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Notes

46 C.F.R. §§ 154.445–154.449

5 sections in range

§154.445. Design vapor pressure.

46 C.F.R. § 154.445

If the surfaces of an independent tank type B are mostly flat surfaces, the Po must not exceed 69 kPa gauge (10 psig).
Notes, amendments, and revision history

Authority

Authority: 46 U.S.C. 3703, 9101; Department of Homeland Security Delegation No. 0170.1.

Source

Source: CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted.

§154.446. Tank design.

46 C.F.R. § 154.446

An independent tank type B must meet the calculations under § 154.448.
Notes, amendments, and revision history

Authority

Authority: 46 U.S.C. 3703, 9101; Department of Homeland Security Delegation No. 0170.1.

Source

Source: CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted.

§154.447. Allowable stress.

46 C.F.R. § 154.447

(a)
An independent tank type B designed from bodies of revolution must have allowable stresses 3 determined by the following formulae:
(b)
An independent tank type B designed from plane surfaces must have allowable stresses specially approved by the Commandant (CG-ENG).
Notes, amendments, and revision history

Amendments

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]

Authority

Authority: 46 U.S.C. 3703, 9101; Department of Homeland Security Delegation No. 0170.1.

Source

Source: CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted.

Amendments

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]

§154.448. Calculations.

46 C.F.R. § 154.448

The following calculations for an independent tank type B must be specially approved by the Commandant (CG-ENG):
(a)
Plastic deformation, fatigue life, buckling, and crack propagation resulting from static and dynamic loads on the tank and its support.
(b)
A three-dimensional analysis of the stress exerted by the hull on the tank, its support, and its keys.
(c)
The response of the tank and its support to the vessel's motion and acceleration in irregular waves or calculations from a similar vessel.
(d)
A tank buckling analysis considering the maximum construction tolerance.
(e)
A finite element analysis using the loads determined under § 154.406.
(f)
A fracture mechanics analysis using the loads determined under § 154.406.
(g)
The cumulative effects of the fatigue load from the following formula—
Notes, amendments, and revision history

Amendments

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]

Authority

Authority: 46 U.S.C. 3703, 9101; Department of Homeland Security Delegation No. 0170.1.

Source

Source: CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted.

Amendments

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]

§154.449. Model test.

46 C.F.R. § 154.449

The following analyzed data of a model test of structural elements for independent tank type B must be submitted to the Commandant (CG-ENG) for special approval:
(a)
Stress concentration factors.
(b)
Fatigue life.
Notes, amendments, and revision history

Amendments

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]

Authority

Authority: 46 U.S.C. 3703, 9101; Department of Homeland Security Delegation No. 0170.1.

Source

Source: CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise noted.

Amendments

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]