Equal tees create a full-size 90-degree branch whose run, outlet and branch share the same nominal pipe size. This category covers elevated-temperature chromium-molybdenum alloy steels and corrosion-resistant nickel alloys for power, refinery, petrochemical, marine and chemical piping.A complete enquiry should identify the material grade, ASME B16.9 edition, nominal size, wall thickness at all three ends, seamless or welded construction, bevel, quantity and documentation. Equal tee describes geometry only; pressure-temperature suitability must be verified against the governing piping code and project material class.