Handling of Hose

To use a hose in more safety and for a longer time, please make sure to read "Instruction for Use", "Instruction for Plumbing", "Instruction for Hose Storage, "Instruction for Transportation", "Instruction for Maintenance", and "Metal Fixture and Band". We are not responsible for a damage in case you do not comply strictly with these instructions.

Instruction for Use

  • Value of working pressure shall be expressed as maximum working pressure in case that hose is used at 20 degrees C being bent more than its bending radius. Hoses are not suitable for the usage that almost same amount of pressure as its working pressure is continuously applied to a hose.
  • Working pressure is not a maximum working pressure. Use with the following pressure if pressure is continuously applied for a long time.(under normal operation pressure)
    【 General suction hoses 】1/4 or less than each working pressure
    【 WS, WR, WR-S, FC Type 】2/3 or less than each working pressure
  • Refer to each page of hose for its working pressure.Please note that working pressure differs by size even if hose type is same.
  • Hose performance (working pressure, end-of-life period, etc.) is under the influence of ambient temperature, fluid temperature, bending status, combination of metal fixture and band. In case that ambient temperature and fluid temperature are 50 degree C, working pressure will be about 1/2 compared with that when they are 20 degree C.
  • There are some unusable fluids (acid, alkali, solvent, oil, and chemicals) which affects hose material with swelling or cure phenomenon. Refer to the Chemical Resistance Guide for its availability.
    Use with 1/3 of working pressure even if it is available. Especially, never use hose(s) with high concentration acid/alkali or highly explosive and flammable chemicals. It might severely damage a human body if a hose breaks while in use. It might severely damage a human body if a hose breaks while in use.
  • Hose cannot be used being buried in the ground. It might be damaged by earth pressure or the hose material might be deteriorated by bacteria affection in the ground.
  • In case of use at upstroke part of submersible pump, hose might be damaged due to the hammer pressure at the pump down time. Set the pump pressure less than 1/3 of working pressure.
  • Handle slowly and take 3 seconds or more for valve opening and closing not to apply hammer pressure. Hose might be broken due to applying hammer pressure.
  • Hose might be discolored/hardened or cracked by ozone due to material deterioration by ultraviolet of sunlight or fluorescent light.If there is a sign of discolored or cracked hose, exchange it to new one immediately.
  • Use hose as a consumable item.
  • Never use non-food use hose for food use. You might be punished under the provision of law.
  • Never use hose for medical application.You might be punished under the provision of law.
  • Do not use hose as pipe for compressed air.
    It might cause an accident by hose burst depending on use conditions.
  • Please consult us when you use hose for high purity chemical transportation.
    Component of hose might be eluted into fluid.
  • Do not use hose for an application other than specified application (fluid) in this catalog.
  • Used hose should be discarded by disposal rules in each area.
  • Product containing PVC may generate dioxin when incinerated under 800 degree C.

Instruction for Plumbing

  • Consider not to harm human body or surrounding equipment just in case even if hose is damaged at plumbing.
  • Plumb hose with allowance because it can be stretched and contracted by pressure.
    Do not use hose putting in sheathing pipe or side ditch. Hard part of hose might be damaged and water leakage might happen due to the hose stretch. In addition, protect hose with cushion or protection tube, etc. if a hose contacts with equipment(s) or others due to its stretching and contracting, or its swinging.
  • Hoses are consumable goods. As a hose is used for a certain period, it gradually deteriorates. Exchange the hose to new one immediately in case there is a defect or the sign.
  • In case a hose is used fixing the both ends , use it under 1/2 of working pressure.
    In such case, bending radius of the hose might be shortened in part and it might be damaged due to stretch by pressure.
    We recommend to use high pressure hose such as WS, WR, WR-S, or FC type which can not be stretched so much even under pressure.
  • Hose life might be significantly shortened if you use a hose bending it with shorter bending radius than that specified in this catalogue as bending radius.
  • In case that hose is used being extremely bended near the metal fixture, the hose life might be significantly shortened. Plumb a hose making 1~2 meters length of straight part near the metal fixture.
  • Do not sling a hose horizontally. It might be broken.
  • Be careful not to make an impact to a hose and not to be trapped under vehicle or the other heavy load.
  • Do not move machine by pulling a hose or do not move machine or vehicle when hose is still connected.

Instruction for Hose Storage

  • Hose should be stored in indoor cool and dark space not to be exposed to direct sunlight or wind and rain.
    If you store a hose outdoors, it might get discolored or deteriorated by ultraviolet, and rainwater or dust might get into the hose.
  • Do not stack hose in piles or do not put heavy load on a hose. Otherwise hose might be deformed.
  • Roll a hose with its bending radius or longer, or put it in straight on flat and smooth surface.
    If hose is extremely bended or stored being put on unlevel surface, it might be deformed.
  • Do not store a hose being touched rubber product. Otherwise it might be discolored.
  • Store a used hose in a flat place avoiding direct sunlight after removing residues inside of the hose as much as possible and washing.
  • Do not remain hose on walkway. It may cause injury by tripping over or stepping.

Instruction for Transportation

  • Do not pull or lug a hose on the ground. It may cause surface damage or hole of hose.
  • Do not throw or impact a hose. It might be broken.
  • When sling up a hose, apply multipoint sling up (Avoid one point sling up).

Instruction for Maintenance

Daily Check

Perform an appearance check before daily use.
In case there is a defect, exchange the hose to a new one immediately, or take measures such as defect removal.

【1】Appearance Check

Stop using a hose immediately and exchange it to a new one if following defects are found.

  • A.Defect near metal fixture
        Stretch in part, swelling, curve, leakage
  • B.External flaw
        External big flaw, crack in hose hard part, cracks at valley between pitches of hose
  • C.Hose defect
        Crack, deformation, breaking, inner swelling and peeling
  • D.Other marked deterioration
        Marked discolor, hardening, swelling, crack, and etc.

【2】Water pressure test

Stop using a hose immediately and exchange it to a new one when a regular test value becomes more than 1.5 times of initial value regarding stretch ablility of new hose under pressure as criteria.
Test must be performed under working pressure.
High pressure beyond necessity may shorten hose life.

  • Test periodically for connection part, coupling part, clamping part and etc. of a hose because they will be loosened during use.
  • We are not responsible if above mentioned instructions are not followed.

Metal Fixture and Band

  • Outer diameter of the nipple which is inserted in a hose should be sub equal or a little longer than inner diameter of the hose.
    In case OD of a nipple is shorter than ID of a hose, an accident such as water leakage or metal fixture detachment may occur.
  • To ensure enough tightness, please read instructions carefully before using commercially available metal fixture or band. Depends on the shape of the fixture or band, working pressure of a hose cannot be maintained or cannot be assembled, so please consult us in advance.
  • Please consult us for supply metal fixture beforehand in the same way as the above mentioned paragraph.
  • Please note that heavy duty of a hose may change depending on type of hose band, number of hose band, and clamping force.
  • When the material of a nipple or a contact substance is synthetic resin, hose component might move into and the nipple or contact substance might be deteriorated or color might be changed. So please evaluate adequateness enough or consult us.

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