Thermoplastic Tubes for Fuel (Fuel Piping)

Japanese

Main Applications

Mainly used at locations of piping for the passage of fuel (liquid, gas) for automobiles. Extrusion molding of straight and corrugated shapes, and delivery of assemblies with fittings into tubes, are also possible.

Single-
layer

■ For vapor tubes in area around fuel tanks
■ in fuel pump modules
■ in-tank use
■ areas around engines
　*Only tubes with heat resistance

Multi-
layer

■ For vapor tubes in areas around fuel tanks
■ fuel tank main (feed) piping from fuel tank
■ underfloor piping

FeaturesFEATURES

Weight reduction

Mass can be reduced in comparison to metal and rubber hoses, contributing to improved automobile fuel efficiency.

Compliance with
environmental regulations

These products have excellent properties for low permeability of gasoline, and comply with the evaporative control regulations of various countries.

Applicable regulations:
LEV III (USA), CHINA 6 (China), EURO6 (Europe), BS6 (India), etc.

Unrestricted piping
layout design

Since the tubes have thermoplastic properties, they can be bent easily.

Basic Product InformationRequest for documentation

These are thermoplastic tubes made primarily of nylon (polyamide) based material. Aside from standard specifications, we can also respond to match requested sizes, shapes, and properties.

	Single-layer	Multi-layer
Supported Materials	Nylon (polyamide) based	PBN, ETFE, EVOH, etc.
Tube Diameter	Maximum diameter: outer diameter of roughly φ40 Minimum diameter: can be designed according to consultations	Maximum diameter: outer diameter of roughly φ40 Minimum diameter: can be designed according to consultations
Shapes	Straight shapes Corrugated shapes	Straight shapes Corrugated shapes
Properties	Heat resistance *Pressure resistance, pull-out resistance, permeation resistance, etc. can also be supported.	Conductivity Low oligomer properties Low permeability

Application Proposals

■ Thermoplastic tubes in areas around fuel tanks

Can be used in applications for vaporized gasoline (vapor) and liquid gasoline (feed) in areas around fuel tanks.

Advantages

■ Low permeability
■ Conductivity, low oligomer properties
*Depending on the material

■ Underfloor fuel piping

Can be used in applications for vapor piping of underfloor collective piping.

Advantages

■ Weight reduction
■ Cost reduction

Results of Use

Results of use in areas
around fuel tanks

Applications

Thermoplastic tubes for vapor and liquid

We have numerous results of use of thermoplastic tubes in areas around fuel tanks for various automobile manufacturers.

Results of use for pump modules
by all automobile manufacturers

Applications

Corrugated tubes for pump modules

We have results of use by all automobile manufacturers, through pump module manufacturers.

Note that the above are only selected examples, and we are able to produce piping to meet customer needs.
We have many other results of use as well, so please feel free to inquire with us for more information.

Nitta’s Technology

Strengths

Can be molded into shapes that meet customer requests. Can even be applied in difficult pipe arrangements, providing more design freedom.

Since our thermoplastic tubes are extrusion molded with high dimensional accuracy, variations in performance between and within production lots are controlled.

We possess various types of evaluation equipment in addition to SHED (“Sealed Housing for Evaporative Determination” equipment for measuring fuel evaporative gases). We can carry out various types of quality verification internally, allowing us to provide even earlier support for evaluations.

Types of tubes (single-layer and multi-layer)

Single-layer

Versatile uses for piping inside and outside of fuel tanks. Depending on the material, they can also be used in engine rooms or in metal tanks.

Multi-layer

Used outside of fuel tanks.They can be useful in preventing permeation of fuel from thermoplastic tubes.We can also support additional requirements such as prevention of static charge or low oligomers.

Extrusion molding technology and manufacturing

We possess technology to accurately perform extrusion molding on melted thermoplastic to form tube shapes. Fine adjustments of tube inner and outer diameters, and adjustment of wall thicknesses, are also possible.

Forming technology

Tubes can be formed (bent) and processed into desired piping shapes. Since the accuracy of these bending processes is high, they can be useful to eliminate interference during assembly, so our tubes can be applied to routing in narrow spaces.

Assembly processing
technology

We can offer processing techniques such as press-fitting connectors (joints) to both ends of tubes, attaching protectors to tubes, and installing clips.

Connection methods
(proposafor connector attachment, etc.)