FLANGE STANDARD LIBRARYAX FORGE · SPEC SHEET
SPEC SHEETNo. 685
ASME B16.5 · ASME B16.5-2025

B16.5 Class 900 24″ Blind

DN600BlindDimensions mmWeight kg
ASME B16.5 · 24″ (DN600) · Class 900 · Blind FlangeASME B16.5 · 24″ (DN600) · Class 900 · Blind Flange O.D. D 1041.4 Bolt circle K 901.7 20ר66.7 Raised face Ø 692.2 Thickness C 139.7 RF height f 6.4 Both views share one scale (1:16); schematic only Unit: mm

Schematic — drawn from the table, not to scale for inspection.

SymbolItemValue
DOutside diameter1041.4mm
CFlange thickness / blind thickness139.7mm
D2Raised face diameter692.2mm
fRaised face height6.4mm
KBolt circle diameter901.7mm
nNumber of bolt holes20pcs
dBolt hole diameter66.7mm
—Approximate weight919kg

Pressure–temperature ratings · Class 900 · Group 1.1

≤ 38 °C153.1 bar50 °C149.3 bar100 °C140.1 bar150 °C135.2 bar200 °C131.5 bar250 °C125.9 bar300 °C119.7 bar325 °C116.0 bar350 °C112.9 bar375 °C109.2 bar400 °C103.9 bar425 °C86.2 bar450 °C68.9 bar475 °C52.5 bar500 °C34.6 bar538 °C17.4 bar

Source: Table 2-1.1 (printed p. 25) — pressure–temperature ratings for Group 1.1 materials, SI units; Group 1.1.

Material and notes

Base material: ASTM A105 (North America, Middle East, South-East Asia)

Rating: ASME classes are not fixed pressures. For ASTM A105 (material group 1.1) the ASME B16.5-2025 ambient rating is 285 psi (19.6 bar) at Class 150, 740 psi (51.0 bar) at Class 300, 985 psi (68.0 bar) at Class 400, 1,480 psi (102.0 bar) at Class 600, 2,2…

Tolerances / marking: Tolerances, facing finish, material and marking requirements: ASME B16.5-2025 Sections 6 and 7.

Notes / special requirements

Work order Inspector Date Travels with the part; file after inspection