Page 27 - GoodYear Rubber Products 1-866-711-4673 HBD Thermoid Inc

RMA OIL RESISTANCE DATA
The effects of oil on rubber depend on a number of factors that
include the type of rubber compound, the composition of the oil,
the temperature and the length of exposure. The RMA (Rubber
Manufacturers Association) has developed a classification of hose
performance based on sample immersions in ASTM No. 3 oil
(High Swell) at 212°F for 70 hours. Oil resistance classifications
for rubber stocks are shown in the table below.
MINIMUM HOSE BEND RADIUS DATA (MBR)
The Bend Radius is the radius of the bent section of
a hose measured to the innermost surface of the
curved portion. It is important because the minimum
bend radius is the maximum amount a hose can be
bent without being kinked or damaged.
General formula to determine bend length:
Angle of Bend x 2 pr = minimum length of hose to make bend
360° r = given bend radius of hose
Example: to make a 90° bend with a hose with a 2" I.D.
Given r = 4.5 inches
90°
360°
[ 2 x 3.14 x 4.5 ]
.25 x 2 x 3.14 x 4.5 = 7" (inches)
7 inches is the minimum length the hose can be bent without
damaging it.
Remember that the bend should take place over the entire minimum
length and not a portion of it. In addition, the formula does not mean
that 7 inches will be long enough to meet application needs. It only
means that if the 90° bend takes place in less than 7 inches, the
hose could be damaged.
* Reprinted with permission from the Rubber Manufacturers Association (RMA)
Hose Handbook, RMA/IP-2/2003.
Bend
Radius
The Thermoid® Brand Advantage!
HBD/Thermoid® produces durable, top-quality hose products with
lots of value-added features. The CONCURE® continuous
manufacturing process was invented, developed and patented by
HBD Industries, Inc. and helps us produce the finest hose products
possible. Our CONCURE process assures dimensional stability
from end to end, provides a contamination-free and smooth hose
tube in long, unbroken lengths. This process and our continuous
product quality monitoring give us improved dimensional control
and allow for closer tolerance control of the I.D. and O.D. of the
hose from the tube extruder to the finished reel on all our Flex
Strength® hose products. This attention to manufacturing saves
our customers time and money. Here are just a few of the benefits
you receive by selecting Flex Strength hose products:
• Long Length Reels — Over 90% of our reels contain one length
of hose, absolutely no three-piece reels, giving you a 15-20%
savings due to less scrap.
• Product Flexibility/Kink Resistance — Our spiral hose construction
offers improved hose flexibility, easy handling on the job and
provides increased resistance to kinking.
• Uncontaminated Tube — Flex Strength hose is cured with an
air mandrel assuring a clean, smooth tube. No dirt or other
contaminants to clog nozzles or damage air tools.
• Brighter Colors/Pin-Pricked Covers — The CONCURE process
provides for more vivid colors for increased visibility and easier
identification. Usually present only on critical applications, most
Flex Strength hose products have a pin-pricked cover.
• Wider Working Pressure Range/More Hose Grades — Flex Strength
hose is available with pressure ratings from 150 to 300 psi
working pressure, assuring you have the right hose for the job.
Our wide variety of products allows you to find the correct hose
for every application.
• Convenience Branding — Our industrial hose products are branded
with size, working pressure, type, Made In USA. Optional
branding information is available for private branding as well.
GENERAL HOSE INFORMATION
800/543-8070 Fax 800/423-4354 www.hbdthermoid.com
GENERAL INFORMATION
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RM
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Product information is subject to change. For full details, visit our website or contact Customer Service.
HBD/Thermoid®, Inc. – Leadership through Technology
HBD/Thermoid, Inc. has been and continues to be a leader in
developing innovative hose product designs and manufacturing
production techniques. This long-term commitment to hose manu-
facturing benefits all of our customers. Our production expertise
provides customers with hose products that they can rely on to
stand up to the roughest types of industrial and/or working environ-
ments. Outlined below are a few examples of the many hose prod-
ucts, design types and unique manufacturing techniques that assist
customers with their daily hose product needs:
Handbuilt
With over 100 years of design experience, HBD/Thermoid, Inc. is
the leader in handcrafted hose. The line is built by an experienced
design team, using a computer-aided system that has received
worldwide product approvals. This hose line is not your everyday
water hose; it’s one that encompasses products like submarine,
rotary and the patented Hy-Flex™ dock hose.
Spiral
HBD/Thermoid’s LX-200 production lines now produce a selection
of Thermoid’s most popular hoses in continuous lengths to 200
feet. The most notable example is the Transporter ® line, which
encompasses a wide variety of markets such as petroleum,
material handling, chemical and food service.
Thermocure
With this process, HBD/Thermoid has become a potent force in
the PED, Fuel Oil Delivery and LP Gas markets with such product
lines like the Hi-Vac™ and Superlite® vapor recovery hoses, the
Cobra™ FOD hose and the Type 75 LP Gas hose, just to name
a few. The Thermocure process gives these first class products, a
showroom quality look.
Hose Physical Properties After Exposure to Oil
Volume Tensile
Change Strength
Classification Maximum Retained
Class A
(High Oil Resistance) +25% 80%
Class B
(Medium-High Oil Resistance) +65% 50%
Class C
(Medium Oil Resistance) +100% 40%
RMA IP-8 (2002) Specification for Oil Suction and Discharge
Hose definitions from section 8.3 for “ED” and “EC” hose
as follows; Electrically Discontinuous (ED) hose assembly has
a maximum allowable resistance of 100 ohms as ascertained by
using a 9 volt ohmmeter. Electrically Continuous (EC) hose
assembly has a minimum allowable resistance of 25,000 ohms
as ascertained by using a 500 volt megger.