Engineering Standard

SAES-A-134 18 January 2018

External Corrosion Protection Requirements
Document Responsibility: Corrosion Control Standards Committee

Contents
1 Scope ................................................................ 2
2 Conflicts and Deviations ................................... 2
3 References........................................................ 2
4 Definitions ......................................................... 4
5 General Requirements ...................................... 5
6 Atmospheric Corrosion Protection .................... 6
7 Corrosion under Insulation
(CUI) Protection ................................................ 9
8 Corrosion under Fireproofing
(CUF) Protection ............................................. 11
9 Soil Corrosion Protection ................................ 12
10 Splash Zone Corrosion Protection .................. 12
11 Corrosion Protection for
Submerged Installations ................................. 13
Revision Summary .................................................. 13

Previous Issue: New Next Planned Update: 18 January 2021

Page 1 of 13
Contact: Sanches Costa, Ricardo N. (sanchern) on phone +966-13-8809426

©Saudi Aramco 2018. All rights reserved.

Document Responsibility: Corrosion Control Standards Committee SAES-A-134
Issue Date: 18 January 2018
Next Planned Update: 18 January 2021 External Corrosion Protection Requirements

1 Scope

1.1 This standard establishes minimum mandatory requirements to control external

corrosion for metallic onshore and offshore pipelines, structures, plant and
platform piping, wellhead piping, well casings, tanks, pressure vessels,
instrumentation, other pressure-retaining devices, and auxiliary equipment.
The external corrosion protection in non-industrial areas is not covered by this
standard.

1.2 This standard covers metallic materials including carbon steel, galvanized steel,
low alloy steel, stainless steel, aluminum and its alloys, and other corrosion
resistant alloys. For materials not covered, contact the Group Leader of
CSD/MED/Corrosion Engineering Group.

1.3 The corrosion control measures specified herein are to be applied during design,
construction, commissioning, operation, maintenance, and repair of such
equipment and structures.

1.4 The corrosion protection of concrete structures is not covered by this standard.
Refer to SAES-Q-001 for onshore and offshore structural concrete protection
requirements or SAES-B-006 for fireproofing concrete protection requirements.

2 Conflicts and Deviations

Any conflicts between this document and other applicable Mandatory Saudi Aramco
Engineering Requirements (MSAERs) shall be addressed to the EK&RD Coordinator.

Any deviation from the requirements herein shall follow internal company procedure
SAEP-302.

3 References

The selection of material and equipment, and the design, construction, maintenance, and
repair of equipment and facilities covered by this standard shall comply with the latest
edition of the references listed below, unless otherwise noted.

3.1 Saudi Aramco References

Saudi Aramco Engineering Procedures

SAEP-302 Waiver of a Mandatory Saudi Aramco Engineering
Requirement
SAEP-357 Fiber Reinforced Plastic Grating Installation Guide

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Document Responsibility: Corrosion Control Standards Committee SAES-A-134
Issue Date: 18 January 2018
Next Planned Update: 18 January 2021 External Corrosion Protection Requirements

Saudi Aramco Engineering Standards

SAES-B-006 Fireproofing for Plants
SAES-H-001 Coating Selection and Application Requirements for
Industrial Plants and Equipment
SAES-H-002 Internal and External Coatings for Steel Pipelines
and Piping
SAES-H-004 Protective Coating Selection and Application
Requirements for Offshore Structures and Facilities
SAES-H-005 Thermal Spray Aluminum Coating by Arc Spray
Process for Structure Materials against
Atmospheric Environment (APCS-30TSA)
SAES-L-109 Selection of Flanges, Stud Bolts and Gaskets
SAES-L-132 Materials Selection for Pipelines, Piping, and
Process Equipment
SAES-L-310 Design of Plant Piping
SAES-Q-001 Criteria for Design and Construction of Concrete
Structures
SAES-X-300 Cathodic Protection of Marine Structures
SAES-X-400 Cathodic Protection of Buried Pipelines
SAES-X-600 Cathodic Protection of Plant Facilities
SAES-X-700 Cathodic Protection of Onshore Well Casings

Saudi Aramco Materials System Specifications

09-SAMSS-107 Qualification and Application Requirements of
Fluropolymer/Ceramic Coatings for Fasteners
12-SAMSS-007 Fabrication of Structural and Miscellaneous Steel
12-SAMSS-023 Fiber-reinforced Plastic (FRP) Grating and FRP
Components

Saudi Aramco Engineering Report

SAER-2365 Saudi Aramco Mothball Manual

Saudi Aramco Inspection Procedure

00-SAIP-74 Inspection of Corrosion under Insulation and
Fireproofing

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Document Responsibility: Corrosion Control Standards Committee SAES-A-134
Issue Date: 18 January 2018
Next Planned Update: 18 January 2021 External Corrosion Protection Requirements

3.2 Industry Codes and Standards

American Petroleum Institute

API STD 510 Pressure Vessel Inspection Code: In-service
Inspection, Rating, Repair, and Alteration
API RP 583 Corrosion under Insulation and Fireproofing

American Society for Mechanical Engineers

ASME B31.8S Managing System Integrity of Gas Pipelines
ASME STP-PT-011 Integrity Management of Stress Corrosion Cracking
in Gas Pipeline High Consequence Areas

ASTM International
ASTM C795 Standard Specification for Thermal Insulation for
Use in Contact with Austenitic Stainless Steel

European Federation of Corrosion

EFC 55 Corrosion under Insulation Guidelines

International Organization for Standardization (ISO)

ISO 9223 Corrosion of Metals and Alloys - Corrosivity of
Atmospheres - Classification, Determination, and
Estimation
ISO 12944-2 Paints and Varnishes - Corrosion Protection of
Steel Structures by Protective Painting Systems -
Part 2: Classification of Environments

NACE International
NACE SP 0108 Corrosion Control of Offshore Structures by
Protective Coatings
NACE SP 0198 Control of Corrosion under Thermal Insulation and
Fireproofing Materials
NACE SP 0204 Stress Corrosion Cracking (SCC) Direct Assessment
Methodology

4 Definitions

Atmospheric Corrosion: A form of corrosion that occurs from moisture associated

with atmospheric conditions.

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Document Responsibility: Corrosion Control Standards Committee SAES-A-134
Issue Date: 18 January 2018
Next Planned Update: 18 January 2021 External Corrosion Protection Requirements

Atmospheric Zone: The zone of the structure, equipment, or piping that extends
upward from the splash zone and is exposed to sun, wind, spray or rain.

Atmospheric Corrosivity Category: Standardized rating of corrosivity of atmosphere

in relation to an annual corrosion effect.

Cementitious Coating: A coating that contains Portland cement as one of its

components and is held onto the applied surface substrate by a binder.

Corrosion under Fireproofing (CUF): External corrosion of piping, pressure vessles,

and structural components resulfing from water trapped under fireproofing.

Corrosion under Insulation (CUI): External corrosion of piping, pressure vessles,

and structural components resulfing from water trapped under insulation.
Chloride External Stress Corrosion Cracking (Cl-ESCC) of austenitic and duplex
stainless steel under insulation is also classified as CUI damage.

Chloride External Stress Corrosion Cracking (Cl-ESCC): External surface-initiated

cracking in austenitic and duplex stainless steels under the combined action of tensile
stress, temperature, and an aqueous chloride environment.

Intumescent Coating: A fire retardant coating that, when heated, produces

nonflammable gases that are trapped by the film, covering them to a foam and thereby
insulating the substrate.

Jacketing: The metallic or nonmetallic protective covering that is applied over

insulation. Also referred to as sheathing or cladding.

Mudline: The ocean floor at the location of interest.

Splash Zone: The zone of the structure that is alternately in and out of the water
because of the influence of tides and wind. The splash zone is defined as the area
between Lowest Astronomical Tide and the maximum High Tide.

Submerged Zone: The surface area of a marine structure that is always covered with
water (subsea) and extends downwards from the splash zone and includes that portion
of the structure below the mudline.

Transition Section: Segment of pipeline or piping where the service changes from
buried to atmospheric.

5 General Requirements

5.1 All metallic equipment and components exposed to an external corrosive

environment, shall be protected from corrosion using suitable corrosion control
methods, as specified herein. Acceptable corrosion control methods includes,
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Document Responsibility: Corrosion Control Standards Committee SAES-A-134
Issue Date: 18 January 2018
Next Planned Update: 18 January 2021 External Corrosion Protection Requirements

but are not limited to coatings, cathodic protection (CP), linings, and material
upgrading (either to corrosion-resistant alloys or nonmetallic materials).

5.2 Guidelines for the selection of environment corrosivity and mandatory

requirements to control corrosion are provided for the following external
environments:
 Atmospheric Corrosion
 Corrosion under Insulation (CUI)
 Corrosion under Fireproofing (CUF)
 Corrosion in Soil
 Corrosion in Splash Zone
 Corrosion of submerged installations

5.3 Normal, Foreseeable, and Contingent Conditions

Selection of appropriate external corrosion control methods shall take all the
following conditions into consideration:

5.3.1 Minimum or maximum foreseeable metal temperature induced either by

the process or environment, and maximum environmental contamination
levels, projected over the entire life cycle of the asset and/or structure.

5.3.2 Start-of-run and end-of-run variations.

5.3.3 Contingent conditions, such as those that may be encountered during

construction, start-up, shutdown, process upset operations, or the failure of
a single component.

5.4 For cases not specifically addressed herein, the Corrosion Engineering Group
Leader, CSD/MED, shall be consulted to determine appropriate external
corrosion protection requirements.

6 Atmospheric Corrosion Protection

6.1 Assessing Corrosivity

6.1.1 The corrosivity category shall be determined using Table 1.

6.1.2 For a quantitative corrosivity category determination, follow the

guidelines of ISO 12944 or ISO 9223. All results shall be submitted to
CSD/MED/ Corrosion Engineering Group for verification and approval.

6.1.3 Upon approval, the quantitative analysis shall be used to determine the
atmospheric corrosivity category for that specific location and shall not
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Document Responsibility: Corrosion Control Standards Committee SAES-A-134
Issue Date: 18 January 2018
Next Planned Update: 18 January 2021 External Corrosion Protection Requirements

be used elsewhere without prior review and approval by CSD.

Table 1 – Atmospheric Corrosivity Categories

Equivalent
Corrosivity Typical Environments
Category from
Category for Saudi Aramco
ISO 12944, Table 1
 Offshore areas
 Onshore areas located less than 3 km
Severely
C5-M from shoreline of the Red Sea
Corrosive
 Onshore areas located less than 1 km
from shoreline of the Arabian Gulf
 Industrial areas with high humidity
(at or above 80%).
 Industrial areas located less than 300 m
from the following:
o water spray (cooling towers or others)
Highly sources,
C5-I o fumes,
Corrosive
o polluted gases (from stacks, pits, or
other sources), or
o corrosive chemicals and emissions
being handled or produced (e.g., sulfur
plants, waste water treatment, water
treatment, reverse osmosis plants)
Mildly All other industrial areas not covered by
C1 to C4
Corrosive above categories.

6.2 Corrosion Control Measures

6.2.1 Metallic surfaces in the abovementioned atmospheric zones shall have a

compatible corrosion-resistant external coating as per Table 2.
For insulated materials of construction, refer to Section 7.

6.2.2 Crevice corrosion of vulnerable areas induced by atmospheric corrosivity

shall be prevented. These areas include the fasteners, flanges, and the
gap between equipment/piping and its supports. Follow the coating
requirements in SAES-H-001, SAES-H-002, and SAES-H-004.

6.2.3 When coating inspection and repairs cannot be properly performed, use
non-metallic sleeves or pads should be considered for piping supports
exposed to corrosive atmospheres especially in offshore environments.

6.2.4 Additional measures shall be taken with piping supports exposed to

corrosive atmospheres such as anti-corrosion grease, additional coating,

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Document Responsibility: Corrosion Control Standards Committee SAES-A-134
Issue Date: 18 January 2018
Next Planned Update: 18 January 2021 External Corrosion Protection Requirements

insulating spacer or special pipe support rods shall be applied as per

SAES-L-310, SAES-L-410, and/or NACE SP 0108.

Table 2 - Applicable Coating Requirements

for Different Non-insulated Materials of Construction
Corrosivity Category
Materials of
Construction Mildly Highly Severely
Corrosive (C1 to C4) Corrosive (C5-I) Corrosive (C5-M)
SAES-H-001 SAES-H-001
Carbon and Low
(note 1) and (note 2) and SAES-H-004
Alloy Steel
SAES-H-002 SAES-H-002
No coating
Galvanized Steel SAES-H-001 SAES-H-004
required
Austenitic Stainless
No coating SAES-H-001 and
Steel (300 series) SAES-H-004
required (note 4) SAES-H-002
(note 3)
Nickel-Chromium
No coating SAES-H-001 and
Alloy (Alloy 20, Alloy SAES-H-004
required (note 4) SAES-H-002
825 and Alloy 904L)
Super Austenitic No coating No coating No coating
Stainless Steel (6-Mo) required required required
Duplex Stainless No coating SAES-H-001 and
SAES-H-004
Steel (note 5) required SAES-H-002
Super Duplex No coating No coating No coating
Stainless Steel required required required
Nickel-Based Alloys No coating No coating No coating
(note 6) required required required
Aluminum-Based No coating
SAES-H-001 SAES-H-004
Alloys required (note 7)
No coating
Copper-based Alloys SAES-H-001 SAES-H-004
required
Notes:
(1) Coating materials selection shall follow SAES-H-001, Section 7.1A. However, remaining
standard requirements shall be followed where applicable.
(2) Coating materials selection shall follow SAES-H-001, Section 7.1B. However, remaining
standard requirements shall be followed where applicable.
(3) As per latest version of SAES-L-132, solid austenitic stainless steel type 304/304L is not
permitted for piping and/or process equipment. However, if present in existing operating
facilities; then, the facility Inspection Unit shall develop a plan to adequately inspect for
external corrosion and/or Cl-ESCC of stainless steel types 304/304L, 321, and 347 piping
and/or equipment until they are properly coated and/or replaced. This is regardless of the
atmospheric corrosivity category or operating temperature.
(4) If austenitic stainless steel, Alloy 20 and Alloy 825 components that may operate above
250°F (121°C) can get wet from deluge system testing, fire water, or other sources during
downtime; then, protective coating shall be applied. During start-up, these wetted
components may suffer from Cl-ESCC.
(5) Except for lean duplex stainless steel containing no molybdenum and a low nickel content
(up to 4.5%). For such alloy, protect similar to austenitic stainless steel (300 series).

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Document Responsibility: Corrosion Control Standards Committee SAES-A-134
Issue Date: 18 January 2018
Next Planned Update: 18 January 2021 External Corrosion Protection Requirements

(6) Except for Alloy 825.

(7) Normally, not coated to resist corrosion. However, coating may be required for reasons of
appearance.

6.2.5 Onshore structural steels shall be galvanized as per 12-SAMSS-007.

Where galvanizing cannot be done after fabrication, uncoated locations
shall be painted and all open ends of structural steel pipes and tubings
shall be sealed, as per 12-SAMSS-007. This is necessary to prevent
internal corrosion due to ingress of corrosive contaminants and moisture.

6.2.6 For grating, handrails and steps, nonmetallic materials as per

12-SAMSS-023 and SAEP-357 should be used.

6.2.7 Bolting material for flange joints installed in highly (C5-I) or severely
corrosive (C5-M) environments defined in Section 6.1, shall be protected
using one of the followings methods as defined in SAES-L-109:

6.2.7.1 Fluoropolymer coating as per 09-SAMSS-107 requirements

6.2.7.2 Coating the exposed portions of the bolts (and sealing the gap
between flange faces) as per SAES-H-001 or SAES-H-004

6.2.7.3 Corrosion-resistant alloys shall only be used if approved by

Materials Engineering Standards Committee Chairman.

6.2.8 Transformers and radiators in electrical substations, shall be coated in

accordance with SAES-H-001 and SAES-H-004.

6.2.9 Austenitic stainless steel (300 series) fasteners shall not be used to
connect cable trays in highly (C5-I) or severely corrosive (C5-M)
environments.

7 Corrosion under Insulation (CUI) Protection

7.1 All insulated metallic surfaces shall have a compatible corrosion-resistant

external coating as per Table 3. To determine the Corrosivity Category, refer to
Section 6.1. For non-insulated materials of construction, refer to Section 6.2.

7.2 For insulated Super Austenitic Stainless Steel (6-Mo), Super Duplex Stainless
Steel and Nickel-based Alloys (except Alloy 825), protective coating is not
required regardless of operating temperature. For alloys not listed in Table 3,
refer to Corrosion Control Standards Committee Chairman for guidance.

7.3 Insulation shall not be used for personal protection unless there is no other
solution. Consider insulating paints or protective cages (see the flow chart on
the need for insulation in EFC 55, Section 4).
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Document Responsibility: Corrosion Control Standards Committee SAES-A-134
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Next Planned Update: 18 January 2021 External Corrosion Protection Requirements

7.4 Insulation systems shall be designed to exclude water through effective sealing
of outer jacketing and through the use of non-absorbent, weatherproofing
insulation materials.

Table 3 - Applicable Coating Requirements

for Different Insulated Materials of Construction
Corrosivity Category
Materials of
Operating
Construction Mildly Highly Severely
Temperature
(note 1) Corrosive (C1 to C4) Corrosive (C5-I) Corrosive (C5-M)
10 to 350°F
SAES-H-001 and SAES-H-001 and
(-12 to 175°C) SAES-H-004
SAES-H-002 SAES-H-002
Carbon and (note 2)
Low Alloy Steel < 10°F (-12°C)
No coating No coating No coating
or
required required required
> 350°F (175°C)
Austenitic 122 to 400°F
SAES-H-001 and SAES-H-001 and
Stainless Steel (50 to 204°C) SAES-H-004
SAES-H-002 SAES-H-002
(300 series), (note 2)
Alloy 20 and < 122°F (50°C)
No coating required SAES-H-001 and
Alloy 825 or SAES-H-004
(note 4) (note 5) SAES-H-002
(note 3) > 400°F (204°C)
250 to 400°F
SAES-H-001 and SAES-H-001 and
(121 to 204°C) SAES-H-004
Nickel- SAES-H-002 SAES-H-002
(note 2)
Chromium Alloy
< 250°F (121°C)
(Alloy 904L) No coating SAES-H-001 and
or SAES-H-004
required SAES-H-002
> 400°F (204°C)
250 to 400°F
SAES-H-001 and SAES-H-001 and
(121 to 204°C) SAES-H-004
Duplex SAES-H-002 SAES-H-002
(note 2)
Stainless Steel
< 250°F (121°C)
(note 6) No coating SAES-H-001 and
or SAES-H-004
required SAES-H-002
> 400°F (204°C)
Notes:
(1) If piping is steam traced, then coating shall be applied to protect against corrosion if the system fails.
(2) Coating requirements shall be considered for all metallic components either operating continuously
or intermittently cycling in the indicated temperature range.
(3) Refer to paragraph 7.7.
(4) As per latest version of SAES-L-132, solid austenitic stainless steel type 304/304L is not permitted
for piping and/or process equipment. However, if present in existing operating facilities; then, the
facility Inspection Unit shall develop a plan to adequately inspect for external corrosion and/or
Cl-ESCC of stainless steel types 304/304L, 321, and 347 piping and/or equipment until they are
properly coated and/or replaced. This is regardless of the atmospheric corrosivity category or
operating temperature.
(5) If austenitic stainless steel, Alloy 20 and Alloy 825 components that may operate above 250°F
(121°C) can get wet from deluge system testing, fire water, or other sources during downtime;
then, protective coating shall be applied. During start-up, these wetted components may suffer from
Cl-ESCC.

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Document Responsibility: Corrosion Control Standards Committee SAES-A-134
Issue Date: 18 January 2018
Next Planned Update: 18 January 2021 External Corrosion Protection Requirements

(6) Except for lean duplex stainless steel containing no molybdenum and a low nickel content (up to
4.5%). For such alloy, protect similar to austenitic stainless steel (300 series).

7.5 Additional measures shall be taken with the mechanical design of the insulation
system to minimize the possibility of water ingress. Any protrusions similar to
nozzles, attachments and appurtenances have a high risk of water ingress leading
to CUI, refer to API RP 583, Section 9 and NACE SP 0198, Section 3.

7.6 Thermal Insulation for use in contact with Austenitic Stainless Steel shall use
low leachable chloride insulation as per ASTM C795.

7.7 Projects shall evaluate the use of Thermal Spray Aluminum (TSA) to show
effectiveness and evaluate life-cycle cost in lieu of prior coating options.
The application of thermal spray aluminum coating (TSA) is preferable to
prevent CUI, refer to SAES-H-005 and NACE SP 0198.

7.8 Prior approval of CSD/MED/Corrosion Engineering Group shall be obtained

before the use of Aluminum foil wrapping. It might be an effective barrier and
galvanic anode to prevent CUI of austenitic and duplex stainless steel, refer to
NACE SP 0198 Table 1 System SS-7.

7.9 Establish CUI inspection programs as per 00-SAIP-74.

7.10 If equipment is mothballed, all openings in jacketing shall be sealed off with
suitable tapes or mastics and the system should be inspected periodically in
accordance with the instructions in SAER-2365. If corrosion is detected,
insulation should be removed to access and repair damaged areas followed by
proper insulation replacement.

8 Corrosion under Fireproofing (CUF) Protection

8.1 Steel surfaces that are to be fireproofed with cementitious materials or covered
with intumescent or other proprietary fireproofing (such as lightweight
concrete), shall be coated in accordance with SAES-H-001.

8.2 Galvanized steel that will be covered with intumescent fireproofing materials
shall be coated in accordance with 12-SAMSS-007 and SAES-H-001
requirements.

8.3 Fireproofing must be designed to prevent ingress of water behind the

fireproofing material as per SAES-B-006 requirements.

8.4 Since CUF is often associated with the testing of firewater monitors and
washing down areas, these activities shall be minimized particularly when
seawater is used as firewater. Also, the facility Inspection Unit shall develop a
plan to adequately inspect for CUF.
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Document Responsibility: Corrosion Control Standards Committee SAES-A-134
Issue Date: 18 January 2018
Next Planned Update: 18 January 2021 External Corrosion Protection Requirements

9 Soil Corrosion Protection

9.1 Pipelines, piping systems, equipment and structures that are buried or are in
contact with the soil shall be protected by both external coatings and cathodic
protection regardless of soil corrosivity.

9.2 To evaluate and further mitigate the external SCC threat of pipelines, the
approach described in NACE SP 0204 or ASME B31.8S shall be followed.

9.3 Protective Coatings Requirements

9.3.1 All buried structures and equipment, tanks including tank bottom plates,
piping, valves, anchor bolts and structural steel for onshore piping shall
be coated following the requirements of SAES-H-001.

9.3.2 All buried onshore piping systems, fittings and well casing, shall be
externally coated as per SAES-H-002 requirements.

9.3.3 All transition areas of piping (buried to above ground pipe sections,
including camel and road crossings) shall require additional protection as
per SAES-H-002. Piping shall be protected with the buried service
coating and supplemented with an approved protective system such as
APCS-113A or APCS-113C (with UV resistant outer wrap).

9.3.4 Buried stainless steel piping shall be externally coated with FBE,
halide-free liquid coating as per SAES-H-002 requirements.

9.4 Cathodic Protection Requirements

9.4.1 The extent of external coating application on onshore well casings shall
be determined as per SAES-X-700.

9.4.2 All buried metallic components shall be provided with a CP system

designed and installed in accordance with relevant standards
SAES-X-400, SAES-X-600, and/or SAES-X-700.

10 Splash Zone Corrosion Protection

10.1 All metallic structures exposed to the splash zone are susceptible to external
corrosion.

10.1.1 For legs and other structural members, the splash zone is between -1.8 to
+4.3 m.

10.1.2 For pipeline risers, the splash zone is between -1.8 to +4.6 m or the first
riser flange, whichever is lower.
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Document Responsibility: Corrosion Control Standards Committee SAES-A-134
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10.1.3 For conductors, the splash zone is between -3 to +4.6 m.

10.1.4 For the purpose of maintenance of existing coated structures, the splash
zone is defined as the area between Mean Sea Level and the maximum
High Tide, value is between +0.3 to +2.1 m.

10.2 Protective Coatings Requirements

10.2.1 Structures and critical process components, like jacket members and
risers, shall be protected by sheathing with Alloy 400 through the splash
zones in accordance with SAES-H-004 requirements. For geometrically
complex configurations where Alloy 400 sheathing cannot be used, a
suitable coating can be used as per SAES-H-004.

10.2.2 All remaining structural components shall be protected by coating as per

SAES-H-004 requirements.

10.3 Cathodic Protective Requirements

CP can be used to supplement coatings in the tidal zone portion of the splash
zone. The tidal zone is often considered to be the portion of the splash zone
below the astronomical high tide mark that is intermittently submerged.
Commentary Note:

CP does not provide protection to the portions of the splash zone that are kept
wet due to sea spray or are only infrequently immersed.

11 Corrosion Protection for Submerged Installations

11.1 Protect all water submerged pipelines, piping, valves, fittings, piles, well casing,
equipment and structures, not covered in Section 10, against corrosion by both
external protective coatings as per SAES-H-004 and CP as per SAES-X-300
requirements.

11.2. Offshore oil wells in electrified fields do not need to be coated (not the well
casing nor the jacket). A CP system as per SAES-X-300 alone is sufficient.

Revision Summary
18 January 2018 New Saudi Aramco Engineering Standard.
- To assemble, streamline and clarify existing external corrosion protection
requirements scattered in SAES-L-133, SAES-H-001, SAES-H-002, and
SAES-H-004 for ease of use by Capital Projects and Operating Facilities.
- To enable cost saving mainly in capital projects by minimizing confusion with
regards to what industrial metallic components and structures should or should
not be coated.
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