Purchasing Guide for Wellhead & Christmas Tree Equipment · 2017. 1. 19. · PQR Procedure Qualification Record PPM Parts Per Million API Specification 6A API Specification 6A (ISO

WORLDWIDE EXPERTISE | GLOBAL STRENGTH

With Reference to API 6A, 20th Edition, Including Changesin NACE MR0175/ISO 15156, 2009 Edition.

Purchasing Guide for Wellhead & Christmas Tree Equipment

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When coupled with Stream-Flo processes, API provisions and customer applications, this booklet is intended to provide insight into API requirements for equipment and quality management systems, and to provide a fundamental approach to the purchasing of equipment for the petroleum, petrochemical and natural gas industries.

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Table of Contents

API Specification 6A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Abbreviated Terms (Some Examples) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1API 6A Applicable Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Significant Differences Between API 19th and 20th Editions . . . . . . . . . . . . . . . 3Hydrostatic Body Test Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Plan-Do-Check-Act . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Continual Improvement of the Quality Management System . . . . . . . . . . . . . . . . 4

Standard Material Applications: Bodies, Bonnets andEnd and Outlet Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Standard Material Property Requirements: Bodies, Bonnets andEnd and Outlet Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Charpy V Notch Impact Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Temperature Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Pressure Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Material Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8API 6A Annex O: Material Class ZZ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8More NACE Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Product Specification Levels (PSL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9PSL Decision Tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

API Marking Requirements and Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Quality Control Requirements: Bodies, Bonnets, End andOutlet Connections, and Hub End Connectors . . . . . . . . . . . . . . . . . . . . . . . . 11Thread Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11Quality Control Requirements for Welding Bodies, Bonnets, and Endand Outlet Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Relative Corrosivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Relative Corrosiveness of Retained Fluids as Indicated by CO2 Partial Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Factors Affecting Behavior in H2S Containing Environments . . . . . . . . . . . . . . . . 13Severity of Sour Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

The API Monogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15Performance Validation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Criteria for Ordering, 20th Edition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16API Order Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

AQL Acceptable Quality Level PR Performance RequirementCRA Corrosion Resistant Alloy PSL Product Specification LevelDAC Distance Amplitude Curve QTC Qualification Test CouponER Equivalent Round RMS Root Mean SquareFEA Finite Element Analysis RL Repair/Remanufacture LevelHAZ Heat Affected Zone Rp Yield Strength

HBW Brinell Hardness Rm Ultimate Tensile Strength

HIP Hot Isostatic Pressing ROE Radius of ExposureHRB Rockwell Hardness Scale B SSV Surface Safety ValveHRC Rockwell Hardness Scale C TC Test CouponNDE Nondestructive Examination UNS Unified Numbering SystemNPT National Pipe Thread USV Underwater Safety ValveOEC Other End Connection WPQ Welder Performance QualificationOEM Original Equipment Manufacturer WPS Welding Procedure Specification

PQR Procedure Qualification Record PPM Parts Per Million

API Specification 6A

API Specification 6A (ISO 10423) is the recognized industry standard for wellhead and christmas tree equipment. It was formulated to provide for the availability of safe, dimensionally and functionally interchangeable wellhead and christmas tree equipment. The specification includes detailed requirements for the manufacture of tubular suspension equipment, valves, and fittings used at the location of oil and gas wells to contain and control pressure and fluid flows.

Abbreviated Terms (Some Examples)

Specification 6A also serves as the reference source for the design of flanged end and outlet connections for use at 2,000 to 20,000 psi maximum rated working pressures and a family of gate valves for use over these same pressure ranges.

This booklet covers the 20th Edition with references to the 19th Edition.

1 2

API 6A Applicable Equipment

1 2

1 Flanged, threaded, other end connectors (OEC) and welded.

2 See API 6A 20th Edition, Annex H

Note: API 6A defines service conditions in terms of pressure, temperature and material class for the well-bore constituents and operating conditions.

Wellhead Equipment Valves & Chokes

Connectors & Fittings

Loose Connectors1

Casing & Tubing Hangers

Other Equipment

• Casing head housing• Casing head spools• Tubing head spools• Cross-over spools• Multi-stage head housing and spools

• Single valves• Multiple valves• Actuated valves• Valves prepared for actuators• Check valves• Chokes• Surface and underwater safety valves and actuators • Back-pressure valves

• Cross-over connectors• Tubing head adaptors• Top connectors• Tees and crosses• Fluid sampling devices• Adaptor and spacer spools

• Weld neck connections• Blind connectors• Threaded connectors• Adaptor and spacer connections• Bullplugs • Valves removal plugs • Mandrel hangers

• Slip hangers

• Actuators• Clamp hubs• Pressure boundary penetrations• Ring gaskets• Running and testing tools2

• Wear bushings2

Pressure Recording Devices - A distinction has been made between pressure measuring and pressure recording devices. A pressure recording device is not considered to be a pressure measuring device unless it is being utilized as both a measuring and recording device.

Removal of Material Class R - API has removed the Material Class R temperature rating. This temperature rating was used for room temperature applications.

Castings no longer permitted for PSL-4 - Material for PSL-4 equipment must be manufactured from wrought products.

Visual Examination Personnel - Added requirements for personnel performing visual examination for acceptance to pass eye exam.

Quality Control Requirements for Welding - This is one of the biggest changes to the API 6A Specification. The table controlling the quality control requirements for welding was re-organized and restructured to categorize welding differently. Welding is now grouped into Pressure-containing, Non-pressure-containing, Pressure-containing repairs, Weld metal overlay - partial, and Weld metal overlay - full overlay. This, along with the changes to the inspection requirements, are a fundamental change in how welding is controlled and monitored.

Design Validation - Terminology changed from Design Verification to Design Validation.

Hard facing and Overlay of Valve-Bore Sealing Mechanisms - The property control requirements for hard facing and the weld overlay of valve-bore sealing mechanisms, choke trim and valve stems have been relaxed.

Hydrostatic Body Test Pressure

WorkingPressureRating

MPa (psi)

End and Outlet ConnectionsNominal Flange Size

mm (in)Line Pipe

andTubing Threads

MPa (psi)

Casing Threadsmm (in)

346 (135/8)and smaller

MPa (psi)

425 (163/4)and largerMPa (psi)

114.3 - 273.1(41/2 - 103/4)

MPa (psi)

298.5 - 339.7(113/4 - 133/8)

MPa (psi)

406.5 - 508.0(16 - 20)MPa (psi)

13.8(2,000)

27.6(4,000)

20.7(3,000)

27.6(4,000)

27.6(4,000)

27.6(4,000)

15.5(2,250)

20.7(3,000)

41.5(6,000)

31.0(4,500)

41.5(6,000)

41.5(6,000)

31.0(4,500) -

34.5(5,000)

51.7(7,500)

51.7(7,500)

51.7(7,500)

51.7(7,500) - -

69.0(10,000)

103.5(15,000)

103.5(15,000)

103.5(15,000) - - -

103.5(15,000)

155.0(22,500)

155.0(22,500) - - - -

138.0(20,000)

207.0(30,000) - - - - -

Significant Differences Between API 19th and 20th Editions

Unlike the changes that were made between the 17th and 19th Editions, the changes in the 20th Edition were relatively minor.

API Table 31

3 4

3 4

Plan-Do-Check-Act

The model of a process-based quality management system illustrates that our customers play a significant role in defining requirements as inputs. Monitoring of customer satisfaction requires the evaluation of information relating to customer perception as to whether the organization has met customer requirements.

The Plan-Do-Check-Act (PDCA) can be applied to all processes:

Plan Establish the objectives and processes necessary to deliver results in accordance with customer requirements and the organization’s policies.

Do Implement the processes.Check Monitor and measure the processes and product against policies, objectives and requirements

for the product and report the results.Act Take actions to continually improve process performance.

Continual Improvement of the Quality Management System

Resource Management

ManagementResponsibility

Measurement,Analysis and

Improvement

information flow

ProductRealization

Customers’Requirements

Customers’Satisfaction

input outputProduct

Standard Material ApplicationsBodies, Bonnets, and End and Outlet Connections

Pressure Ratings MPa (psi)

Part 13.8(2,000)

20.7(3,000)

34.5(5,000)

69.0(10,000)

103.5 (15,000)

138.0 (20,000)

Body a, Bonnet

36K, 45K, 60K, 75K, NSb

36K, 45K, 60K, 75K, NS

36K, 45K, 60K, 75K, NS

36K, 45K, 60K, 75K, NS

45K, 60K, 75K, NS

60K, 75K, NS

flange 60K, 75K, NS 60K, 75K, NS 60K, 75K, NS 60K, 75K, NS 75K, NS 75K, NSthreaded 60K, 75K, NS 60K, 75K, NS 60K, 75K, NS NA NA NA

other c c c c c c c

weldingneck

45K 45K 45K 60K, 75K, NS 75K, NS 75K, NS

blind 60K, 75K, NS 60K, 75K, NS 60K, 75K, NS 60K, 75K, NS 75K, NS 75K, NSthreaded 60K, 75K, NS 60K, 75K, NS 60K, 75K, NS NA NA NA

other c c c c c c c

a If end connections are of the material designation indicated, welding is in accordance with Clause 6 and design is in accordance with Clause 4.

b NS indicates nonstandard materials.c As specified by manufacturer.

Inte

gral

End

Conn

ectio

nLo

ose

Conn

ecto

rs

5 6

API 6A, Table 5

Standard Material Property RequirementsBodies, Bonnets, and End and Outlet Connections

MaterialDesignation

0.2% Yield Strengthmin MPa (psi)

Tensile Strengthmin MPa (psi)

Elongation in50 mm (2 in) min %

Reduction inArea min %

36K 248 (36,000) 483 (70,000) 21 no requirements45K 310 (45,000) 483 (70,000) 19 3260K 414 (60,000) 586 (85,000) 18 3575K 517 (75,000) 655 (95,000) 17 35

Charpy V Notch Impact Requirements(10 mm x 10 mm)

Temperature Minimum Average Impact ValueTraverse Direction J (ft lb)

Temp Class Test Temp °C (°F) PSL 1 PSL 2 PSL 3 and PSL 4K -60 (-75) 20 (15) 20 (15) 20 (15)

L -46 (-50) 20 (15) 20 (15) 20 (15)N -46 (-50) 20 (15) 20 (15) 20 (15)P -29 (-20) - 20 (15) 20 (15)S -18 (0) - - 20 (15)T -18 (0) - - 20 (15)U -18 (0) - - 20 (15)V -18 (0) - - 20 (15)

5 6

API 6A, Table 6

API 6A, Table 7

Temperature Ratings

API 6A, Table 2

TemperatureClassification

Operating Range (min) °C (max) (min) °F (max)

K -60 82 -75 180L -46 82 -50 180N -46 60 -50 140

P -29 82 -20 180S -18 60 0 140T -18 82 0 180U -18 121 0 250V 2 121 35 250X 1 -18 180 0 350Y 1 -18 345 0 650

1 Reference Annex G for details of design and temperature rating of equipment for use at elevated temperatures.

Note: Annex G is not intended as a material selection guide for high temperature use. Some alloys are embrittled after repeated or prolonged exposure to elevated temperatures. Care should be used in selection of alloys for these ratings. If plated or coated materials are used at temperatures greater than 180° C (350° F), cracking potential can be increased.

API Pressure Rating in MPa API Pressure Rating in PSI13.8 2,00020.7 3,00034.5 5,00069.0 10,000

103.5 15,000138.0 20,000

Pressure Ratings

Pressure Rating for Class K to U De-rated PressureMPa (psi) Class X MPa (psi) Class Y MPa (psi)

13.8 (2,000) 13.1 (1,905) 9.9 (1,430)20.7 (3,000) 19.7 (2,860) 14.8 (2,145)34.5 (5,000) 32.8 (4,765) 24.7 (3,575)

7 8

Material Classes

Material ClassMinimum Material Requirements

Body, Bonnet, End &Outlet Connections

Pressure-Controlling Parts,Stems & Mandrel Hangers

AA - General Service Carbon or Low-alloy Steel Carbon or Low-alloy Steel BB - General Service Carbon or Low-alloy Steel Stainless Steel CC - General Service Stainless Steel Stainless Steel DD - Sour Service a Carbon or Low-alloy Steel b Carbon or Low-alloy Steel b

EE - Sour Service a Carbon or Low alloy Steel b Stainless Steel b

FF - Sour Service a Stainless Steel Stainless Steel b

HH - Sour Service a CRAs bcd CRAs bcd

ZZ - Sour Service User Defined User Defineda As defined by NACE MR0175/ISO 15156.b In compliance with NACE MR0175/ISO 15156.c CRA required on retained fluid wetted surfaces only. CRA cladding of low alloy or stainless steel is

permitted.d CRA as defined in Clause 3 of API 6A 20th Edition. NACE MR0175/ISO 15156 definition of CRA does

not apply.

API 6A Annex O: Material Class ZZ

NACE MR0175/ISO 15156 includes provisions for the qualification of materials for a specific sour service application that is outside the parameters defined in that standard by means of testing or documented field history. This can include NACE MR0175/ISO 15156 or the use of materials not addressed in NACE MR0175/ISO 15156. For such sour service applications, equipment may be described and marked as Material Class ZZ.

It is the responsibility of the purchaser to evaluate and determine the applicability of the documented data for the intended application. For Material Class ZZ, the manufacturer shall meet material specifications supplied or approved by the purchaser and shall maintain traceable records to document the materials of construction, regardless of PSL.

More NACE Information

Material Classes DD, EE, FF and HH require compliance to NACE MR0175 / ISO 15156 and responsibility for the choice rests with the purchaser.

Examples of DesignationsClass FF-1.5 means:a) Material class FFb) Rated at 1.5 psia H2S maximum allowable partial pressure

Class NL means:a) Where no H2S limit is defined by NACE, NL shall be used for marking (i.e. DD-NL).

7 8

Product Specification Levels (PSL)

API Specification 6A (ISO 10423) recommends product specification levels (PSLs) for equipment with quality control requirements for various service conditions. PSLs apply to primary equipment:

• Tubing heads• Tubing hangers, hanger couplings• Tubing head adapters• Lower master valves

All other wellhead parts are classified as secondary. The PSL for secondary equipment may be the same or less

PSL Decision TreeRecommended minimum PSL for primary parts of wellhead and christmas tree equipment.

Rated workingpressure





NACE MR0175?

Gas well?

Gas well?

Gas well?

Gas well?

Start

High H2Sconcentration?

High H2Sconcentration?

≥103.5 MPa(15,000 psi)

>34.5 MPa(5,000 psi)

>34.5 MPa (5,000 psi)

≤34.5 MPa (5,000 psi)

>34.5 MPa (5,000 psi)

≤34.5 MPa (5,000 psi)>34.5 MPa(5,000 psi)

≤34.5 MPa(5,000 psi)

≤34.5 MPa(5,000 psi)

<103.5 MPa(15,000 psi)

yes

yes

no

no

no

no

no

no

no

yes

yes yes

yes

yes

3G

3G

3

3G

3

2

3

2

2

1

3

2

1

PSL

9 10

API Marking Requirements and Locations

Marking

Location

WellheadEquipment

Connectorsand Fittings

Casting andTubing

Hangers

LooseConnectors

Valves andChokes Actuators

API 6A / ISO 10423Nameplate

and/or bodyNameplate


and/or bodyOD of

connectorNameplate


and/or body

Temperatureclass or

rating (4.2.2)

Nameplateand/or body



OD ofconnector


Nameplate and/or body

(actuators containing

retained fluid)

Material class(4.2.3)




OD ofconnector




retained fluid)

Productspecification

level (1.4)




OD ofconnector




retained fluid)

Performance requirement level

(4.1)


-Nameplate

and/or body-



Nominal size(bore if required)

Nameplate or body, and

connector OD


connector OD


OD ofconnector



Thread size(threaded

products only)

Nameplate or body, and/or

near each thread


near each thread

Nameplateand/or

near each connector

OD ofconnector


near each thread

-

End and outlet connector size


eachconnector OD


eachconnector OD

-OD of

connectorNameplate

and/or body-

Rated working pressure (4.2.1)


eachconnector OD


eachconnector OD

-OD of

connector


each connector

OD

-

Ring gasket typeand number

Near each connector

Near each connector

-OD of

connectorNear each connector

-

Date ofmanufacture




OD ofconnector



Manufacturer’sname or mark




OD ofconnector



Serial number(if applicable)




OD ofconnector



Hardness test values

(if applicable)

Adjacent totest location






9 10

API 6A, Table 39

Quality Control RequirementsBodies, Bonnets, End and Outlet Connections, and Hub End Connectors

ParameterSubclause Reference

PSL 1 PSL 2 PSL 3/3G PSL 4Tensile Testing 7.4.2.1.1 7.4.2.2.1 7.4.2.2.1 7.4.2.2.1Impact Testing 7.4.2.1.2 7.4.2.2.2 7.4.2.3.2 7.4.2.4.2Hardness Testing 7.4.2.1.3 7.4.2.2.3 7.4.2.3.3 7.4.2.3.3NACE MR0175 7.4.1.5 7.4.1.5 7.4.1.5 7.4.1.5Dimensional Verification 7.4.2.1.4 7.4.2.1.4 7.4.2.3.4 7.4.2.3.4Traceability - 7.4.2.2.5 7.4.2.3.5 7.4.2.3.5Chemical Analysis - 7.4.2.2.6 7.4.2.2.6 7.4.2.2.6Visual Examination 7.4.2.1.5 7.4.2.1.5

7.4.2.2.7- -

Surface NDE - 7.4.2.2.87.4.2.2.9

7.4.2.3.8 7.4.2.3.8

Weld NDE General

7.4.2.1.6 7.4.2.1.6 7.4.2.1.6No welding permitted except for

weld overlays(see 7.4.2.4.9)

Serialization - - 7.4.2.3.14 7.4.2.3.14Volumetric NDE - - 7.4.2.3.15 7.4.2.4.11

Note: Stems, Hangers and Valve Bore Sealing Mechanisms have their own tables.

STC Casing: short threadLC Casing: long threadBC Casing: buttressXL Casing: extreme lineLP Line pipeNU Tubing: non-upsetEU Tubing: external upset

Thread Markings

The thread type marking in accordance with ISO 11960 shall be as follows:

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API 6A, Table 17

Quality Control Requirements for Welding Bodies, Bonnets, and End and Outlet Connections

Weld Type Stages PSL 1 PSL 2 PSL 3/3G PSL 4Pressure-containing Preparation

VisualCompletion Visual Surface NDE Volumetric NDE Hardness test

-

----

-

7.4.2.2.117.4.2.2.127.4.2.2.14

-

7.4.2.1.5

7.4.2.2.117.4.2.3.117.4.2.3.127.4.2.3.13

no welding permitted

Non-pressure containing

Preparation VisualCompletion Visual Hardness test

-

--

-

7.4.2.2.11-

7.4.2.1.5

7.4.2.2.117.4.2.3.13


Pressure containing repairs

Preparation Surface NDECompletion Visual Surface NDE Volumetric NDE Hardness test

-

----

7.4.2.2.13

7.4.2.2.117.4.2.2.127.4.2.2.14

-

7.4.2.2.13

7.4.2.2.117.4.2.3.117.4.2.3.127.4.2.3.13


Weld metal overlay - partial overlay

Preparation Surface NDECompletion Surface NDE

-

-

-

7.4.2.2.12

7.4.2.3.8

7.4.2.3.11

7.4.2.4.8

7.4.2.4.8Weld metal overlay - full overlay

Preparation VisualCompletion Visual Surface NDE Volumetric NDE

7.4.2.1.5

7.4.2.2.117.4.2.2.12

-

7.4.2.1.5

7.4.2.2.117.4.2.2.12

-

7.4.2.1.5

7.4.2.2.117.4.2.3.117.4.2.1.7

7.4.2.1.5

7.4.2.2.117.4.2.4.87.4.2.1.7

Note: “Preparation” refers to surface preparation, joint preparation, fit up and preheat. “Completion” refers to all welding, post-weld heat treat and machining, except for volumetric

NDE, which shall done prior to machining that would limit effective interpretation of results.

11 12

API 6A, Table 18

Relative Corrosivity

There are many factors that contribute to the corrosivity of a system. The most prominent of these are:

a) Temperatureb) H2S (Partial Pressure)c) pHd) Chloride ion concentratione) Water production and compositionf ) Types and relative amounts of produced hydrocarbonsg) Oxygen levelsh) CO2 levels (Partial Pressure)

Finally, the purchaser should consider future service of the well when selecting a material class. This should not be limited to anticipated changes in the produced fluids or increased water production with or without increased chloride content, but also should include consideration of operations such as acidification or other well treatments.

Relative Corrosiveness of Retained Fluidsas Indicated by CO2 Partial Pressure

Retained Fluids Retained Fluids Retained Fluids Mpa Retained Fluids (psia)General service Noncorrosive <0.05 (<7)General service Slightly corrosive 0.05 to 0.21 (7 to 30)

General serviceModerately tohighly corrosive

>0.21 (>30)

Sour service Noncorrosive <0.05 (<7)Sour service Slightly corrosive 0.05 to 0.21 (7 to 30)

Sour serviceModerately tohighly corrosive

>0.21 (>30)

Factors Affecting Behavior in H2S Containing Environments

The behavior of carbon and low alloy steels in H2S containing environments is affected by complex interactions of parameters, including the following:

a) Chemical composition, method of manufacture, product form, strength, hardness of the material and its local variations, amount of cold work, heat treatment condition, microstructure, microstructural uniformity, grain size and cleanliness of the material

b) H2S partial pressure or equivalent concentration in the water phasec) Chloride ion concentration in the water phased) Acidity (pH) of the water phasee) Presence of sulphur or other oxidantsf ) Exposure to production fluid

13 14

In defining the severity of the H2S containing environment, the possibility of exposure to unbuffered condensed aqueous phases of low pH during upset operating conditions or downtime, or to acids used for well stimulation and/or the back flow of stimulation acid after reaction should be considered.

Note 1: The discontinuities in the figure below 0.3 kPa (0.05 psi) and above 1 MPa (150 psi) partial pressure H2S reflect uncertainty with respect to the measurement of H2S partial pressure (low H2S) and steel’s performance outside these limits (both low and high H2S).

Note 2: Guidance on the calculation of H2S partial pressure is given in Annex C.Note 3: Guidance on the calculation of pH is given in Annex D.

The cracking behavior of CRAs and other alloys in H2S containing environments can be affected by complex interactions of parameters, including the following:

a) Chemical composition, strength, heat treatment, microstructure, method of manufacture and finished condition of the materials

b) H2S partial pressure or equivalent dissolved concentration in the water phasec) Acidity (in situ pH) of the water phased) Chloride or other halide ion concentratione) Presence of oxygen, sulphur or other oxidantsf ) Exposure temperatureg) Pitting resistance of the material in the service environmenth) Galvanic effectsi) Total tensile stress (applied plus residual)j) Exposure time

These factors shall be considered when using this part of NACE MR0175/ISO 15156 for the selection of materials suitable for environments containing H2S in oil and gas production systems.

0.12.5

3.5

4.5

5.5

6.5

1 10 100 1000

in s

itu p

H

H2S partial pressure, kPa

0

1

2

3

0.3 kPa(0.05 psi)

Key0 Region 01 SSC Region 12 SSC Region 23 SSC Region 3

Severity of Sour Environment• determined in accordance with NACE MR0175/ISO 15156-1 with respect to SSC of a carbon or low

alloy steel

13 14

The API Monogram

In order to receive the authorization for applying the API monogram, Stream-Flo’s facilities and our quality management system are audited, approved and licensed by the American Petroleum Institute. The API monogram and license number are our customers’ assurance that Stream-Flo is in compliance with all the applicable API requirements, and it signifies to our customers that they are receiving good quality products and services.

Performance Validation

The performance requirements apply to all products being manufactured and delivered for service. The performance verification procedures are to be applied to designs of products, including design changes. Verification testing specified is intended to be performed on prototypes or production models.

A design that undergoes a substantive change becomes a new design requiring performance verification. A substantive change is a change identified by the manufacturer which affects the performance of the product in the intended service condition. This may include changes in fit, form, function or material.

Certificate 6A-0053Certificate 6D-0008

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Criteria for Ordering, 20th EditionPressure Class API holds user responsible for choosing classTemperature Class API holds user responsible for choosing classMaterial Class API holds user responsible for choosing classPSL (Product Specification Level) API recommends PSLs to the userPR (Performance Requirement) API requires cycle testing of designs

When ordering, please use this wellhead equipment data sheet.

Well names and location(s):Maximum operating pressure:Anticipated wellhead shut-in pressure:Temperature ranges anticipated:Maximum flowing fluid temperature at wellheadAnticipated composition of produced fluids: CO2 (mg) Chlorides(mg) H2S (mg) otherAnticipated completion or future workover or recovery operations which would affect pressure, temperature or fluid content:New values:Are there any government regulations that apply or must be met by this equipment?If so, which one(s):Water or brine pH:Does NACE MR0175 apply?Will scale, paraffin, corrosion or other types of inhibitors be used?Inhibitor type: Inhibitor carrier: Batch or continuous inhibition?Will acidification be performed? Type of acid:Anticipated production rates: m3/d oil/condensate m3/d gas m3/d sand and water (S&W)Will erosion be a concern? Cause:External coating? Yes type NoInternal coating? Yes type NoDelivery requirements:Special shipping, packing and storage instructions:

Casing Program Top Joint in String Size (OD) kg/m (lb/ft) Grade Connection Total String Bit Size Hanging WT mm (in) daN (lbs)ConductorSurface CasingProtective CasingProduction CasingTubingCompletion Type: single or multiple

For more information, please contact Stream-Flo at (403) 269-5531 or [email protected].

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Well names and location(s): PSL: PR Level: Material Class: Rated working pressure: Maximum operating pressure: Temperature ranges anticipated: Minimum flowing fluid temperature at wellhead: Anticipated completion or future work over or recovery operations which would affect pressure, temperature or fluid content: New values: Are there any government regulations that apply or must be met by this equipment? Yes No If so, which one(s)? Water or brine pH: Will scale, paraffin, corrosion or other types of inhibitors be used? Yes No Inhibitor type: Inhibitor carrier: Batch or continuous inhibition? Will acidification be performed? Yes No Type of Acid: Anticipated rates: m3/d Oil/Condensate m3/d Gas m3/d Sand and Water (S&W) Steam Volume

Will erosion be a concern? Yes No Anticipated cause: External coating? Yes No Type: Internal coating? Yes No Type: Delivery requirements: Special shipping, packing and storage instructions: Anticipated wellhead shut-in pressure: Does NACE MR 0175 apply? Yes No Anticipated composition of produced fluids: CO2: H2S: Chlorides: Other: Other Comments / Information: Casing Program

Top Joint in String

Size (OD) kg/m (lb/ft) Grade Connection Total String Hanging WT Bit Size daN (lbs) mm (in) Conductor Surface Casing Protective Casing Production Casing Tubing

Type of Completion: Single Multiple

For more information, please contact Stream-Flo at (403) 269-5531 or www.streamflo.com

Head Office and Manufacturing Facility4505-74 Avenue

Edmonton, Alberta, T6B 2H5t 780.468.6789f 780.469.7724

Sales and Marketing Office400 Bow Valley Square One

202 - 6 Avenue SWCalgary, Alberta, T2P 2R9

t 403.269.5531f 403.266.3307

United States Wellhead & Valve Business Units8726 Fallbrook Drive

Houston, Texas USA 77064t 713.690.2789f 281.517.0007

Stream-Flo Middle East DMCCUnit 1008, Platinum Tower, Jumeirah Lakes Towers

Sheikh Zayed RoadDubai, United Arab Emirates

PO Box: 2562t +971.4.5520907f +971.4.5520920

www.streamflo.com

Stream-Flo Group of Companies

WORLDWIDE EXPERTISE | GLOBAL STRENGTH

Documents

Purchasing Guide for Wellhead & Christmas Tree Equipment · 2017. 1. 19. · PQR Procedure Qualification Record PPM Parts Per Million API Specification 6A API Specification 6A (ISO