Metal Expansion Joints
METAL EXPANSION JOINTS 
Engineered for rigid piping systems
GMEJ100 Single Metal Expansion Joint
GMEJ100
A Single Metal Expansion joint is the simplest type of metal expansion 
joint with single bellow construction welded or
flanged to end fittings. The single bellows can absorb any
combination of basic movements in pipeline where there
are proper anchors and guides.
Size Availability Standard DN200 – DN4600 (mm)
Design Conditions
Design Pressure Full vacuum ~ 6.89 MPa
Design Temperature -250°C ~ +980°C
Design Fatigue Life Standard 1000 cycles or above
GMEJ200 Double Metal Expansion Joint
GMEJ200
A Universal Double Metal Expansion Joint consists of two bellows 
connected by a center tube, welded or flanges to pipe ends. The
universal arrangement allows greater axial, lateral and
angular movements than a single expansion joint. Increasing the
center spool length produces increased movement capability.
Like the single expansion joint, the double metal expansion joint
are used when proper anchors and guides are present.
Size Availability Standard DN200 – DN4600 (mm)
Design Conditions
Design Pressure Full vacuum ~ 6.89 MPa
Design Temperature -250°C ~ +980°C
Design Fatigue Life Standard 1000 cycles or above
GMEJ210 Tied Double Metal Expansion Joint
GMEJ210
A Tied Double Metal Expansion Joint consists of two bellows 
connected by a center tube piece with tie rods. The tie rods
are connected to the restraining flanges through spherical
washers which allow for movement between the tie rods
and the flanges during operation. This type of expansion
joint can accommodate large movements in the lateral plane
and can operate in any direction.
Size Availability Standard DN200 – DN4600 (mm)
Design Conditions
Design Pressure Full vacuum ~ 6.89 MPa
Design Temperature -250°C ~ +980°C
Design Fatigue Life Standard 1000 cycles or above
GMEJ300 Gimbal Metal Expansion Joint
GMEJ300
A Gimbal Metal Expansion Joint is designed to absorb pressure 
thrust and angular rotation in any plane by two pairs of hinges
connected to a common floating gimbal ring. The gimbal ring, hinges
and pins must be designed to restrain the thrust of the expansion
joint due to internal pressure and extraneous forces.
Size Availability Standard DN200 – DN3600 (mm)
Design Conditions
Design Pressure Full vacuum ~ 6.89 MPa
Design Temperature -250°C ~ +980°C
Design Fatigue Life Standard 1000 cycles or above
GMEJ310 Hinged Metal Expansion Joint
GMEJ310
A Hinged Metal Expansion Joint contains one bellow and is 
designed to absorb angular rotation in one plane only by one
pair of hinges. The hinges and hinge pins must be designed
to restrain the thrust of the expansion joint due to internal
pressure and extraneous forces. Hinged expansion joint
should be used in sets of two or three bonded to absorb
combinations of movements in piping system.
Size Availability Standard DN200 – DN3600 (mm)
Design Conditions
Design Pressure Full vacuum ~ 6.89 MPa
Design Temperature -250°C ~ +980°C
Design Fatigue Life Standard 1000 cycles or above
GMEJ400 Pressure Balanced
Metal Expansion Joint
GMEJ400
A Pressure Balanced Metal Expansion Joint is designed to absorb axial 
movement and/or lateral deflection while pressure loading upon piping
or equipment is considered excessive or objectionable. Pressure
balanced metal expansion joint restrains the pressure thrust through
tie devices, where two bellows are used in the flow end and a single
bellow in the balancing end. The balance bellow will be subjected only
to axial movement if the tie rods are properly designed to rotate or
pivot at their attachment points.
Size Availability Standard DN200 – DN3000 (mm)
Design Conditions
Design Pressure Full vacuum ~ 6.89 MPa
Design Temperature -250°C ~ +980°C
Design Fatigue Life Standard 1000 cycles or above
GMEJ600 Rectangular Metal Expansion Joint
GMEJ600
Rectangular Expansion Joint may be subjected to axial movement, 
angular movement, lateral deflection or any combination of these
occurring at the interface of bellows and the associated ducting
system.
Size Availability Standard Pipe sectional area 0 – 9 m
Design Conditions
Design Pressure ≤ 0.05 MPa
Design Temperature -250°C ~ +980°C
Design Fatigue Life Standard 1000 cycles or above
Garlock Rubber Expansion Joints
Garlock Rubber Expansion Joints are highly regarded in the industry 
» Development of high temperature elastomers to the levels now considered the industry standard
» Development of the patented construction with bonded rectangular body rings
» Creation of fused FEP liners designed specifically for chemical use
» Abilities to combine fabric, FEP and elastomers effectively
» Design of spool type joints to over 3 metres I.D.’s
» Development of the flowing arch design