| Special Focus MAINTENANCE AND RELIABILITY In Hydrocarbon Processing's HPI Market Data 2022 report, the editors forecast global maintenance spending to reach nearly $70 B. Maintenance and reliability are imperative to keep refineries and petrochemical plants operating with the utmost efficiency. Therefore, a maintenance program should not be seen as an expense, but as adding value to operations. This month's Special Focus section explores innovative methods and programs to keep facilities operating at optimal performance. Photo: Plant operators take a safety walk at BASF's 90,000-tpy acetylene plant at the company's Ludwigshafen Verbund site in Germany. Photo courtesy of BASF.