Cap
Size | 1/2″~72 “ |
/Wall Thickness | 2mm – 50mm / SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS |
Manufacturing Standards | ASTM A403 WP Gr. 304, 304H, 309, 310, 316, 316L, 317L, 321, 347, 904L |
ASTM A 234 WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70. | |
Materia | 20#, 20G,Q235-A, ASTM A 234 WPB , WPBW, WPHY 42, WPHY 46, WPHY 52, WPH 60, WPHY 65 & WPHY 70 |
16Mn, ASTM A420 WPL3, A420 WPL6 | |
ASTM / ASME A/SA 234 Gr. WP 1, WP 5, WP 9, WP 11, WP 12, WP 22, WP 91, WB36, 12CrMo, 15Cr5Mo, 1Cr5Mo, 12Cr1MoV |
Nominal Pipe Size | Outside diameter at Bevel | Length(2) | Limiting wall Thickness for Length | Length(3) |
1/2 | 21.3 | 25.4 | 4.6 | 25.4 |
3/4 | 26.7 | 25.4 | 3.8 | 25.4 |
1 | 33.4 | 38.1 | 4.6 | 38.1 |
1-1/4 | 42.2 | 38.1 | 4.8 | 38.1 |
1-1/2 | 48.3 | 38.1 | 5.1 | 38.1 |
2 | 60.3 | 38.1 | 5.6 | 44.4 |
2-1/2 | 73.0 | 38.1 | 7.1 | 50.8 |
3 | 88.9 | 50.8 | 7.6 | 63.5 |
3-1/2 | 101.6 | 63.5 | 8.1 | 76.2 |
4 | 114.3 | 63.5 | 8.6 | 76.2 |
5 | 141.3 | 76.2 | 9.7 | 88.9 |
6 | 168.3 | 88.9 | 10.9 | 101.6 |
8 | 219.1 | 101.6 | 12.7 | 127.0 |
10 | 273.1 | 127.0 | 12.7 | 152.4 |
12 | 323.9 | 152.4 | 12.7 | 177.8 |
14 | 355.6 | 165.1 | 12.7 | 190.5 |
16 | 406.4 | 177.8 | 12.7 | 203.2 |
18 | 457.2 | 203.2 | 12.7 | 228.6 |
20 | 508.0 | 228.6 | 12.7 | 254.0 |
22 | 558.8 | 254.0 | 12.7 | 254.0 |
24 | 609.6 | 266.7 | 12.7 | 304.8 |
26 | 660.4 | 266.7 | ||
28 | 711.2 | 266.7 | ||
30 | 762.0 | 266.7 | ||
32 | 812.8 | 266.7 | ||
34 | 863.4 | 266.7 | ||
36 | 914.4 | 266.7 | ||
38 | 965.2 | 304.8 | ||
40 | 1016.0 | 304.8 | ||
42 | 1066.8 | 304.8 | ||
44 | 1117.6 | 342.9 | ||
46 | 1168.4 | 342.9 | ||
48 | 1219.2 | 342.9 |
Wall thickness for caps up to and including 36" conform to ANSI B36.10 specifications. Caps 38" and larger conform to XS specifications
for wall thickness of 36". These are Wellgrow's standards as no intemationally recognized standards have been set for such large size wall thickness.
(1) The shape of these caps shall be ellipsoidal and shall conform to the shape requirements as given in the ASME boiler and pressure vessel code.
(2) Length E applies for thickness not exceeding that given in column“limiting wall thickness for length E”.
(3) Length E1 applies for thickness greater than given in column “limiting wall thickness” for NPS 24 and smaller.For NPS 26 and larger,length E1 shall
be by agreement between manufacturer and purchaser.