Guide for the procurement of power station equipment. Boilers. Water tube boilers. Section 1: Water tube boilers|Contracts, Electric power systems, Boilers, Design, Verification, Specifications, Electric power stations, Technical documents, Availability, Legislation, Water-tube boilers, Control systems, Purchasing, Consumer-supplier relations, Regulations, Selection, Equipment safety, Occupational safety, Quality assurance, Standards, Operating conditions, Interfaces, Maintenance, Fuels, Access, Life (durability), Performance, Identification methods, Siting, Technical writing, Interchangeability, Tendering, Performance testing