The second type was a less flexible steel pipe of similar diameter, developed by engineers from the Iraq Petroleum Company and the Burmah Oil Company, known as HAMEL from the contraction of the two chief engineers, H. A. Hammick and B. J. Ellis.
Den anden type var et knap så fleksibelt stålrør af samme diameter, udviklet af ingeniører fra Iraq Petroleum Company og Burmah Oil Company, kendt som HAMEL der var en sammentrækning af de to ledende ingeniørers efternavne, H.A. Hammick and B.J. Ellis.