IMCA DO16 - Lift Bags

Question 1

Before a lift bag is put into service is requires what by whom?

Answer 1

Function test to SWL by either: DESIGN Category
3 - Chief Engineer
4) - Manufacturer or technical rep.

Question 2

Before used a bag also has to be inspected that it is manufactured to comply with the relevant standard.

Who can do this inspection?

Answer 2

DESIGN Category 3 or 4

3 Chief Engineer
4 Manufacturer

Question 3

Once in service what is the testing schedule of a lift bag?

Answer 3

6 months & 12 months

Question 4

What is in the 6 monthly tests for a lift bag?

Answer 4

Thorough visual:
Body, strops, shackles, master link.

Operation of dump and relief valve

Integrity of hold back and inverter line.

Question 5

Who can perform the 6 monthly inspections on a lift bag?

Answer 5

Design category:
1) Dive sup or LSS
2) Dive tech
3) Cheif engineer / or a
ginger beer.
4) Manufacturer or tech
representing owner

Question 6

What can be done instead of the annual inspection on board?

Answer 6

Sent back to the manufacture / owner for inspection and certification.

Question 7

Can individual components be replaced on a lift bag?

Answer 7

Yes.
As long as they are like for like and come with their own test certificates.

Question 8

What is the information supplied by the certification?

Answer 8

Bag WLL in fresh water
Upthrust < WLL & >95%

Question 9

What is the minimum canopy safety factor to be?

Answer 9

5 : 1

Question 10

What is the minimum safety factor for strops on a lift bag?

Answer 10

7 : 1

Question 11

What is the accepted method of testing?

Answer 11

Drop test.

Question 12

What must bags be marked with?

Answer 12

Unique serial #
Includes: accessories.

Question 13

A bag should be supplied with a certificate stating what?

Answer 13

Serial #
WLL
Manufacturing standard

Question 14

A bag should have a strong point for an inversion line.

True or False

Answer 14

True

Question 15

What is the safety rating on attachment points on a lift bag?

Answer 15

5 : 1

Question 16

After what date is it compulsory for all lift bags to have an inversion point?

Yes even <50 kg….

Answer 16

1st Jan 2018

Question 17

It is recommended that all bags manufactured before 1 Jan 2018 without a inversion line attachment point need what before use?

Answer 17

Risk assessment

Question 18

The pairing of lift bags with suitable
inverter lines should therefore be risk assessed on a case-by-case basis.

True or False?

Answer 18

True

Question 19

In certain circumstances you do not need a hold back.

True or False?

Answer 19

True.

When take the weight out of an object without causing lift.

Question 20

What is considered in the lift plan?

Answer 20

Weight
Bags required
Center of gravity
Position of bags
Mud suction

Question 21

Lift bags have been found to have variations of <20% in stated capacity.

True or False

Answer 21

True.

Something to keep in mind.

Question 22

What are the two types of lift with air bags?

Answer 22

Static (sky hook)

Dynamic (lift and shift)

Question 23

What checks should be made of a lift bag before use? 6 things

Answer 23

Check serial # to cert
Test date
Visual of all components
Visual of stitching
Check dump valve
Check inversion line

Question 24

Hold-back rigging may only be omitted
where a task specific risk assessment demonstrates that uncontrolled movement (ascent or descent) of
the load cannot occur.

True or False

Answer 24

True

Question 25

What kinds of tings need to be inspected before the use of a lift bag?

Answer 25

Serial number and cert In date load test Visual inspection Check dump working Check inversion line

Question 26

When is a spreader bar to be used with lift bags?

Answer 26

With awkward geometries

Question 27

What to be in place before the use of DMA?

Answer 27

Task specific risk plan

Question 28

Static hold back rigging can only be omitted with a risk assessment has been carried out. True or False

Answer 28

True

Question 29

What are the features of an air line? (3)

Answer 29

Restrained at depth, with a working tail. 3/4 turn valve on lance Diffuser on lance

Question 30

When inflating lift bags avoid partial filling of bags. True or False

Answer 30

True

Question 31

What is one of the primary concerns with deflation?

Answer 31

Interference with the DP Bell atmosphere contamination.

Question 32

When in service it is the responsibility of the diving contractor that the bag remains fit for use. True or False

Answer 32

True

Question 33

The maintenance record for a bag should be kept in the PMS True or False

Answer 33

True

Question 34

Any repairs to a bag are to be in accordance with the manufactures instructions. True or False

Answer 34

True