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CB/T3942 SUS 316L Globe Valve

CB/T3942 SUS 316L Globe Valve

Item

Description

Product Name

CB/T3942 SUS 316L Globe Valve

Certificates

ABS, LR, BV, DNV, RINA, CCS

FOB Price

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Warranty

12 months (unless otherwise specified)

Place of Origin

China

                       

Overview

CB/T 3942 SUS 316L GLOBE VALVE - 1. SCOPE

This standard specifies the classification, requirements, test methods, inspection rules, marking, and packaging of stainless steel flanged stop valves (hereinafter referred to as "stop valves") with flange connection dimensions and sealing surfaces in accordance with GB/T 569 and GB/T 2501.

This standard applies to the design, manufacture, and acceptance of stop valves used in piping systems of liquefied gas carriers, bulk chemical carriers, and naval vessels with nominal pressures not exceeding 6.4 MPa and design temperatures not lower than -165°C. Stop valves for corrosive media in other ship piping systems may also refer to this standard.

CB/T 3942 SUS 316L GLOBE VALVE - 2. WORKING PRINCIPLE

The globe valve operates through a linear motion mechanism. The stem axis is perpendicular to the seat sealing surface. The valve disc is connected to the stem and moves vertically to open or close the flow passage. When the handwheel is turned, the stem rises or lowers the disc, which engages or disengages with the seat ring.

Key operational features:

  • Short stroke: The valve stem travel is relatively short, enabling quick opening and closing.

  • Reliable shut-off: The disc and seat make contact only in the closed position, resulting in minimal mechanical wear on the sealing surfaces.

  • Throttling capability: The valve is suitable for both isolation and flow regulation applications.

  • Easy maintenance: The seat and disc sealing elements can be repaired or replaced without removing the entire valve from the pipeline in most configurations.

  • Flow direction: The flow direction is typically indicated by an arrow on the body. Globe valves can be installed in either direction but are most effective when flow enters from the seat side.

CB/T 3942 SUS 316L GLOBE VALVE - 3. DESIGN & MANUFACTURING STANDARDS

STANDARDDESCRIPTION
CB/T 3942-2002Chinese Marine Industry Standard - Stainless Steel Flanged Stop Valves
GB/T 569-1965Ship flanges - Connection dimensions and sealing faces (for A and B types)
GB/T 2501-1989Ship flanges - Connection dimensions and sealing faces, four-position (for AS and BS types)
GB/T 600-1991General technical requirements for ship piping valves
GB/T 1220-1992Stainless steel bars
GB/T 2100-1980Technical conditions for stainless acid-resistant steel castings
GB/T 3032Marking of ship piping accessories
CCS 1998China Classification Society - Materials and Welding Specifications

Design Standard: CB/T 3942-2002
Testing Standard: GB/T 600-1991

CB/T 3942 SUS 316L GLOBE VALVE - 4. MATERIALS OF CONSTRUCTION

PART NAMEMATERIALSTANDARD
Body / Bonnet / DiscStainless Steel (ZG00Cr17Ni14Mo2 / SUS 316L equivalent)GB/T 2100-1980 or CCS 1998
Body / Bonnet / Disc (Alternative)Stainless Steel (ZG0Cr18Ni9 / SUS 304 equivalent)GB/T 2100-1980 or CCS 1998
Stem / GlandStainless Steel (0Cr13 / 410S)GB/T 1220-1992
Packing / GasketPTFE—
Sealing Surface (PN ≥ 4.0 MPa)Cobalt-Chromium-Tungsten Hard Alloy (Stellite)—

Note 1: The disc may be machined from forging materials.
Note 2: For SUS 316L construction, the body, bonnet, and disc are made of austenitic stainless steel with molybdenum content (ZG00Cr17Ni14Mo2) for enhanced corrosion resistance in chloride-bearing and low-temperature marine environments.

CB/T 3942 SUS 316L GLOBE VALVE - 5. PRESSURE & TEMPERATURE RATINGS

TABLE 1 – MAXIMUM ALLOWABLE WORKING PRESSURE (MPa)

NOMINAL PRESSURE PN (MPa)≤ 20°C100°C150°C200°C250°C300°C350°CNOMINAL SIZE DN (mm)
1.0 (A, B)0.950.860.810.760.710.660.3665~150
1.6 (A, B)1.521.311.291.211.131.061.01125, 150
2.5 (A, B)2.382.152.011.891.771.661.5920~150
4.0 (A, B)3.803.443.223.022.832.652.5465~100
6.4 (A, B)6.095.505.164.834.524.244.1620~50
0.6 (AS, BS)0.570.520.480.450.420.400.3815~300
1.0 (AS, BS)0.950.860.810.760.710.660.63200~300
1.6 (AS, BS)1.521.311.291.211.131.061.01100~300
2.5 (AS, BS)2.382.152.011.891.771.661.5915~300
4.0 (AS, BS)3.803.443.223.022.832.652.5465~100
6.4 (AS, BS)6.095.505.164.834.524.243.9220~50

CB/T 3942 SUS 316L GLOBE VALVE - 6. SIZE RANGE

PARAMETERRANGE
Nominal Size (DN)DN15 ~ DN500
Nominal Pressure (PN)0.6 MPa, 1.0 MPa, 1.6 MPa, 2.5 MPa, 4.0 MPa, 6.4 MPa
Design Temperature≥ -165°C

CB/T 3942 SUS 316L GLOBE VALVE - 7. DIMENSIONS

TABLE 2 – BASIC DIMENSIONS FOR PN 1.0, 1.6, AND 2.5 MPa (TYPE A AND B) (Unit: mm)

PN (MPa)DNSTRUCTURAL L (A)STRUCTURAL L (B)H≈ (A)H≈ (B)WALL THICKNESS tFLANGE DFLANGE D1FLANGE D2FLANGE D3FLANGE bBOLT nBOLT Th.HANDWHEEL D0LIFT SWEIGHT (kg) AWEIGHT (kg) B
1.0652901153102776155123104—144M12140121814.5
1.0803101253453047170138118—144M12160142416.5
1.01003501503743258190158138—148M14180163025.5
1.01254001754263668215183164—1510M14200183642.7
1.01504801804874159240208190—1512M14220204457.7
1.61254001754654058225187168—1710M16250224445.4
1.61504801805244529255217196—1712M16280245758.9
2.52015075217203595684813124M1280874.5
2.525160802172035105735613124M1280975.1
2.532180852362165115836414124M12100996.2
2.540200902602365125937414134M1210011119.7
2.5502309528825861351038414134M12140121411.6
2.565290115335301615512310414144M14160141813.7
2.580310125366325717013811816148M16200172424.5
2.51003501504373788195158138161610M16250223333.6
2.51254001754934338220183164161612M16250224457.3
2.51505002005364868265208190161612M20280245767.3

TABLE 3 – BASIC DIMENSIONS FOR PN 4.0 AND 6.4 MPa (TYPE A AND B) (Unit: mm)

PN (MPa)DNSTRUCTURAL L (A)STRUCTURAL L (B)H≈ (A)H≈ (B)WALL THICKNESS tFLANGE DFLANGE D1FLANGE D2FLANGE D3FLANGE bBOLT nBOLT Th.HANDWHEEL D0LIFT SWEIGHT (kg) AWEIGHT (kg) B
4.065310125409374817513711814184M16200252230.2
4.080350140436394919015012816184M16200283038.1
4.0100400165466418922518115018208M20280243350.4
6.420160802612438100735113124M12100978.3
6.425180852732538110835814124M121009911.0
6.432200903042818125936615144M1412011913.1
6.44023010533431081401078416144M16140121217.4
6.45025011036432381551179616154M16160131523.3

TABLE 4 – BASIC DIMENSIONS FOR AS AND BS SERIES (PN 0.6, 1.0, 1.6, 2.5 MPa) (Unit: mm)

PN (MPa)DNSTRUCTURAL L (AS)STRUCTURAL L (BS)H≈ (AS/BS)WALL THICKNESS tFLANGE DFLANGE D1FLANGE D2FLANGE D3FLANGE bBOLT nBOLT Th.HANDWHEEL D0LIFT SWEIGHT (kg) ASWEIGHT (kg) BS
0.61513090—904805540—124M108083.94.0
0.620150952172034906550—124M108094.74.5
0.625160100——41007560—124M1210095.45.1
0.63218010523621651209070—144M12120116.96.6
0.640200115260236513010080—144M12120118.58.4
0.650230125288258614011090—144M121401211.110.8
0.6652901453353016160130110—144M141601418.117.7
0.6803101553663237190150128—164M161801722.321.9
0.61003501754373788210170148—168M162002034.434.1
0.61254002004934338240200178—168M162202245.244.8
0.61504802255364868265225202—168M162502457.757.5
1.020060027562154310320280258—188M202802698.398.1
1.025073032572162310375335312—208M2032030162.0156.0
1.030085037582169611440395365—228M2036034216.3214.4
1.620060027562154310320280258—208M2028026122.9121.1
1.625073032572162310375335312—228M2032030187.6186.8
1.630085037582169611440395365—248M2036034248.7248.6
2.520060027562154310320280258—228M2028026142.9143.9
2.525073032572162310375335312—248M2032030211.5212.6
2.530085037582169611440395365—268M2036034278.4280.7

TABLE 5 – BASIC DIMENSIONS FOR AS AND BS SERIES (PN 4.0 AND 6.4 MPa) (Unit: mm)

PN (MPa)DNSTRUCTURAL L (AS)STRUCTURAL L (BS)H≈ (AS/BS)WALL THICKNESS tFLANGE DFLANGE D1FLANGE D2FLANGE D3FLANGE bBOLT nBOLT Th.HANDWHEEL D0LIFT SWEIGHT (kg) ASWEIGHT (kg) BS
4.0652901454093748185145122—184M16200192237.6
4.0803101554303949200160133—184M16220222842.6
4.01003501754664169235190158—208M20280243454.1
6.4202301152612438130905814144M12100978.1
6.42523011527325381401006814144M121009911.0
6.43226013030428181551107816144M1612011913.1
6.44033015533431081701258816164M16140121221.7
6.450350175364323818013510216168M16160131527.2

Note: The bolt holes of the inlet and outlet flanges are positioned symmetrically along the centerline of the body.


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