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  4. Copper pipe (covered refrigerant piping) Flare piping set Refrigerant piping only (OK Equipment Co., Ltd.)
Copper pipe (covered refrigerant piping) Flare piping set Refrigerant piping only-K-HF233B
Copper pipe (covered refrigerant piping) Flare piping set Refrigerant piping only-OK Equipment Co., Ltd.

Copper pipe (covered refrigerant piping) Flare piping set Refrigerant piping only
OK Equipment Co., Ltd.

About This Product

■It has been flared and can be installed as is.

・Drain hose Highly weather resistant product with special 2-layer structure. Length 3m with plenty of room. ・Wall cap Φ65, split type wall cap with good workability. ・The flare nut uses a high-strength forged product. Forging processing: A method of heating the material to nearly 800℃ and forming it with a mold. Strong with little distortion due to processing. Product features

■Lineup

・With electric wire and parts ・With parts ・Refrigerant piping only ・With electric wire and parts Regarding the regulations for insulation material specifications according to the Ministry of Land, Infrastructure, Transport and Tourism standard specifications

■Flame retardant

From April 1, 2013, specifications for flame-retardant insulation materials have been stipulated. All of our insulation materials for coated refrigerant piping are flame retardant.

■Thickness of insulation material

From April 1, 2020, regulations have been changed to require the thickness of insulation material for liquid pipes to be 10 mm or more regardless of pipe size. Until now, if the nominal diameter of the liquid pipe was φ9.52 or less, it was possible to use insulation material with a thickness of 8 mm or more, but from now on, the thickness of the insulation material for liquid pipes will need to be 10 mm or more regardless of the pipe size. Covered refrigerant piping Ant nest corrosion and construction precautions

■What is ant nest corrosion?

On rare occasions, ant nest-like corrosion may occur in the copper pipes of coated refrigerant piping. Ant nest corrosion is a unique type of corrosion in which minute corrosion holes occur on the surface of copper pipes and progress inside.The corrosion pattern resembles an ant nest, so it is called "ant nest corrosion." It is said. The general mechanism by which ant nest corrosion occurs is that various organic substances are hydrolyzed to generate carboxylic acids such as formic acid and acetic acid as a corrosive medium. The possibility of the formation of corrosive media is thought to be due to the effects of the following chemical products. ・Formaldehyde contained in brazing flux, lubricating oil, processing oil, etc. ・Antioxidants, pesticides, cosmetics, etc. that contain alcohol-based solvents - Acetic acid contained in edible vinegar and seasonings. It has also been pointed out that environmental factors such as acid rain and condensed water accelerate this corrosion.

■Construction precautions (measures to reduce the occurrence of ant nest-like corrosion)

- Ant nest corrosion occurs more frequently in environments where oxygen, moisture, and corrosive media exist. Please pay attention to the following points when constructing piping. - Completely seal the gap between the insulation material and the copper pipe with caulking to prevent condensation or rainwater from entering. Please be especially careful about the downward piping of the outdoor unit. When brazing copper pipes, do not use antioxidants containing alcohol-based solvents.

  • Product

    Copper pipe (covered refrigerant piping) Flare piping set Refrigerant piping only

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5 Models of Copper pipe (covered refrigerant piping) Flare piping set Refrigerant piping only

Click on the part number for more information about each product

Image Part Number Price (excluding tax) Copper tube outer diameter x wall thickness Piping length (m) Sales unit Delivery date classification Type Packing quantity
Copper pipe (covered refrigerant piping) Flare piping set Refrigerant piping only-Part Number-K-HF233B

K-HF233B

Available upon quote

6.35×0.8, 9.52×0.8mm

3

5 pieces

General

2 types

5 pieces

Copper pipe (covered refrigerant piping) Flare piping set Refrigerant piping only-Part Number-K-HF2335B

K-HF2335B

Available upon quote

6.35×0.8, 9.52×0.8mm

3.5

5 pieces

General

2 types

5 pieces

Copper pipe (covered refrigerant piping) Flare piping set Refrigerant piping only-Part Number-K-HF234B

K-HF234B

Available upon quote

6.35×0.8, 9.52×0.8mm

4

5 pieces

General

2 types

5 pieces

Copper pipe (covered refrigerant piping) Flare piping set Refrigerant piping only-Part Number-K-HF235B

K-HF235B

Available upon quote

6.35×0.8, 9.52×0.8mm

5

5 pieces

General

2 types

5 pieces

Copper pipe (covered refrigerant piping) Flare piping set Refrigerant piping only-Part Number-K-HF237B

K-HF237B

Available upon quote

6.35×0.8, 9.52×0.8mm

7

5 pieces

General

2 types

5 pieces

Click on the part number for more information about each product

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