ENVIROTUBES | Geotextile Tube Capacity Chart

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Dean Wickoren
ENVIROTUBE Technical Director
Industrial Fabrics, Inc.

dean@envirotubes.com
913-221-5345 (mobile)

Resume and Accomplishments (over 40 years experience)

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Capacity Chart

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Hanging Bag Test

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Capacity Chart

How much material can be pumped into the tube with each pumping is determined by measuring the height of the tube. How many times the tube can be pumped is determined by measuring the stretch of the fabric. If the tube is not pumped over the safe height the tube may be pumped many times. The capacity of the tube can be determined by using the capacity chart and the hanging bag shrink test. This will give an estimate of how many feet of tube will be needed for a particular job.

The following capacities are the actual displacement of the tube. The shrinkage factor will vary greatly from one material to another. Sand will not shrink from the in situ volume to be dredged. One CY of tube capacity will be needed for each CY of sand to be dredged. Organic or fine grain materials will shrink more than 50%, organic sludge will often shrink 75% to 90%. How much material can be put into a tube will depend on how many times the tube is pumped and how much time is allowed for dewatering. The dewatering time is affected by whether or not a polymer is used, although some materials will not dewater without a polymer being added. The tube releases water faster if not pumped to full height; only pump the tube to full height on the last filling.

Height (ft)	15' (4.75 M) (circumference)		30' (9.1 M) (circumference)		45' (13.7 M) (circumference)
	Gallons	CY	Gallons	CY	Gallons	CY

1	46	0.2	102	0.5	156	0.8

2	80	0.4	191	0.9	296	1.5

3	106	0.5	265	1.3	424	2.1

4	130	0.6	330	1.6	536	2.7

5			393	1.9	624	3.2

6			135	2.2	732	3.6

6 1/2			468	2.3	781	3.9

7*					822	4.1

7 1/2*					894	4.4

8*					900	4.45

	Capacity 1.55 CM per linear M		Capacity 5 CM per linear M		Capacity 10 CM per linear M

	Weight 2.7 kg per linear M		Weight 5.5 kg per linear M		Weight 8.1 kg per linear M

*Above safe efficient height for some materials

The amount of lengthwise grade will affect the capacity of the tube. A 1% grade will lose 1 foot of elevation per 100 ft. on the high end. A 200 ft. tube will lose 2 ft. on the high end. This will average out to a 1 ft. loss on the capacity chart. The height of the tube must be measured at the lowest ground elevation. The laydown width dimension of the 45 ft. circumference tube will be 21 ft. wide when empty, and 18 or 19 ft. when full.