In this scene, Homelander rams into a chemical tank and fragments it. Black Noir's actor irl is 6'2 or 187.96 cm and in this one shot he's 321 px and his head is 49 px.
(49/321)*187.96=28.6917133956 cm
In this shot, Noir's head is 91 px. The part of the tank that's destroyed has a height of 111 px and a diameter of 634 px. The cap has a height of 100 px and a diameter the same as the tank. The tube on the top has a height of 186 px and a diameter of 173 px. Using cylinders for the tank and tube and a half ellipsoid for the cap and assuming 90% hollowness, you get:
Tank
(111/91)*28.6917133956=34.9975844716 cm
(634/91)*28.6917133956=199.896113108 cm (radius of 99.948056554 cm)
pi*99.948056554^2*34.9975844716=1098339.62214 cm^3
Cap
(100/91)*28.6917133956=31.5293553798 cm
(4/3*pi*31.5293553798^2*99.948056554)/2=208095.721364 cm^3
(186/91)*28.6917133956=58.6446010064 cm
Tube
(173/91)*28.6917133956=54.545784807 cm (radius of 27.2728924035 cm)
pi*27.2728924035^2*58.6446010064=137037.777576 cm^3
Total Volume
1098339.62214+208095.721364+137037.777576=1443473.12108 cm^3
1443473.12108*0.1=144347.312108 cm^3
Destruction
The tank seems to be made of metal so using stainless steel since according to google that's what most chemical tanks are made of, that means a fragmentation of 358 j/cc and a violent fragmentation of 597 j/cc.
Frag: 144347.312108*358=51676337.7347 j (Small Building level)
Violent Frag: 144347.312108*597=86175345.3285 j (Small Building level)