRAHARPER
Structural
FLOATING THREADED BALL VALVES COULD MEET API-6D?
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THREADED BALL VALVES COULD MEET API-6D?
- Thread starter ALEXANDRAHARPER
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API 6D doesn't exclude threaded valves specifically but the text addresses flanged valves or weld-end valves without mentioning npt
The big loophole is on page 34 in paragraph 6.7.3 where the standard says:" Other end connections such as special flanges or mechanical joints may be specified by the purchaser"
The big loophole is on page 34 in paragraph 6.7.3 where the standard says:" Other end connections such as special flanges or mechanical joints may be specified by the purchaser"
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Other mentions of "threaded" in API 6D include 6.9 pertaining to bypass, drain and vent connetions and plug entries to be drilled and threaded; and the associated table 7.
Note that 6.1 and 7.1 reference ASME B16.34 (or an equivalent standard by agrement).
ASME B16.34 excludes threaded and socket weld valves larger than NPS 2 1/2.
Note that 6.1 and 7.1 reference ASME B16.34 (or an equivalent standard by agrement).
ASME B16.34 excludes threaded and socket weld valves larger than NPS 2 1/2.
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ALEXANDRAHARPER
Structural
are you sure that floating ball valves 1500/thd could meet API-6D?, A supplier of KF valves told me that only floating ball valves RF meet API-6D.
Im pretty confuse rightb now
Im pretty confuse rightb now
Avoid any confusion - don't specify threaded valves for process service as the first block. You can see that exceptions may exist in small sizes that accommodate vent and drain valves through 2 1/2 NPS.
In instrumentation we use threaded instrument valves downstream of a line class block valve. However, I only buy flanged line-class valves like shutdown valves and control valves for hydrocarbon applications. API 6D is a common requirement for oil and gas applications. ASME B16.34 is another widely used valve requirement. Obtain copies of these standards.
In instrumentation we use threaded instrument valves downstream of a line class block valve. However, I only buy flanged line-class valves like shutdown valves and control valves for hydrocarbon applications. API 6D is a common requirement for oil and gas applications. ASME B16.34 is another widely used valve requirement. Obtain copies of these standards.
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