About: http://webisa.webdatacommons.org/98919966

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The manufacturer identifies the welding procedures required in the pressure vessel construction, together with test pieces that are representative of the materials and thicknesses used in the actual vessel.
http://www.w3.org/ns/prov#wasQuotedFrom	thermopedia.com