"Coverage. This specification covers items of equipment utilized for pressure control systems required during the drilling and production life of a well. Specifically covered are the groups of equipment usually referred to as ring-joint flanges@ ring-joint gaskets@ drilling-??through and flow line valves@ multiple completion valves@ flanged drilling through equipment@ screwed wellhead equipment@ flanged wellhead equipment@ christmas tree equipment@ flow control chokes@ water sampling devices@ segmented . flanges@ and underwater wellhead equipment@ which Include the following types: Sect. 2 Ring.Joint Type 6B: 2@- 3@- and Ii@OOO psi Blind Integral Threaded Welding Neck Type 6BX: 5@-10@-15@OOO??and 20@000 psi Blind (10@- and 15@000 psi only) Integral Welding Neck (l0@'and 15@000 psi only) Sect.3 Ring??Joint Gasket Type R@ RX@ and BX Sect. 4 Valves@ Drilling??Through and Flow-line Flanged andScrewed Sec.5 Valves@ Multiple Completion Flanged@ flow-line@ full-bore gate and plug Sec.6 Drilling-Through Control Equipment Blowout Preventers Fittings@ Drilling-Through Adapters or Spools@ Drilling-Through Sect 7 Screwed Wellhead Equipment Screwed Casing Heads Screwed Tubing Heads Sect.8 Flanged Wellhead Equipment Casing Headas Tubing Headas Crossover Flange's Adapters Sect. 9 Chriatman Tree Equipment Flow Fittings Adapt.en 15@000 psi Test Connection Sect.l0 Flow Control Chokes Adjustable Chokes Positive Chokes Sect. 11 Automatic Shut Off!' Valves Sect. 12 Water Sampling Devices Sect. 13 Segmented Flanges Sect. 14 Underwater Wellhead Equipment Many of the foregoing items of equipment have specific complementary internal dimensions to permit (1) drilling-through@ (2) running and landing a smaller string of pipe as diagTarnmntically sho\71 in Fig. 1.1@ (3) running tools@ instruments@ etc.@ into the well bore via the tubing passage. Policy. American Petroleum Institute (API) specifications nrc published as nn aid to procurement of standnrdizrd equipment nnd mnterials. These specifications arc not intended to inhibit purchasers and producers from purchasing or producing prod?? ucts made to specifications other than API@ and nothing in any API apecification is intended to in any way inhibit the purchase of products from companies not authorized to use the API monogram.?? Nothing contained in any API specification is to he construed as granting any right@ by implica. tion or otherwise@ for the manufacture@ sale@ or use in connection with any method@ apparatus or product covered by letters patent@ nor as insuring anyone against liability for infringement?? of letters ??patent. API specifications may be used by anyone . desiring to do so@ and every effort has been mAde by the Institute to assure the accuracy and reliability of the data contained in them. However@ the Institute makes no representation@ ""'arranty or guarantee in connection with the publication of any API speci. fication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from their use@ for any violationany federal@ atate or municipal regulation with which an API specification may conflict@ or for the infringement of any patent resulting from the use of an API specification. The use of the API monogram is a warranty by the manufacturer to the purchaser thnt the manufacturer has obtained a license to use the mono?? gram and@ further@ that the product which hears the monogram conforms to the applicable API specifi. cation. However@ the American Petroleum Institute doea not repreaent@ warrant or guarantee that prod. ucta .hearin@"" the API monogram do in fact conform to the appIJcable API standard or specification. The API monogram APIa registered trademark of the American Petroleum Inatitute."