scope:

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 described below:

Sect. 2 End and Outlet Connections

Threads

Ring-Joint Flanges

Type 6B: 2-, 3-, and 5000 psi (138, 207 and 345 Bar).†

Blind

Integral

Threaded

Welding Neck

Type 6BX: 5-, 10-, 15- and 20,000 psi (345, 690, 1035 and 1380 Bar).

Blind (10-. 15-. and 20,000 psi only)

Integral

Welding Neck (10-,l5-,and 20,000 psi only).

Segmented Flanges

Stainless Steel Ring Grooves

Deep Ring Grooves

Clamp Type Connectors

Sect. 3 Ring-Joint Gaskets

Type R, RX, and BX

Sect. 4 Valves

Flowline

Multiple Completion

Automatic Shutoff

Production Check Valves

Sect. 5 Drilling-Through Equipment

Fittings, Drilling-Through

Adapters or Spools, Drilling-Through

Blowout Preventer Equipment

Sect. 6 Wellhead Equipment

Screwed Equipment

Flanged or Clamped Equipment

Sect. 7 Christmas Tree Equipment

Flow Fittings

Adapters 15,000 and 20,000 psi (1035 and. 1380 Bar)

Test Connections

Flow Control Chokes

Sect. 8 Fluid Sampling Devices

Sect. 9 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 diagrammatically shown in Fig. l.1A, (3) running tools, instruments, etc., into the well bore via the tubing passage.

NOTE: Certain appendixes covering obsolete or discontinued equipment were not included in the twelfth edition of Spec 6A and are now available in a separate document: Bulletin 6A1.

American Petroleum Institute (API) specifications are published as an aid to procurement of standardized equipment and materials. These specifications are not intended to inhibit purchasers and producers from purchasing or producing products made to specifications other than API, and nothing in any API specification 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 be construed as granting any right, by implication 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, warranty or guarantee in connection with the publication of any API specification and hereby expressly disclaims any liability or responsibility for loss or damage resulting from their use, for any violation of any federal, state 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 that the manufacturer has obtained a license to use the monogram and, further, that the product which bears the monogram, conforms to the applicable API specification. However, the American Petroleum Institute does not represent, warrant or guarantee that products bearing the API monogram do in fact conform to the applicable API standard or specification.

†NOTE: 1 Bar = 100 kPa

*The API monogram- AP -is a registered trademark of the American Petroleum Institute.