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API6D Gate Valve Face-to-face and end-to-end dimensions

Unless otherwise agreed, face-to-face (A) and end-to-end (B and C) dimensions of valves shall be in accordance with Tables 2 to 6; see Figures 1 to 13 for diagrams of dimensions A, Band C.
Face-to-face and end-to-end dimensions for valve sizes not specified in Tables 2 to 6 shall be in accordance with ASME B16.1 O. Face-to-face and end-to-end dimensions not shown in Table 2 to Table 6 or in ASME B 16.10 shall be established by agreement.
The length of valves having one welding end and one flanged end shall be determined by adding half the length of a flanged-end valve to half the length of a welding-end valve.
Tolerances on the face-to-face and end-to-end dimensions shall be ± 2 mm for valve sizes ON 250 (NPS 10) and smaller, and ± 3 mm for valve sizes ON 300 (NPS 12) and larger.
The nominal size and face-to-face or end-to-end dimensions shall be stated on the nameplate if not specified in, or not in accordance with, Tables 2 to 6.
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