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API SPEC 16C Document Information:
Title
Specification for Choke and Kill Systems
American Petroleum Institute
Publication Date:
Jan 29, 1993
Scope:
PURPOSE. This specification was formulated to provide for safe and
functionally interchangeable
surface and subsea choke and kill systems equipment utilized for
drilling oil and gas wells. Other
parts of the Choke and Kill System not specifically addressed in this
document shall be in
accordance with the applicable sections of this specification.
Technical content provides the minimum requirements for performance,
design, materials, welding,
testing, inspection, storing and shipping.
APPLICATIONS
EQUIPMENT. Equipment, specific to and covered by this specification,
is listed below:
Actuated valve control lines
Articulated Choke & Kill Line
Drilling choke actuators
Drilling choke control lines, exclusive of BOP control lines and
subsurface safety valve control
lines
Drilling choke controls
Drilling chokes
Flexible choke and kill lines
Union connections
Rigid choke and kill lines
Swivel unions
OTHER EQUIPMENT. Other Equipment included in specification, but
covered by other API Specifications
is listed below:
Check valves
Chokes
Crosses and tees
Flanged, studded end and outlet connections
Flow through valves
Hubbed end and outlet connections
Production choke actuators
Ring gaskets
Studs and nuts
Threaded end connections
Valve actuators
SERVICE CONDITIONS. Service conditions refer to requirements for
pressure, temperature and fluid
compatibility as delineated in Section 3, Design Requirements.
Because Choke and Kill Systems are mobile and are moved to different
areas, all service conditions
they may be exposed to cannot be defined in this document. However,
conditions that are consistent
with API Specifications 6A and 16A have been adopted, which define a
sour, moderately corrosive
environment. If severe corrosion, abrasion, temperatures or high
levels of sour gas are expected,
the user and manufacturer shall jointly address the requirements and
determine the suitable product
for the application.
PRODUCT SPECIFICATION
1. This specification establishes minimum requirements for products
listed in Section 1.2.1,
Equipment.
2. Products listed in Section 1.2.2, Other Equipment, that have
requirements established in API
Specification 6A, 16th edition shall have a minimum of product
specification level PSL 3, material
class EE and a Temperature Rating from Section 3.5.2 as appropriate
for Choke and Kill System
applications.
3. Choke and Kill System equipment manufactured prior to the effective
date of this specification
is outside the scope of this document.
DIMENSIONAL UNITS. For the purpose of this specification the decimal
inch system is the standard
for dimensions. Nominal sizes will continue to be shown in fractions.
The Appendix, Section 3 gives
fraction to decimal equivalence. For the purposes of this
specification, the fractions and the
decimal equivalents are equal and interchangeable.
METRIC/SI CONVERSION. Metric system or International System of Units
conversions are listed in
Section 10.1, SI unit dimensions are listed in parentheses alongside
the decimal inch units
throughout the document.
APPENDICES. Section 10 shall not be considered as requirements. The
Appendices are included as
guidelines or information.
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