Decoding a Hydraulic Hose Layline

Kyri McDonough | June 5th, 2017

The following content has been reposted with permission from Parker Hannifin

Have you noticed all the writing on your hydraulic hoses? To most people it looks like a bunch of words, to others it is an indispensable source of information about hose identification. The layline runs the length of the hose with information to assist in the re-ordering of an existing hose.

The table below breaks down the hydraulic hose layline to help you understand each section and its significance.

Layline sample

Parker Layline Sample | Cross Company

Layline Section Identifier Details
Parker GlobalCore | Cross Company Manufacturer Designation

Parker Hannifin

GlobalCore Hose Family

Parker Layline Part Number Example | Cross Company

Hose Part Number

Hose Size Inside Diameter

Industry Standards

The part number is 797ST

Dash-size is -6 (10 mm, 3/8")

Complies with ISO 18752-DC

Parker Layline Approvals Example | Cross Company


Approved for Mine Safety

and Health Administration

Parker Layline Fittings Icon Example | Cross Company

Fitting Icon

Cover Type

Bend Radius

Comopatible with 77 Series Fittings

SuperTough (ST) Cover

1/2 Minimum Bend Radius

Parker Layline Pressure Example | Cross Company


Maximum Working Pressure

42 Mega Pascals (MPa)

6,000 Pounds Per Square Inch (PSI)

Parker Layline temperature Example | Cross Company


Working Temperature Range

-40C to 125C or -40F to 257F

Parker Layline Manufacturing Example | Cross Company

Manufacturing Data

Plant Code

Manufacturing Location - US

Manufacturing Data Code - 1Q 2014

Sometimes you may also see "No-Skive" printed on some of your hoses. No-Skive Hose refers to removing (or shaving) part of the hose cover and/or inner tube prior to attaching hose ends. No-Skive means the hose and fittings are designed to work without this step. Therefore, a No-Skive hose speeds up the time of a hose assembly and there is no additional equipment or clean up needed.

You also may see tag on the hose, which is also used for identification purposes. For instance, you may see a hose with Parker Tracking System (PTS). This innovative system provides fast and accurate product information, speeding up replacement regardless of where or when the original component was created.

The layline can also be used as a visual index when routing and tightening the assembly to ensure the hose is not twisted or kinked. And as we mentioned, the information can be used when re-ordering a hose and when using the STAMP method, which is included in Parker’s HoseFinder app. Knowing what you are looking for will save you time and money while having confidence that you are installing the right hose for your application.

Watch the video below to learn more about decoding hydraulic hose laylines.

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Kyri McDonough

Kyri is a marketing services manager at the Hose Products Division of Parker Hannifin.

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