RKFM has obtained certifications from ABS, BV, DNV, LR, CCS, KR, and NK classification societies. “Starting with precision in every valve, we strive to revitalize China's shipbuilding industry.”
RKFM has obtained certifications from ABS, BV, DNV, LR, CCS, KR, and NK classification societies. “Starting with precision in every valve, we strive to revitalize China's shipbuilding industry.”

GB/T 593-2019: Marine Flange Stainless Steel Packing Cocks - Standards & Specifications

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GB/T 593 Marine flange stainless steel packing cock basic parameters:

Connection methodformshapehighest working pressure pMpa


Nominal pressure

PN
Nominal diameterDN/mmInterface standardsApplicable mediaMaterial
Category F: flange connectionFAdirect0.6 6.0 20~80CB/T4196Fresh water, sea water, lubricating oil, fuelBronze, cast iron, stainless steel
FASCB/T2501
FLTee L typeCB/T4196
FLSCB/T2501
FTThree way T typeCB/T4196
FTSCB/T2501
Category T: threaded connectionThreads on both endsTA、Straight-through, three-way L type, three-way T type11032CB/T4456Bronze, stainless steel
TL、1.61620、25
TT2.5256~15CB/T4328
Threaded on one end, bleed fitting on the otherTBdirect11032CB/T4456
1.61620、25
2.5256~15CB/T4328
TCright angle0.1-10~25CB/T4456


Main parts materials:

Part NameMaterial
TypeTrademarkMaterial codestandard encdoing
Body, plug corecast tin bronzeZCuSn10Zn2Q1GB/T 1176-2013
ZCuSn5Pb5Zn5Q2
Stainless steelZG07Cr20Ni10N1
ZG07Cr19Ni11Mo2N3
Ontologygrey cast ironHT200HTGB/T9439-2010
wrenchCarbon structural steelQ235B-GB/T700-2006
fillerPTFE---


FA、FL、FT Basic dimensions of stainless steel cocks:


Nominal pressure

PN/
Nominal diameter DN/
mm
structure sizewall thickness/tflangebolthandle L0theoretical weight/kg
LHH1
DD1D2bd0n/个Th.FA型FL型FT型
62014513940495684812134M121252.7 3.1 3.0 
25155149411057356131403.3 3.7 3.7 
321651684851158364156M141604.1 4.7 4.6 
40190192561259374141806.1 7.7 7.6 
5020524365135103842308.6 10.2 10.10 
6522528580615512310425011.1 15.6 13.9 
8024532496170138118832016.8 19.2 19.0 


FAS、FLS、FTS Basic dimensions of stainless steel cocks:

Nominal pressurePN/Nominal diameter DN/
mm
structure sizewall thickness /tflangebolthandleL0theoretical weight/kg
LHH1
DD1D2bd0nTh.FAFLFT
62015013940490655014114M101252.7 3.1 3.0 
251601494110075601403.3 3.7 3.7 
3218016848512090701614M121604.5 5.35.2
4020019256130100801806.78.4 8.3
5023024365140110902309.511.3 11.1
6529028580616013011025012.115.215.1
80310324961901501281818M1632018.1 21.0 20.8


TA、TL、TT Basic dimensions of stainless steel cocks:


Nominal pressure

PN/
Nominal diameter DN/
mm
structure sizeThreaded jointhandleL0theoretical weight/kg
LH1HDD1D2LL1
TATLTT
25 6702060M22*1.519.8 101431000.37 0.44 0.43 
10782772M27*1.524.8 14161100.61 0.64 0.63 
15923792M36*233 222251150.85 1.12 1.10 
16 2098409933 2420-1251.35 1.53 1.51 
2510642108M42*239 291401.69 2.01 1.98 
10 3212649120M48*245 361603.01 3.47 3.38 


TB Basic dimensions of stainless steel cocks


Nominal pressure

PN/
Nominal diameter DN/
mm
structure sizewall thickness/tThreaded jointhandle/L0theoretical weight/kg
LL1H1HDD1D2LL1L2
25 6602520605M22*1.519.8 1014331000.36 
1069302772M27*1.524.8 14161100.56 
1587413792M36*233 222251150.84 
16 2092434099433 2420321251.27 
251035042108M42*239 29211401.51 
10 3211956491205M48*245 361602.86 


TC Basic dimensions of stainless steel cocks

最高工作压力/MPaNominal diameter DN/
mm
structure sizewall thickness/t

Threaded joint

/D

Hexagon opposite sides 

/S

keyhole/dhandle/L0theoretical weight/kg
LL1H1H
0.1 10581421583M22*1.522 6800.52 
1567182665M27*227 850.78 
20812203277M33*336 71001.05 
2598223790M42*241 71201.59 


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