Metallurgical Principles and Practice of Engineering (PE) Study Guide: Question #36

It Is the Policy of The Minerals, Metals & Materials Society (TMS) to Encourage the Professional Registration of Metallurgical Engineers.
A material for a discharge line to a waste tank in a chemical processing plant is required. The conditions are severe; the aqueous solution pH ranges from 3 to 7, the flow is at high velocity with considerable turbulence and entrained air. The pipe is 12" (300 mm) diameter, and 100 ft (30.5 m) long. Solid particles of sand and other abrasive media can be expected. The temperature is ambient, generally 40 to 100°F (4 to 38C). The discharge pipe can be put in place by gasketed flanges; no welding is required. Thermal and mechanical shock is not expected. Choose the proper material for the discharge pipe.

(A)	A high-silicon cast iron such as "Duriron" (1% total carbon, 1.5% Mn, 0.15% P, 0.15% S, 15% Si, 5% Cr, 1Mo%, 0.5% Cu)
(B)	High-purity copper
(C)	Anodized unalloyed aluminum
(D)	A high-strength-low alloy steel

The information on this page is maintained by the Nellie Luther (natale@tms.org).

Search PE Study Guide TMS Education Page About TMS TMS OnLine