Code of Federal Regulations Title 46. Shipping § 46.154.1735 Methyl acetylene-propadiene mixture

(i) Maximum methyl acetylene and propadiene molar ratio of 3 to 1;

(ii) Maximum combined concentration of methyl acetylene and propadiene of 65 mole percent;

(iii) Minimum combined concentration of propane, butane, and isobutane of 24 mole percent, of which at least one-third (on a molar basis) must be butanes and one-third propane;  and

(iv) Maximum combined concentration of propylene and butadiene of 10 mole percent.

(i) Maximum methyl acetylene and propadiene combined concentration of 30 mole percent;

(ii) Maximum methyl acetylene concentration of 20 mole percent;

(iii) Maximum propadiene concentration of 20 mole percent;

(iv) Maximum propylene concentration of 45 mole percent;

(v) Maximum butadiene and butylenes combined concentration of 2 mole percent;

(vi) A minimum saturated C₄ hydrocarbon concentration of 4 mole percent;  and

(vii) A minimum propane concentration of 25 mole percent.

(i) Two temperature actuated shutdown switches set to operate at 60° C (140° F) or less;

(ii) A pressure actuated shutdown switch set to operate at 1.72 MPa gauge (250 psig) or less;  and

(iii) A safety relief valve set to relieve at 1.77 MPa gauge (256 psig) or less.