Not Logged In, Login,

Tuesday, December 12, 2017

Many tankers converting from single to double hull are for non-petroleum cargoes

There appear to be a significant number of single hull tankers being converted to double hull tankers.

Some of these are petroleum tankers being converted to meet MARPOL Annex I, 13G and 13H requirements - most of them are double-sided tankers.

But a good number are converting because, as from 1 January 2007, the revision of MARPOL Annex II will come into force. This will mean that several products, previously classified as oil-like substances, will now be re-classified as chemicals that are required to be carried in IMO Type 2 tankers. Most of the products involved are vegetable oils, but other products such as methanol are also affected. Vegoils may be carried in Type 2 tankers with double hulls.

Tankers converted (by dwt):

Age/dwt

10-29,999

30-48,999

60-112,000

Total

1970s

73,314

63,665

 

136,979

1980-84

111,135

1,265,393

340,725

1,717,253

1986-89

161,911

314,957

111,809

588,677

1990-98

59,419

270,907

396,574

726,900

Total

405,779

1,914,922

849,108

3,169,809

 Tankers converted (by number):

Age/dwt

10-29,999

30-48,999

60-112,000

Total

1970s

3

2

 

5

1980-84

5

32

5

42

1986-89

8

8

1

17

1990-98

4

7

4

15

Total

20

49

10

79

Out of the 79 vessels on our list as having been converted to double hull, we have the IMO ship type for 39. The list has been compiled from information from various sources and may be far from complete. We would appreciate input from anyone who keeps a record of such information.

Contact: Erik Ranheim