Lead instructor Gerry Pierce

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Lead instructor Gerry Pierce
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Hose Testing

• Objectives
• Construction of fire hose.
• Sizes of fire hose (used at WFRD)
• Use and care of fire hose.
• Proper cleaning of fire hose.
• Method of repairing fire hose.
• WFRD Procedures for testing hose.

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History of fire hose

• Fire hose dates back to 1862 it was leather with
  a riveted or sewn seam. This hose leaked badly
  and was prone to rupture when under pressure.
• Brass fittings were used to couple the hose
  sections together
• Suction hose was metal rings with painted sail
  cloth surrounding it for an air tight seal.

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History of Fire hose

• In the late 1800s hose was starting to be made
  out of rubber with a cotton covering for
  protection. This type of hose didnt leak as
  badly but the cotton covering would retain
  moisture and mold easily.

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Construction of modernFire Hose

• Hose has a inner lining mostly made of synthetic
  rubber, for added flexibility and reduced
  friction loss.
• There is a woven Jacket of Nylon or polyester
  fabric, this aids in resistance to molding and
  gives added strength to the rubber lining as well
  as protection. May be color coded for easy
  identification.
• Aluminum couplings are used with rounded rockers
  to avoid being hung on objects as the hose is
  dragged.

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Single Jacket Fire hose

• Single jacket constructions consist of a
  thermoplastic or synthetic rubber liner combined
  with a closely woven textile single jacket. The
  jacket may be a combination of cotton and
  polyester, or 100 synthetic material

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• Double jacket fire hose.
• Double jacket constructions include a second
  closely woven jacket for extra durability, safety
  factor, and higher test pressures. The jackets
  are matched to assure a precision fit to meet
  precise hydrostatic test requirements.

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• NFPA 1961 and 1962.
• ANSI- American National Standards
  Institute.
• UL 19
• All designate and regulate how fire hose is made
  tested and inspected for safety.
• There are approx 38 tests performed ranging from
  varying pressure, Ozone, sun, mildew resistance,
  and durability.

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Sizes of Fire Hose

• 1¾ and 2 ½ inch attack lines are used.
• 3 and 4 inch supply lines are used.
• Booster line may be ¾ or 1 inch.
• Lengths may vary but 50 foot sections are most
  commonly used here.
• 5 inch soft sleeves are utilized for front
  intakes. Usually 15 or 20 foot lengths.

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Care of fire hose

• Care should be taken to keep hose from being
  pinched in closing doors, pulled over abrasive or
  sharp surfaces,
• Use of a hose roller is recommended when hose is
  going to be taken over an edge of a building or
  wall.
• A hose wringer can be used when repacking to get
  air and water out of hose to allow for a flatter
  load.
• When storing hose it should be rolled beginning
  with couplings that have exposed threads.

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Storing

• Can be left hanging in hose towers or rolled and
  placed in an area that is dry, and out of
  sunlight.

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Cleaning

• Hose usually only needs to be cleaned with plain
  water.
• A mild soap may be used to get any oil, or soot
  off.
• If used in hazardous materials, should be
  decontaminated as recommended or disposed of
  properly.
• Jacketed hose should be dry
  before rolled for storage.

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Repairing

• 4 hose can be repaired by department personnel.
• There are proper tools available at the office
• Detailed documentation should be kept on the
  department hose card file.
• Any Jacketed Hose is not considered repairable
  and should be documented when placed out of
  service.

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Repair procedure

• Select area where hose is in need of repair and
  make a square cut on the hose.
• Wipe the inn and outside of the hose to remove
  any residue or dirt.

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Repair procedure

• Remove the bolts and segment collars

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Repair procedure

• Hose will have to be slit to release bond to the
  hub
• Be careful not to gouge the hub with knife while
  cutting or screw driver while prying.

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Repair procedure

• Inspect collars for
• dragging wear
• Cracks
• Scale build up
• Check threads in segments and on bolts as well as
  the socket heads

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Repair procedure

• Scrape heavy build up from hub and use a wire
  brush to fully clean.
• Ensure that hub spins freely in coupling
• Check lock dog for any wear or excessive play

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Inspection

• Inspect gasket for smooth sealing surface and
  flexibility for proper sealing
• Check lugs for wear, cracks, or any deformities.

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Inspection

• Also check slots and lip that lugs connect into.
• Rotate coupling on hub and check for smooth
  operation.
• Can submerge coupling in mild soapy water while
  rotating to clean.

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Repair completion

• Slide hose onto hub only use mild soapy water as
  a lubricant, if necessary.
• Install collars over hose with flat side towards
  coupling.
• Do not lubricate bolt threads

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Repair completion

• Start bolts evenly keeping gaps between collars
  even while tightening.
• Hand tighten bolts then step torque bolts.

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Step torque procedure

• Step torque by starting at 20 foot pounds of
  torque to each bolt.
• Then increase to 25 foot pounds on each bolt.
• Make final torque of 30 foot pounds to each bolt.
• Be sure gap remains the same between collars.

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Torque wrench used for 4 hose repair
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• Stamp I D number in two locations on couplings
  near lugs.
• The smaller number stamps do a better job.
• Stamp a piece of wood first to ensure proper
  positioning.

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Dies for stamping ID numbers
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• New couplings should be torqued to 40 foot
  pounds.
• Reused couplings collars and bolts should be
  torqued to 30 foot pounds.
• Test hose and recheck repaired couplings for hose
  slippage and proper bolt torque.

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• Attention to detail during inspections and
  testing should be taken to ensure reliability
  when pressure is applied during use.

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Hose testing

• Done on an annual basis.
• Should be performed in an area free of debris and
  on a slight incline.
• Should have available markers for marking hose at
  couplings to check for slippage and scribes to
  clearly mark hoses with identification numbers.
• Means for recording hose after test is complete,
  and a form of tagging failed hose with a
  description of why.

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Team work Practicals

• Monday Test Eng or Wag 4
• Tuesday Test Eng 5
• Wednesday - Test Eng or Wag 1
• Friday - Test Wag or Eng 4.

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? ANY QUESTIONS ?