These are ISO 10427
API Specification 10D 6th Ed. Mar. 2002 - Specification for Bow-Spring Casing Centralizers - ISO 10427-1;2001.pdf
[url]http://www.4shared.com/document/AzUu8j3x/API_Specification_10D_6th_Ed_M.html[/url]
API RP 10F 3rd Ed. Apr. 2002 - Recommended Practice for Performance Testing of Cementing Float Equipment - ISO 10427-3;2003 (ISO 18165)
[url]http://www.4shared.com/document/MT99lEHB/API_RP_10F_3rd_Ed_Apr_2002_-_R.html[/url]
