Common Structural Rules - Common Structural Rules for Bulk Carriers and Oil Tankers, January 2019 - Part 1 General Hull Requirements - Chapter 4 Loads - Section 6 Internal Loads - 7 Design Pressure for Tank Testing
7 Design Pressure for Tank Testing
7.1 Definition
7.1.1 The actual strength testing is to be carried out in accordance with Ch 1, Sec 2, [3.8.4]. In order to assess the structure, static design pressures are to be applied.
The design pressure for tank testing, PST, in kN/m2, is to be taken as:
PST = 10 (zST – z)
where:
zST : Design testing load height, in m, as defined in Table 13.
Table 13 : Design testing load height zST
| Compartment | zST |
| Double bottom tanks (1) | The greater of the
following: zST = ztop + hair zST = zbd |
| Hopper side tanks, topside tanks, double side tanks, fore and aft peaks used as tank | The greater of the
following: zST = ztop + hair zST = ztop + 2.4 |
| Tank bulkheads, deep tanks, fuel oil bunkers | The greater of the
following: zST = ztop + hair zST = ztop + 2.4 zST = ztop + 0.1 PPV |
| Ballast hold | zST = zh + 0.9 |
| Chain locker (if aft of collision bulkhead) | zST = zc |
| Independent tanks | The greater of the
following: zST = ztop + hair zST = ztop + 0.9 |
|
Ballast ducts |
Testing load height corresponding to ballast pump maximum pressure |
| where: zbd : Z coordinate, in m, of the bulkhead deck. zh : Z coordinate, in m, of the top of hatch coaming. (1) For double bottom tanks connected with hopper side tanks, topside tanks or double side tanks, zST corresponding to "Hopper side tanks, topside tanks, double side tanks, fore and aft peaks used as tank, cofferdams" is applicable. zc : Z coordinate , in m, of the top of the chain pipe. |
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