Meter prover (compact piston prover)
Company / operator legend practice (API 6A, API 521, API 537) / PIP PIC001 / API MPMS ch. 4
Drawn as
A cylinder with a piston (a short vertical bar) inside and detector marks, with inlet and outlet connections and a 4-way or double-block valves to the meter runs.
Meaning
Calibrates the fiscal meters in place. Becomes compact-prover.
Variants
- Pipe (ball) provers are drawn as a long U-loop with launching chambers
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