Sandvik receives approval from BPV for SAF™ 2707 HD

Sandvik Materials Technology has received approval from the China Standardization Committee on Boilers and Pressure Vessels – Heat Exchange Branch (BPV) for use of the highly corrosion-resistant SAF™ 2707 HD stainless steel in heat exchanger tubing for refinery hydrotreating around the country.

Work on the project involved the Sandvik SU China Technical Marketing and Refinery Segment teams, with support from the company’s Production Unit in Zhenjiang.

SAF 2707 HD is a high alloy duplex (austenitic-ferritic) stainless steel. With a typical pitting resistance equivalent (PRE) number of 49.2, it has high strength and good ductility. It is also particularly suitable for aggressive diluted and middle range of mineral acid and chloride environments, as well as organic acid environments.

Benefits of the grade include excellent resistance to pitting, stress corrosion and crevice corrosion cracking, excellent corrosion fatigue properties, extremely high mechanical strength, and good weldability.

SAF 2707 HD can extend the life of tubes in refinery hydrotreating units with high ammonium chloride, ammonium hydrosulphide, and hydrochloric acid corrosion rates.

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