Large process vessels operating under extreme temperature and pressure conditions are normally clad/ lined with materials like stainless steel, aluminium, nickel & its alloys, copper & its alloys and titanium. The cladding thickness is generally about ______________ percent of the total thickness?
(A) 1 to 5
(B) 10 to 20
(C) 30 to 40
(D) 40 to 50

