Pipes And Unions Flashcards by Georgia Hendry

What are aircraft fluid lines made of

Metal tubing or flexible hose

How well did you know this?

Not at all

Perfectly

What are the 3 parts of tubes

Two end fittings

Tube

How well did you know this?

Not at all

Perfectly

What are the dimensions of tube determined by

The external diameter (1/8)

Wall thickness

How well did you know this?

Not at all

Perfectly

What is the high pressure of a rigid pipe

Over 1500 psi

How well did you know this?

Not at all

Perfectly

What is the medium pressure of a rigid pipe

Under 1500 PSI

How well did you know this?

Not at all

Perfectly

What is the low pressure of a rigid pipe

Suction and return lines

How well did you know this?

Not at all

Perfectly

How is a pipe identified

Stencilled or stamped

How well did you know this?

Not at all

Perfectly

What is on a pipe stamp

Drawing number or part number 
Inspection stamp 
Test stamp 
Date of manufacture 
Identification system

How well did you know this?

Not at all

Perfectly

What are the two identification systems

Colour / symbol

Code

How well did you know this?

Not at all

Perfectly

What is a blue / yellow identification label

Hydraulic

Repreating circle

How well did you know this?

Not at all

Perfectly

What is a grey identification label

PHDAN

Physical dangerous substance

How well did you know this?

Not at all

Perfectly

What is a red identification label

Fuel

Repeating star

How well did you know this?

Not at all

Perfectly

What is a green identification label

Oxygen

Repeating rectangle

How well did you know this?

Not at all

Perfectly

What are the 2 pipe connector categories

Flareless

Flared

How well did you know this?

Not at all

Perfectly

What is a MS fitting flareless

Ball bush principle
The sleeve or O-ring of malleable steel is shaped by pre-stressing in such a way that its inner cutting edge is pushed over the pipe to seal it. At the same time the lip of the seal is pushed into the cone of the fitting and forms a seal line. During this the tube must, in principle, be on the stop support.
Don’t over tighten

How well did you know this?

Not at all

Perfectly

What is a Harrison fitting

Flareless
Ball bush fitting
Pipe swaded form a tough seal
Special tools used

How well did you know this?

Not at all

Perfectly

What are the advances of Harrison fitting

Easy to handle
simple tooling
Vibration resistant

How well did you know this?

Not at all

Perfectly

What is a permaswage fitting

A repair method of repairing damaged pipes

Sleeve squeezed on using hydogen driven tool

How well did you know this?

Not at all

Perfectly

What is the advantages of permawage fitting

Light weight
Gives a good seal
Quick

How well did you know this?

Not at all

Perfectly

What is the disadvantage of permaswage fitting

Can not be separated

How well did you know this?

Not at all

Perfectly

two types of flare used in aircraft tubing systems:

Single flare

Double flare

How well did you know this?

Not at all

Perfectly

What is the aircraft flare angle

How well did you know this?

Not at all

Perfectly

What is a vehicle type flare angle

How well did you know this?

Not at all

Perfectly

What must you have before you can flare

A clear surface

How well did you know this?

Not at all

Perfectly

What to do if you see a lean in flare

Dismantle and check | Don’t over tighten

What is an impact tool used for

Single flare Plungerd or hammered in Plunger rotated to give 37 angle

What is a rolling action

``` Creates a single flare A self contained unit No hammering Flaring cone turned inti to pipe Preferred ```

What sized aluminium tube can be flared

3/8 inch or smaller

What are the advantages of double flare

Smother More concentric Gives a better seal More durable

What is sharp bottom damaged pipe

Loss of material damage cuts into material to form | Scratches

What is round bottom damage

Loss of material damage at the bottom is not shap edges but rounded

What is round bottomed impact damage

Dent in the pipe walling

What are the requirements of flexible hoses

An amount of slack required Length reduces by 2-4 under pressure Not twisted when tightened

What are the uses of flexible house

Connect stationary to dynamic

What are the rating of flexible house

Low up to 600 psi Medium up to 3000 psi High 3000 plus psi

What is a lay line

Along the length of flexible hose Twist indicator Yellow red or white

What is the inner hose

Carries fluids and must be chemically compatible

What mater inner house used for petrol

Neoprene and buna-N

What is the inner layer fir hydraulic

Butyl

What are hose reinforces with

``` Cotton rayon polyester carbon steel stainless steel wire braid Protective outer cover ```

What do you inspect in a hose

Applicable Length Cleanliness Damage

What do you check in hose

Part number Cure and assembly Clensily ness

When must hose be supported

At least every 24 inch

What can replace a pipe bend

Elbow

What type of hose bend is preferred

A large bend

What protective sleeves are used

Heat shrink Nylon spiral wrap Teflon

What is a D on a hydraulic fittings

Aluminium alloy

What is a union with no marking

Cadmium plating

What is an S on a union

CRES

What angle does a AN fitting have

Dose a AN fitting have a shoulder

Yes

What types of thread dose a AN fitting have

Coarse

What colour is an AN fitting

Blue or black

What length of body dose a AN fitting have

Long

What angle is a AC fitting

Dose a AC fitting have a shoulder

What type of thread does a AC fitting have

Fine

What colour is an AC fitting

Grey or yellow

What type of body length does a AC fitting have

Short

What is the most common AC or AN

What are the adavangas of fuel fittings

Easy quick Less fuel vapour less hazard

When is flexible hose used

When it is subject to vibration

What type of tube is Harrison fitting suited for

Thin walled

How do you double flare

Inserted into the flaring tube The upsetting tool is inserted Initial upset is formed A flaring tool is inserted into and hammered till a 2nd flare is formed

What happens If a damaged pipe is not described in the manual

The damage is not permitted

Why is a Teflon tube used

Compatible with almost every fluid carried

What is hose outer cover made of

Rubber impregnated fabric or stainless steel braid

What is MS

Flareless

What is AN

Flared

What is the difference between AN and MS fittings

The manner in which the hydraulic tube fits to the fitting.

What are the advantage of quick disconnect couplings

Ease Speed Elimate vapour loss

How do you know when screw type is engaged

Clicking noise