BULLETIN 900-MR9-1
MASON/MERCER EXPANSION JOINTS
9
•
108
PERFORMANCE FEATURES
• Pressures, vacuum ratings and temperature tolerance
as detailed on pages 9
•
109 - 9
•
110
• M inimum 3 to 1 safety factor, rated to burst pressure
• High temperature resistant fabric reinforcement for
operating temperatures up to 400°F
• Expansion Joints are pressure cured, resulting in a
structurally sound product with long service life
• O ptional exterior coat of Hypalon
®
paint provides
additional protection against ozone weathering and
chemical exposure
CONSTRUCTION FEATURES
• E xtra wide arch for greater movement
• M olded sizes from 1
1
/2" up to 36" diameter
• C hoice of eight liner elastomers
• Choice for cover to match liner materials or different
materials for superior resistance to external conditions
• Baked Enamel, Galvanized Ductile Iron, Carbon or
Stainless Steel Split Backup Rings
• 150 lb ASA drilling is standard. Other drillings or completely
customized drillings as required. Opposite flanges can
have different drillings to serve as transition pieces
• Reinforcement–Steel Rings and multiple plies of
Polyester or Nylon Tire Cord
• H and-built to your exact specifications
• Can be built with permanent offset to compensate
for existing or designed piping misalignment
SERIES
The Invincible 900 Series adopts the best features of our
series 450 and 500's. While rated at lower pressures, it
has higher movement capabilities and lower spring rates.
All joints are hand built by our skilled craftsmen. The
1
/
4
"
minimum thickness solid elastomer tube is continuous.
Multiple plies of rubber impregnated high strength polyes-
ter or nylon tire cord form the first pressure reinforcement
over the tube. Arch swell in response to pressure and arch
migration are virtually eliminated by crisscrossed layers of
reinforcement that pass over the arch and around steel rings
embedded on both sides at the base of the arch.
A minimum of two additional plies provide protection to the
carcass and the cover. The layered reinforcement and cover
materials are carried through the full faced flanges.
For hand-wrapped Joints, flanges are brought to thickness by
bolting the steel flange forms. The body is pressure wrapped
by layers of nylon tape. For molded Joints, both flanges and
body are formed in cavities of the molds. The joint is cured in a
pressurized thermostatically controlled steam chamber or oven
for optimum performance.
After the wraps, forms or molds are removed, the final product
is a tough homogeneous expansion joint customized to safely
handle the intended service. A variety of tube, cover and carcass
elastomers are available and selected to provide superior
chemical and aging resistance in temperatures ranging from
-30° to 400°F (See Bulletin CRG-MR1 pages 9
•
59 - 9
•
68).
SERIES HT
The Invincible HT900 has all the construction features of the
900 combined with high temperature capability. DuPont
™
Kevlar
®
or other heat resistant fabrics replace the polyester or nylon.
The tube and cover are either EPDM or Viton
®
for full pressure
service up to 350°F and 400°F respectively.
MERCER INVINCIBLE
HIGH MOVEMENT
EXPANSION JOINTS
900 &
HT900
Series
Distributor:
Interflex Hose & Bellows Ltd. • www.interflex.co.uk
Ludlow Eco Park • Ludlow • Shropshire • SY8 1FF • UK
Tel.: +44 (0)1584 878500 • Email: enquiries@interflex.co.uk
BULLETIN 900-MR9-1
MASON INDUSTRIES | MASON-IND.COM
9
•
109
SERIES
MATERIAL AVAILABILITY
& OPERATING TEMPERATURES
Series
900
Standard Materials
Max.
Oper.
Temp.Tube Cover
B Butyl Butyl 250°F
E EPDM EPDM 250°F
H Hypalon
®
Hypalon
®
225°F
HN Hypalon
®
Neoprene
225°F
N Neoprene Neoprene 225°F
NH Neoprene Hypalon 225°F
Ni Nitrile Nitrile 210°F
NiN Nitrile Neoprene
210°F
NR Neoprene Natural 180°F
R Natural Natural 180°F
RN Natural Neoprene 180°F
V Viton
®
Viton
®
250°F
SERIES HT
MATERIAL AVAILABILITY
& OPERATING TEMPERATURES
Series
HT900
High Temperature
Material
Max.
Oper.
Temp.Cover
K-E EPDM 350°F
K-V Viton
®
400°F
BACKUP RINGS
Standard expansion joints are furnished with ASA-150 backup
rings. Series ASA-300, DIN, PN, JIS and British Standards are also
available, but sometimes at higher cost. Check factory for pricing.
FILLED ARCHES
All of the styles are available with filled arch construction for
use with heavy slurries. The continuous liner prevents material
build-up in the arch. Filled arch joints have 50% of open arch
movements.
CUSTOM DESIGNS
Published dimensional data is for “Standard” joints. However,
about 50% of Mercer business consists of building custom joints.
Mercer can custom
design joints for most
special requirements.
DIN
PN
JIS
British
MISMATCHED
FLANGES
OVERSEAS
FLANGES
OFFSET JOINTS UNPARALLEL
FACES
ASA
150
ASA
300
LONGER OR SHORTER
FACE TO FACE
Pressure testing of 901 joint 36” ID x 10” FF
ANCHORED PIPING APPLICATIONS
Compression
Sleeves
Axial
Extension
Control Rod
Assembly
Gusset
Plate
Rubber Washer
& Steel Washer
SPRING MOUNTED EQUIPMENT
OTHER UNANCHORED APPLICATIONS
Rubber Washer
& Steel Washer
Control Rod
Assembly
Gusset
Plate
Control Rod Stop Nut Finger
Tight Against Gusset Plate
MASON/MERCER EXPANSION JOINTS
BULLETIN 900-MR9-1
9
•
110
Series 900 & HT900
Flange
Outside
Dia.
Face
to
Face
Overall
Flange
Thickness
Bolt
Circle
Dia.
Bolt
Hole
Dia.
Allowable Movements
Pressure
Rating
Pressure
Thrust
Area
Pipe
Size
No.
of
Holes
Axial
Compression
Axial
Extension
Lateral
Deflection
Vacuum
Rating
(in) (in) (in) (in) (in) (in) (in) (in) (in) (psi) (in
Hg) (in
2
)
1
1
/2 5 6
3
/4 3
7
/8 4
5
/8 2 1
1
/8 1
1
/8 250 30 5
2 6 6
7
/8 4
3
/4 4
3
/4 2 1
1
/8 1
1
/8 250 30 8
2
1
/2 7 6
7
/8 5
1
/2 4
3
/4 2 1
1
/8 1
1
/8 250 30 10
3 7
1
/2 6
7
/8 6 4
3
/4 2 1
1
/8 1
1
/8 250 30 13
4 9 6
7
/8 7
1
/2 8
3
/4 2 1
1
/8 1
1
/8 250 30 21
5 10 6
7
/8 8
1
/2 8
7
/8 2 1
1
/8 1
1
/8 250 30 29
6 11 6
7
/8 9
1
/2 8
7
/8 2 1
1
/8 1
1
/8 250 30 40
8 13
1
/2 6
7
/8 11
3
/4 8
7
/8 2 1
1
/8 1
1
/8 250 30 65
10 16 8
7
/8 14
1
/4 12 1 2
1
/4 1
1
/4 1
1
/4 250 30 97
12 19 8
7
/8 17 12 1 2
1
/4 1
1
/4 1
1
/4 250 30 135
14 21 8 1
1
/4 18
3
/4 12 1
1
/8 2
1
/2 1
3
/8 1
1
/2 250 20 201
16 23
1
/2 8 1
1
/4 21
1
/4 16 1
1
/8 2
1
/2 1
3
/8 1
1
/2 180 20 254
18 25 8 1
1
/4 22
3
/4 16 1
1
/4 2
1
/2 1
3
/8 1
1
/2 180 20 314
20 27
1
/2 8 1
1
/4 25 20 1
1
/4 2
1
/2 1
3
/8 1
1
/2 150 20 380
24 32 10 1
1
/4 29
1
/2 20 1
3
/8 2
3
/4 1
1
/2 1
5
/8 150 20 559
30 38
3
/4 10 1
1
/4 36 28 1
3
/8 2
3
/4 1
1
/2 1
5
/8 125 20 839
36 46 10 1
3
/8 42
3
/4 32 1
5
/8 2
3
/4 1
1
/2 1
5
/8 125 20 1175
STYLE 901 OPEN ARCH DIMENSIONS, ALLOWABLE MOVEMENTS
*
& PRESSURES
†
*
Reduce movements 50%
when using filled arches.
†
Higher pressure joints are
special design- Advise
factory of requirements.
Sizes up to 144 available-
consult factory.
Reinforcement Carcass Made
of Multiple Plies of Tough
Elastomer-Impregnated
Fabric or Tire Cord
Cover
Optional Coating of
Hypalon
®
Paint
Smooth
Leak Proof
Tube
Overall
Flange
Thickness
Face
to
Face
I.D. Same
as Pipe Size
Flange
O.D.
Embedded
Solid Steel
Hoop Rings
Retaining
Rings
Bolt Circle
Diameter
Standard
150 lb Drilling
EXPANSION JOINTS INSTALLED IN PIPING SYSTEMS
MUST BE ANCHORED ON BOTH SIDES OF THE JOINT.
In this case, no control rods are necessary providing piping movements
are within the rated movements of expansion joint.
Rigid Steel Mating Flange
(weld neck or slip on type)
Vanstone or Floating Stub
Flanges Not Recommended,
and Flange Hardware
Supplied by Others
Gusset
Compression
Sleeves
Control Rods
If control rods are installed as a safety measure, the locking nuts must
be backed off with a clearance equal to the specified axial movement.
The expansion joint will exert a thrust force or pressure thrust on the
anchors which can be calculated using the following equation:
Pressure Thrust = (Pressure Thrust Area) x (Rated Working Pressure)
EXPANSION JOINTS INSTALLED IN UNANCHORED
PIPING OR CONNECTED TO ISOLATED EQUIPMENT
MUST HAVE CONTROL RODS.
Control rods are installed with the nuts on the control rods be hand
tighten to the gussets, thereby locking them out. The joint will no longer
take up axial motion since the pressure will extend the joint into the nuts
of the control rods. It will make up for misalignment, transverse and
possibly angular motion.
PIPE ALIGNMENT
Initial misalignment should be kept to a maximum of
1
/8".
PIPE FLANGE
Expansion joint flanges must be in contact with a continuous surface, or
a maximum of
1
/16" standard raised face.
Depressions or protrusions typical of victaulic or similar type flanges must
be covered with a steel spacer flange to provide a continuous surface.
BULLETIN 900-MR9-1
MASON INDUSTRIES | MASON-IND.COM
9
•
111
Guide Spacing
Remote
Anchor
Close
Anchor
14D
4D
Locate Anchor as
close as practical, but
not exceeding 4D
Expansion Joint Movement based on
thermal variation over length shown
Guide Spacing
14D 4D
4D
Guide Spacing
14D
4D
Installation Instructions - 900 & HT900
IMPORTANT
a. Do not weld in vicinity of expansion joint.
b. Do not lift expansion joint by bolt holes; use padded
sling.
c. Never operate joint beyond its rated temperature,
pressure or movements (see
page 9
•
110).
d. Mating flanges must be flat or raised face. Do not
mate with contoured flanges such as victaulic or
similar configurations.
e. Check for chemical compatibility with the ordered material.
1. A ll pipelines must be properly supported, anchored and
guided so joints do not carry pipe or thrust loads.
2. If piping is not anchored, control units must be used.
3. Use of control units and thrust sleeves will not protect
piping in anchored situations. Expansion joints must be
selected for adequate movement capability.
4. Piping should be aligned. Misalignment or improper face
to face openings will reduce the allowable motion by the
initial inaccuracy. Joints are often damaged if forced into
position.
5. Apply a thin film of graphite, dispersed in glycerin or
water to the rubber flange face and between the backup
ring and the back of the rubber flange to prevent rubber
adhering to the mating metal flange for easy removal of
the joint without damage. No gaskets or gasket sealants
should be used.
6. Install bolts from the backup ring side to avoid bolt
projections cutting the cover. If this is impossible, bolts
should not project more than
1
/8" past the nuts. Use
washers over split ring gaps.
7. U nlike tightening hard flanges, tighten bolts in series
making at least three complete circuits of each flange.
Flanges will accept full bolt torque.
8. A fter system is in service at operating temperature, check
the flange bolts and retighten as necessary. Repeat in a few
weeks or if leaks develop. It is normal for rubber flanges
to relax after initial installation. Check periodically until
bolts remain tight.
9. A ny gouges or cuts in the cover caused during installation
should be inspected and sealed.
10. I f control rods are used, the clearance between the
rubber washer and the gusset plate should be the
allowable axial elongation, if the expansion joint is installed
at the published face to face. We do not recommend
precompression or extension as general practice, but if the
joint is compressed, the gap is increased by the decrease
in length. If installed elongated, the gap is decreased by
the increase in length. Hold one end against the control
rod plate and the washers against the nut on the other
end when measuring the gap.
EXAMPLES
14" - 901 – Allowable Extension 1
3
/8"
1. 14" - 901 is installed at published 8" face to face
dimension.
Set control rod gap to 1
3
/8".
2. 14" - 901 is installed 7
3
/4" long.
Set control rod gap to 1
3
/8" plus 1/4" = 1
5
/8"
3. 14" - 901 is installed 81/4" long.
Set control rod gap to 1
3
/8" minus 1/4" = 1
5
/8"
11. I f compression sleeves are used, no setting is required as
they are furnished to proper length.
12. I f these instructions are not strictly adhered to, the Mercer
One-Year Guarantee is void. Joints should be checked at a
maximum of one year intervals for signs of cracking and
hardening. Expansion joints showing these symptoms
must be replaced regardless of age.
Guide Spacing – Referencing Pipe Diameter “D”
GUIDES AND ANCHORS FOR JOINT
LOCATED BETWEEN ANCHORS
Guide Spacing
Remote
Anchor
Close
Anchor
14D
4D
Expansion Joint Movement based on
thermal variation over length shown
4D
Locate Anchor
as close as practical,
but not exceeding 4D
GUIDES FOR JOINT
WITHOUT ANCHORS
Distributor:
Interflex Hose & Bellows Ltd. • www.interflex.co.uk
Ludlow Eco Park • Ludlow • Shropshire • SY8 1FF • United Kingdom
Tel.: +44 (0)1584 878500 • Email: enquiries@interflex.co.uk
