Material issues with the synthetic waste furnace!
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What material is used for synthetic waste boilers?
Use 16MnR. The inlet pipes (the two outlet pipes) of the waste heat boiler are generally made of 10MoWVHb or 12SiMoVNb, while the outlet pipe of the waste heat boiler is made of 15CrMo. Fasteners should be made of 35CrMo
Look for the book \"300,000-ton Synthetic Ammonia Plant – Metal Materials\" on the forum; it contains very detailed explanations.
It’s hard to answer when the moderator asks like this. Since the operating conditions and design parameters are not clear, how can it be determined what material to use? At the very least, it’s necessary to clarify what technology will be used, as well as the operating pressure and temperature
The material of the waste heat exchangers in our unit is as follows: shell side – 20MnMoNi55; tube side – SAF2205/20MnMoNi55
Cylinders and other components made of Q345R (hot-rolled); Q345R (normalized with ultrasonic testing); tube sheets and heat exchange tubes made of 10MoWVNb
The material of the waste heat exchangers in our unit is: 16MnR for the shell side, and 10MoWVNb for the tube side
The above applies to waste heat boilers installed in the middle of the system; generally, the inlet temperature is below 350°C. However, in modern chemical plants, in order to improve energy efficiency, waste heat boilers are placed at the front of the system, generating medium-pressure superheated steam or high-pressure saturated steam. In such cases, the inlet temperature of the waste heat boiler can reach around 450°C, which requires significantly different materials. Material of the front waste boiler: SA213 T12 ； SA516 Gr70 ； Alloy800H ； SA336F1, etc.