Metal gaskets

Rolled up gaskets

Пeneral characteristics

The gasket, rolled into a metal sheath, consists of a metal coating and a soft sealing filler.

Sealing filler provides a high level of recoverability, while the metal jacket guarantees a good seal and protects against high pressure, temperature fluctuations and corrosion.

A variety of materials are available to provide excellent joint sealing under specific conditions of use.

Standard gasket profiles:

Standard metal sheath materials

material	According to GOST (State Standard)	According to AISI/ASTM	DIN material #	According to DIN	Resistance	Temperature	Density
Carbon steel	St Зkp	238-С	1,0038	RSt,37,2СБ	100-130	-40/+500	7,85
Stainless steel	12X18H10T	321	1,4541	X10NiTi189	130-190	-250/+550	7,9
Stainless steel	03X10H11	304L	1,4306	X2rNi189	130-190	-250/+550	7,9
Stainless steel	10X17H13M2T	316TI	1,4571	X10CrNiMoTi1810	130-190	-100/+550	7,8
Stainless steel	0.3X17H14M3	316L	1,4404	X2CrNiMo1810	130-190	-100/+550	7,9
Copper-nickel alloy 400	Copper	N0440	2,4360	NiCu30Fe	110-150	-125/+600	8,8
Copper	Copper M1	-	2,0090	-	50-80	-250/+400	8,9

Standard sealing fillers	Dimensions
Graphite -200⁰С-+550⁰С	From 250 to 3000 mm
LPM -100⁰С-+250⁰С	Plates are welded (if necessary)

Ring type joints (RTJ)

General characteristics

Ring-type joints are metal sealing rings used by applications (up to 1000 0C)

Ring type joints are available in two basic designs: oval (M8) and octagonal (M9)

RTJs, used with special flanges, with the right choice of material and profile, ensure a reliable sealing.

Recommended flange surface finish

Profile R1RX11,6(µм)

Profile BX10,8(µм)

Spiral wound gaskets (SWG) SPIRATEM

General characteristics

The sealing part of SWG consists of a V-shaped strip filled with a soft sealing material. The metal strip provides high stability and the soft sealing filler guarantees an excellent sealing property. Thanks to the combination of these materials, SWGs are resistant to changes in operating parameters (temperature and pressure), heat and shock, vibration. Depending on the application, a distinction is made between SWG with an outer and/or an inner ring.

SWG is suitable for use with a wide range of pressure levels and therefore is versatile in application.

SWG can be used for sealing at liquid pressures up to 250 bar and exposure to such ultra-low temperatures as 2000С and high temperatures within + 5500 С / + 11000 С (according to the individual order).

Thanks to the durable SWG, it is easy to install without damage (also additional measures to preserve the gasket must be taken during transport and installation of large diameter gaskets without limited rings).

Outside restrained rings help fit the spiral section exactly in the center of the flange and prevent leakage.

Due to the combination of different materials and metals obtained from the basting, the gaskets can be customized to suit a wide range of applications.

Thanks to its non-stick property, the gasket can be easily removed after use.

The gaskets do not damage the flange surface.

standard sizes:

Flat with a protruding ring, ledge-hollow, thorn-groove, oval and non-standard.

GOST, OST

European Standard 1514-2 (EN 1514-2) (1997)

ASME / ANSI B 16.5 for flanges, 150-900 J 1/2 to 24 per ASME gasket standard B 16.20 (1993)

ASME B 16.47 Series A (MSS SP-44) for flanges, 150 to 900 J = 26 to 60 per ASME Gasket Standard B 16.20 (1998)

Flanges according to DIN standard - for all types

Choice of gasket thickness

Sealing part (mm)	Tolerance (mm)	Sealing part of inner diameter (mm) (D)	Width of sealing part (Rmax) (mm)	Outer ring thickness (mm)	Recommended thickness after shrinkage (mm)
7,2	+0,25	100-3200	33	5	5,3-5,6
6,4	+0,25	100-1600 1601-3200	30 25	4	4,7-4,9
4,5 (4,8)	+0,25	15-630 631-1600 1601-2000	35 30 20	3	3,2-3,4
3,5 3,2	+0,25 +0,25	15-1000 15-1000	25 20	2	2,3-2,5
2,5	+0,25	15-500	10	1,5	1,8-2,0

Nickel gaskets

Nickel gaskets (welded and sharpened), copper (welded and sharpened) for sealing the connectors of the steam generator, filters, ECCS hydraulic tanks, the main connector of the reactor, the upper block, and other equipment