National Board and ASME Accepted Testing Laboratories

Please contact the applicable facility for confirmation of their ability to test a particular valve. Also, please note that valves usually cannot be tested at both the maximum pressure and maximum capacity limits simultaneously.

For a list of Authorized Observers at a specific facility, please contact the facility directly.

Name/Address	Fluids	Pressure	Size	Capacity
Anderson Greenwood Crosby 901 Co. Rd. 473 El Campo, TX 77437 281.274.4400	Nitrogen Water	1000 psi 1000 psi	8" 4"	10-70000 scfm 5-2000 gpm
BS&B Safety Systems. LLC 7455 East 46th Street Tulsa, OK 74145 918.622.5950	Air	275 psi	4"	2000 scfm
Continental Disc Corp. 3160 West Heartland Drive Liberty, MO 64068 816.792.1500	Air Air Water	200 psi 650 psi 650 psi	4" 4" 4"	7200 scfm 6000 scfm 900 gpm
Elfab Limited  Alder Road, West Chirton Industrial Estate North Shields, Tyne & Wear United Kingdom NE29 8SD +44 (0)191 293 1234	Air	250 psi	2"	2000 scfm
Farris Engineering 10195 Brecksville Road Brecksville, OH 44141 440.838.7690	Air Air Water Water	880 psi 500 psi 600 psi 700 psi	4" 6" 4" 4"	8000 scfm 8000 scfm 165 gpm 1059 gpm
Fike Corporation 704 South 10th Street Blue Springs, MO 64015 816.655.4770	Nitrogen	285 psi	4"	7000 scfm
Framatome GmbH Technical Center - Components Qualification Seligenstaedter, Strasse 100 Karlstein am Main Germany 63791 +49.9131.900.69318	Steam	2600 psi (18 MPa)	2"	63,000 pph (8 kg/sec)
Leser GmbH & Company, KG Wendenstrasse 133 - 135 D-20537 Hamburg, Germany +49.40.25165-100	Air Water	1450 psi 610 psi	16" 16"	24964 scfm 1057 gpm
Oseco, Inc. 1701 West Tacoma Street Broken Arrow, OK 74012 918.258.5626	Air	700 psi	4"	12000 scfm
The National Board of Boiler  & Pressure Vessel Inspectors 7437 Pingue Drive Worthington, OH 43085 614.888.8320	Steam Nitrogen Nitrogen Nitrogen Water	500 psi 580 psi 1100 psi 2025 psi 500 psi	4" 6" 4" 3" 4"	16000 pph 13000 scfm 15000 scfm 5000 scfm 550 gpm
Updated: 8-11-20