November 7, 2018

High Pressure MPB-E Elbow Pressure Balanced Expansion Joints for Russian Refinery

Five units High Pressure MPB-E Elbow Pressure Balanced Expansion Joints have been manufactured and shipped to Russia.

The MPB-E Expansion Joints DN300 incorporate:

- Multiply reinforced bellows in Duplex 1.4462 - UNS S31803/S32205

- Reinforcing rings in SS304/304L

- Pipes in P355NL2 (1.1106)

These units have been designed for:

120 barg (1740 Psig) Design Pressure

165 barg (2393 Psig) Test Pressure

-50/+60 °C Operating Temperature

Medium Crude Oil

The steel grade 1.4462 (also called UNS S31803/ S32205 , F51 and SS2377) is a stainless acid resistant duplex steel  with high strength and extremely good corrosion properties. Due to the duplex structure of the steel (austenitic-ferritic) and high contents of chrome and molybdenum it has very high resistance to pitting corrosion, crevice corrosion, uniform corrosion, corrosion fatigue and stress corrosion cracking. It also has high energy absorption and low thermal expansion.