API 6A

API 6A Basics

Basic Information Found in 6A • • • • • • •

Types of equipment Product Specification Levels (PSL) Performance Requirements Pressure Ratings Temperature Ratings Material Class Ratings Standard and Non-Standard Materials

Types of equipment A) Wellhead equipment: • casing head housings • casing head spools • tubing head spools • cross-over spools • multi-stage head housings and spools B) Connectors and fittings: • cross-over connectors • tubing head adapters • top connectors • tees and crosses • fluid-sampling devices • adapter and spacer spools

Types of equipment C) Casing and tubing hangers: • mandrel hangers • slip hangers D) • • • • • • • •

Valves and chokes single valves multiple valves actuated valves valves prepared for actuators check valves chokes surface and underwater safety valves and actuators back-pressure valves

Types of equipment E) Loose connectors [flanged, threaded, other end connectors (OEC), and welded]: • weld neck connectors • blind connectors • threaded connectors • adapter and spacer connectors • bullplugs • valve-removal plugs F) Other equipment: • actuators • hubs • pressure boundary penetrations • ring gaskets • running and testing tools • wear bushings

Product Specification Levels (PSL) • There are 5 product specification levels. – – – – –

PSL-1 PSL-2 PSL-3 PSL-3G PSL-4

• Selection of PSL is based on potential hazards, and the effect of those hazards on people, the environment, and resources. • The more critical the application, the higher the PSL Level

Product Specification Levels (PSL)

Product Specification Levels (PSL) • PSL 1 is selected when the following conditions exist: – Working pressure is less than or equal to 5000 psi – Product produced is not gas

Product Specification Levels (PSL) • PSL 2 is selected when the following conditions exist: – Working Pressure is greater than 5000 psi for Petroleum Well in a low H2S environment – Working Pressure is less than or equal to 5000 psi for Petroleum Well in a high H2S environment – Working Pressure is less than or equal to 5000 psi for Gas well

Product Specification Levels (PSL) • PSL 3 is selected when the following conditions exist: • Working Pressure is greater than 5000 psi for Petroleum Wells in a high H2S environment • Working Pressure is greater than 5000 psi for Gas Wells in a low H2S environment • Working Pressure is greater than 15000 psi for Petroleum Wells in a low H2S environment

Product Specification Levels (PSL) • PSL 3G is selected when the following conditions exist: • Working Pressure is greater than 5000 psi for Gas Wells for in a high H2S environment • Working Pressure is greater than 15000 psi for in a high H2S environment • Working Pressure is greater than 15000 psi for Gas Wells in a low H2S environment

Product Specification Levels (PSL) • PSL 4 is selected when the intended application exceeds the service conditions usually identified within the scope of API 6A • PSL 4 requirement is normally used only for primary equipment.

Performance Requirements • There are two performance requirement levels: PR1 and PR2. • Performance requirements are a function of part design • Performance Requirements are determined by pressure, temperature ranges, load capability, cycles, and operating force or torque. • Performance verification procedures are found in Annex F of API 6A

Performance Requirements • Performance Requirements are specified for each equipment type in Clause 10 of API 6A • Performance Requirements for specific RasGas equipment is specified in Exhibit B of the Contract

Pressure Ratings • API 6A equipment is designed to operate at only the following maximum rated working pressures: • psi MPa • 2 000 13,8 • 3 000 20,7 • 5 000 34,5 • 10 000 69,0 • 15 000 103,5 • 20 000 138,0

Temperature Ratings • Equipment is designed to operate in one or more of the specified temperature ratings • Minimum temperature is the lowest ambient temperature to which the equipment may be subjected. • Maximum temperature is the highest temperature of the fluid that may directly contact the equipment. • API 6A designated temperature ratings are located in Table 2

Temperature Ratings - Table 2 Temperature Operating Range Classification K L N P R S T U V

C F min. max. min. max. -60 82 -75 180 -46 82 -50 180 -46 60 -50 140 -29 82 -20 180 Room temperature Room temperature -18 60 0 140 -18 82 0 180 -18 121 0 250 2 121 35 250

Material Class Ratings • API 6A provides material classes for increasing levels of severity of service conditions and relative corrosivity of retained fluids • Material selection is partially determine based on various environmental factors and production variables – – – – – – –

temperature; b) H2S level; c) pH; d) chloride ion concentration; e) sand production; f) water production and composition; g) types and relative amounts of produced hydrocarbons.

Material Class Ratings

Standard and Non-Standard Materials • All bodies, bonnets, end and outlet connections shall be fabricated from standard or nonstandard materials as specified in Table 4 of API 6A • There are 5 material sets defined by API 6A – – – – –

36K 45K 60K 75K NS (Non-Standard)

Standard and Non-Standard Materials

Standard and Non-Standard Materials • Standard materials shall meet the applicable properties shown in Table 5.

Standard and Non-Standard Materials • Non-standard material shall conform to the manufacturer’s written specification. • The specification shall include minimum requirements applicable for the specific alloy. – – – – – –

tensile strength, yield strength, elongation, reduction of area, toughness hardness

• All non-standard materials shall exceed a 75K minimum yield strength and meet a minimum of 15 % elongation and 20 % reduction of area.