CB/T 4420 Marine Cryogenic Stainless Gate Valve
Item | Description |
|---|---|
Product Name | CB/T 4420 Marine Cryogenic Stainless Gate Valve |
Certificates | ABS, LR, BV, DNV, RINA, CCS |
FOB Price | Get Latest Price Now |
Warranty | 12 months (unless otherwise specified) |
Place of Origin | China |
Overview
1. SCOPE
This standard specifies the classification, marking, requirements, test methods, inspection rules, marking, packaging, and storage of ultra-low temperature stainless steel gate valves for ship use (hereinafter referred to as "gate valves").
This standard applies to the design, manufacture, and acceptance of gate valves for liquefied gas ship cargo piping systems with nominal pressure PN20 (Class150) and design temperatures from -196 °C to -80 °C.
2. CLASSIFICATION
2.1 TYPE
Gate valves are divided into the following two types according to connection form:
a) Type A: Gate valves with flanged ends at both ends, connection dimensions per ASME B16.5;
b) Type W: Gate valves with buttwelding ends at both ends, welding end dimensions per ASME B16.25.
2.2 BASIC PARAMETERS
| Type Designation | Nominal Pressure PN | Working Pressure P MPa | Nominal Size DN | Working Temperature T °C | Applicable Medium |
|---|---|---|---|---|---|
| Type A, Type W | 20 (Class150) | 1.0 | 80~350 | -196~-80 | LNG and other liquefied gases |
3 MATERIALS
| Part Name | Material Name | Grade | Standard No. |
|---|---|---|---|
| Body | Stainless Steel | CF8M/CF3M* | ASTM A351 |
| Bonnet, Gate | CF8M | ||
| Stem | F316L | ASTM A182 | |
| Gland Assembly, Gland Plate, Gland | 316L | ASTM A276 | |
| Pressure Cover, Handwheel | |||
| Gasket, Filler | PTFE | PCTFE | - |
| Sealing Assembly | Combination | 316L+PCTFE | - |
| Bonnet Bolts | Stainless Steel | B8, Class 2 | ASTM A320 |
| Bonnet Nuts | 8M | ASTM A194 |
Note: *CF3M is used for Type W.
DRAWING
STRUCTURE AND BASIC DIMENSIONS
BASIC DIMENSIONS OF GATE VALVES DN80~DN200 (Unit: mm)
| Nominal Size DN | Inner Diameter Δ | Structure Length L | Structure Dimensions H | W | Lift m | Min. Wall Thickness t | Flange Connection Dimensions | Welding End Connection Dimensions | Theoretical Mass kg | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type A | Type W | D | D1 | D2 | T | n-d | A | B | Type A | Type W | |||||||
| 80 | 80 | 203 | 282 | 703 | 250 | 88 | 10.4 | 190 | 152.4 | 127.0 | 24.3 | 4-Φ19 | 88.9 | 82.8 | 40 | 36 | |
| 100 | 100 | 229 | 305 | 831 | 120 | 11.2 | 230 | 190.5 | 157.2 | 8-Φ19 | 114.3 | 108.2 | 57 | 48 | |||
| 150 | 150 | 267 | 403 | 1 020 | 300 | 166 | 11.9 | 280 | 241.3 | 215.9 | 25.9 | 8-Φ22 | 168.3 | 161.5 | 90 | 82 | |
| 200 | 200 | 292 | 419 | 1 275 | 350 | 229 | 12.7 | 345 | 298.5 | 269.9 | 29.0 | 219.1 | 211.6 | 151 | 140 |
Note: * Dimension B is the inner diameter of the pipe with wall thickness number 10S per ASME B36.10. When ordering, dimension B should correspond to the inner diameter of the connecting pipe.
BASIC DIMENSIONS OF GATE VALVES DN250~DN350 (Unit: mm)
| Nominal Size DN | Inner Diameter Δ | Structure Length L | Structure Dimensions H | H1 | W | L1 | Min. Wall Thickness t | Flange Connection Dimensions | Welding End Connection Dimensions | Theoretical Mass kg | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Type A | Type W | D | D1 | D2 | T | n-d | A | B | Type A | Type W | ||||||||
| 250 | 250 | 330 | 457 | 1 550 | 1 310 | 310 | 362 | 14.2 | 405 | 362.0 | 362.0 | 30.6 | 12-Φ25 | 273.0 | 264.6 | 260 | 244 | |
| 300 | 300 | 356 | 502 | 1 750 | 1 380 | 460 | 16.0 | 485 | 431.8 | 381.0 | 32.2 | 323.8 | 314.7 | 375 | 360 | |||
| 350 | 350 | 381 | 572 | 1 970 | 1 500 | 16.8 | 535 | 476.3 | 412.8 | 35.4 | 12-Φ29 | 355.6 | 342.3 | 487 | 470 |
Note: * Dimension B is the inner diameter of the pipe with wall thickness number 10S per ASME B36.10. When ordering, dimension B should correspond to the inner diameter of the connecting pipe.
