The preheaters shall be of stainless steel or other equally corrosion-resistant material, cleanable, accessible for inspection and shall be equipped with automatic temperature controls.
Ill. Admin. Code tit. 77, § 785.515
The preheaters shall be of stainless steel or other equally corrosion-resistant material, cleanable, accessible for inspection and shall be equipped with automatic temperature controls.
Ill. Admin. Code tit. 77, § 785.515