Pipe Patching

Question 1

Different Types of Pipe Damage?

Answer 1

Simple Rupture
Compound Rupture (protruding edges)
Elbow Rupture

Question 2

What are these 3 ruptures?

Answer 2

Simple Rupture
Compound Rupture (protruding edges)
Elbow Rupture

Question 3

What are these 2 ruptures?

Answer 3

Compound Rupture (flange)
Severed Pipe

Question 4

What type of patching is this?

Answer 4

Jubilee Patch

Question 5

What are the benefits of Jubilee patching?

Answer 5

Quickest temporary patch
Holds 100+ psi
Fits 1 size pipe
Source need not be secured
NO Flammables - Spray

Question 6

What type of patch is this?

Answer 6

Band-it Patch

Question 7

Band-it Patch?

Answer 7

A.K.A. Metal Clamping Tool
Steel bands
Clamping tool
Steel buckles
OR USE VICE GRIPS/CHAIN
<250 Deg F, Pressure varies

Question 8

What type of patch is this?

Answer 8

Band-it Patch

Question 9

What type of patch is this?

Answer 9

Soft Patch

Question 10

Soft Patch?

Answer 10

THE Primary Temp. Patch
Holds up to 150 psi
Isolate rupture if possible

Question 11

What type of patch is this?

Answer 11

Soft Patch

Question 12

What type of patch is this?

Answer 12

Soft Patch

Question 13

EWARP?

Answer 13

Emergency Water Activated Repair Patch
Aka. Syntho-Glass
Not in NSTM 079 V2 R3
Not for Pot Water, Flammables
PPE = Glasses, Rubber Gloves
<150 psi <300deg F
20 sec soak time
30 min cure time

Question 14

What type of patch is this?

Answer 14

EWARP

Question 15

Application Procedure for EWARP?

Answer 15

1. Secure System
2. Clean and Roughen Area
3. Don PPE, open pouch
4. Soak in Warm Water (20 sec)
5. Wrap Several Inches Beyond
6. Sets (hardens) in -30min

Question 16

What type of patch is this?

Answer 16

Clamp patch

Question 17

Clamp Patch?

Answer 17

Temporary patch for low pressure piping systems
2 types:
Wooden Block (stockade)- <150 psi
Bolt-type Hangar Clamp-Forged Steel for HP Systems

Question 18

How do you handle a severed pipe?

Answer 18

Low pressure systems can be plugged with wooden plugs wrapped in cloth.
Plugs have a tendency to back out and should be shored in place or a hole drilled in the pipe to allow pin to be driven in.
May be necessary to break the pipe at a flange and bolt on a blank.

Question 19

Pipe Jumper Hose System (PJHS)?

Answer 19

Provides a means to make temporary emergency cold pipe repairs in minutes. Ideal to quickly repair hydraulic lines, chilled water lines, fuel lines, fire protection systems, the firemain and compressed air systems.
Features include:
1. Installs with simple hand tools.
2. Operates at pressures to 4,000 psi (275 bar).
3. Operates at temperatures from 0-200F
4. Allows pipe jumpering up to 40 feet.
5. Available in kitted stowage for easy accessibility.
6. Repairs standard pipe sizes from 1/4-inch to 2 1/2-inch IPS/NS.
7. Provides a cold repair solution; no welding required.

Question 20

What type of system is this?

Answer 20

Pipe Jumper Hose System (PJHS)

Question 21

How do you fix a hole?

Answer 21

Put something in it, or put something over it

Question 22

What is this?

Answer 22

Wooden Plugs

Question 23

Wooden Plugs?

Answer 23

Most simple method
Unpainted- absorbs & grips better
Wrap w/ Cotton prior to insertion
Fill gaps w/rags, small wedges, etc.

Question 24

Mattress and Pillows?

Answer 24

Effective for large holes
Innerspring preferred
Shore in place
Mattresses or Pillows can be wrapped around plugs

Question 25

What type of patch is this?

Answer 25

Box Patches

Question 26

Box Patches?

Answer 26

Up to 18 inches square and 6 pinches deep Used when jagged edges protrude inward Open end has a gasket Shore in place, may be welded in place after shoring

Question 27

Bucket Patch?

Answer 27

Can be inserted bottom first like a metal plug or stuffed with rags and used like a box patch Can be secured by shoring or by using a hook belt

Question 28

Cracks?

Answer 28

Drill 1/4 inch holes at the extreme ends of cracks to prevent spreading. Use Marlin, Oakum and Rags to Caulk cracks. Wedges may spread cracks. Plates may be welded over cracks

Question 29

What type of patch is this?

Answer 29

Cloth Patch

Question 30

Cofferdams?

Answer 30

Stops large holes. An additional bulkhead built around the damaged area.

Question 31

Shoring?

Answer 31

Best way to temporarily support structure until more permanent measures are possible.

Question 32

Objectives for shoring?

Answer 32

a. To reinforce straining bulkheads, doors and hatches against abnormal pressures b. To support damaged and weakened structure and fittings.

Question 33

Reasons for shoring?

Answer 33

Panting - The alternate bulging and contraction of plating (caused by uneven pressure or locked up stresses) resulting in metal fatigue and often accompanied by a groaning or pinging noise. Buckling of deck beams or bulkhead stiffeners Bulging of bukhead or deck plating Fracture or splitting of plating, especially alongside stiffeners or where bulkheads or decks abut hull plating.

Question 34

Principles of shoring?

Answer 34

Use shoring for support only; do not try to restore to original shape. Support the structure properly by spreading pressure over a wide area with a good layout of strongbacks or a shole. Observe shore length limitations Use strong points for shoring anchor points Avoid cross axial stress.

Question 35

Types of shoring?

Answer 35

K type I type

Question 36

What are the EWARP sizes?

Answer 36

3"x11" 4"x16"

Question 37

What is the cure time for EWARP?

Answer 37

30min

Question 38

What is the PSI for Jubilee (soft patches)?

Answer 38

296psi

Question 39

What is the final step for patches?

Answer 39

OPTEST