Page 29 - GoodYear Rubber Products 1-866-711-4673 HBD Thermoid Inc

When making a selection for this type of application, keep safety in
mind. Be sure to select a hose identified as steam hose. There
should be a permanent form of branding on the hose and not just
on the package. The manufacturer’s name, hose type and operating
pressure should be readable. If not, don’t use the hose. Also, be
sure to identify the type of service the steam hose will be required
to accomplish. What will the temperature of the steam be? Will the
steam be superheated (dry) or saturated (wet)? What environment
will this hose be used in? Be sure that you can recognize that
spillage or accumulations of corrosive materials can have a
detrimental effect on the hose cover.
Make sure the hose is installed properly by using hose couplings
designed for steam service. Check the tightness with each use.
Installing and using a shut-off valve between the steam source and
the hose will maximize service life and operator safety.
Provide operators with adequate clothing which would include
rubber boots, gloves, eye protection and full length protective
clothing. Do not allow the hose to remain under pressure when
not in service. Failure to depressurize and drain the hose when not
in service can reduce the usable life of the hose. Continue to
monitor hose to ensure it has not deteriorated to the point to where
it can no longer provide safe service. Most, if not all steam hoses
are date-coded by the manufacturer. It is recommended that
assemblies be tagged with a date that it went into service. This
information will be helpful in identifying those hoses that should be
replaced due to age.
Couplings: Hose couplings are extremely important when steam is
being handled. High temperatures and pressures inside steam hose
act like a pressure cooker and cause the inside and outside diame-
ters to shrink during use. Couplings must be specifically designed
to combat this effect. Only couplings designed for steam hose
should be used .
800/543-8070 Fax 800/423-4354 www.hbdthermoid.com
GENERAL INFORMATION
AL
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Product information is subject to change. For full details, visit our website or contact Customer Service.
CHEMICAL HOSE WARNING
Do not use chemical hose at pressures or temperatures above
those recommended by HBD/Thermoid. All operators must be
thoroughly trained in the care and use of these hoses, and must,
at all times, wear protective clothing and other appropriate safety
equipment. A hose or system failure could cause the release of
corrosive, flammable or poisonous material. Never allow chemicals
to drip on the exterior of the hose or allow the hose to lie in a pool
of chemicals since the hose cover may not have the same
chemical resistance as the inner tube. If kinking or crushing occurs,
immediately subject the assembly to the Hydrostatic Pressure
Test and Examination. If the Hydrostatic Test is not an option,
immediately replace the assembly. If the reduction of the I.D. is
greater than 20%, replace the assembly.
Extreme care must be taken when flushing out a chemical
hose with water or removing clogs. Some chemicals, such as
concentrated acids may react with the water. Spattering may
occur which could result in serious injury to the eyes or other
areas of the body. When flushing the hose, care must be taken
so that all chemicals or flushing fluids are disposed of according
to EPA recommended guidelines.
STATIC ELECTRICITY WARNING
Serious bodily injury, death, property damage or other loss,
can result from the use of hose in hazardous or explosive
atmospheres due to the buildup of static electricity from the
movement of conveyed materials through the hose as well as
movement or vibration of the hose against the other surfaces.
Hose, as well as the entire system or application, used in such
atmospheres must be properly grounded or bonded. For this
reason, HBD/Thermoid recommends only hose with static wire
be used.
Static electricity, as a source of ignition for flammable vapors,
gases and dusts, is a hazard common to a wide variety of
industries. A static spark can occur when an electrical charge
accumulates on the surfaces of two materials that have been
brought together and then separated (between two solids, between
a solid and a liquid, or between two immiscible liquids, i.e.,
incapable of mixing). One surface becomes charged positively and
the other surface becomes charged negatively. If the materials are
not bonded or grounded, they will eventually accumulate a
sufficient electrical charge capable of producing a static spark that
could ignite flammable vapors, gases and dusts. Some common
processes capable of producing a static ignition are as follows:
• The flow of liquids (for example, petroleum or mixtures of
petroleum and water as well as any flammable fluids) through
hose, pipes or fine filters.
• The settling of a solid or an immiscible liquid through a liquid
(e.g. rust or water through petroleum).
• The ejection of particles or droplets from a nozzle (e.g. water
washing operations or the initial stages of filling a tank with oil).
• The vigorous rubbing together and subsequent separation of
certain synthetic polymers (e.g. the sliding of a polypropylene
rope through PVC gloved hands).
Preventing and/or dissipating static electricity as an ignition source
can be accomplished through bonding, grounding or possibly
selecting a different non-static conducting material. Bonding is the
process of connecting two or more conductive objects together by
means of a conductor. Grounding, or earthing, is the process of
connecting one or more conductive objects to the ground.**
Certain Thermoid hose incorporates a static wire, which if properly
coupled can be used to ground the hose assembly. Other parts of
the application or equipment may have to be grounded as well. Hose
that does not contain a ground wire will nevertheless have to be
grounded if used in an explosive or hazardous atmosphere. In all
applications, it is the user’s responsibility to ensure the hose
assembly and equipment it is used on, is properly grounded to earth.
** Excerpts from Process Safety Handling Hazardous Chemicals, 1/97: Standards &
Guidelines – Occupational Safety and Health Administration.
Properties of Saturated Steam
(Abridged from Handbook of Chemistry and Physics – 39th Edition.)
* Based on an atmosphere pressure of 14.7 psi.
Gauge *Temperature of
Pressure Saturated Steam
(psi) (°F)
10 239
25 267
30 274
35 281
40 287
45 292
50 298
55 303
60 307
65 312
70 316
75 320
80 324
85 328
90 331
95 335
100 338
105 341
110 344
115 347
120 350
125 353
130 356
135 358
140 361
145 363
150 366
Gauge *Temperature of
Pressure Saturated Steam
(psi) (°F)
155 368
160 371
165 373
170 375
175 377
180 380
185 382
190 384
195 386
200 388
205 390
210 392
215 394
220 395
225 397
230 399
235 401
240 403
245 404
250 406
255 408
260 409
265 411
270 413
275 414