Engineering Standard
SAES-A-400
Industrial Drainage Systems
26 October 2015
Document Responsibility: Industrial Drainage Standards Committee
Saudi Aramco DeskTop Standards
Table of Contents
1 Scope................................................................. 3
2 Conflicts and Deviations..................................... 4
3 References......................................................... 5
4 Definitions........................................................... 7
5 General Requirements....................................... 9
6 Drain Requirements for Specific Applications.. 13
7 Tank Dewatering.............................................. 15
8 Appendices....................................................... 15
Appendix I – Simplified Schematic
of Industrial Drainage Systems........ 16
Previous Issue: 14 April 2014
Next Planned Update: 26 October 2018
Page 1 of 16
Primary contact: Qahtani, Salem M. (qahtansm) on 966-3-8801337
Copyright©Saudi Aramco 2015. All rights reserved.
Document Responsibility: Industrial Drainage Standards Committee
Issue Date: 26 October 2015
Next Planned Update: 26 October 2018
SAES-A-400
Industrial Drainage Systems
SAES-A-400 Revision Log (exclude format or minor edit changes)
# Section
1 1.4
Title
Scope
2 3
References
3 5.5
General
Requirements
General
Requirements
4 5.6
5 5.9
7 6
General
Requirements
General
Requirements
Table
8 6.10
Table
9 Appendix 1
Schematic
6 5.17
Change
Removed reference to Sulfur Recovery Plants exclusion. Sulfur
Recovery Plant CDS is licensor specific so the design is left as an
open art for the sulfur recovery licensor based on evolving best
industry practices
Removed reference to and commentary note on SAES-A-402
because this standard does not exist at this time
Removed OWDS system design conditions. The constraints for
the design of lift station are in OWDS standard (SAES-S-020)
Removed OWLS pump requirements because the requirements are
already in OWDS standard. Also, removed mandate to install
CDS which is in contradiction with cost and risk analysis per
SAEP-125
Deleted because SAES-A-402 does not exist
Added heel recovery requirement which was previously in
SAES-A-401
Added “Toxic” with “Flammable” to emphasize that CDS also
recovers toxic fluid
Removed reference to Bulk Plant because a sump is acceptable.
Updated Note 3 to state that Bulk Plants may use existing sump
but Bulk Plants should use a segregated hydrocarbon piping
network to avoid mixing flammable fluid in OWDS piping
network. The constraints for sump design are in SAES-S-020
Replaced the schematic with a process flow diagram with
symbology for P&IDs
Page 2 of 16
Document Responsibility: Industrial Drainage Standards Committee
Issue Date: 26 October 2015
Next Planned Update: 26 October 2018
1
SAES-A-400
Industrial Drainage Systems
Scope
1.1
The purpose of this standard is to provide general guidelines for the selection of
a proper drainage system to ensure that all liquids can be drained safely with
minimum risk of fire or injury. Full conformance to this standard will ensure
that facility drainage systems are capable of handling draining during both
normal operations and during maintenance, and turnaround and inspections
(T&I). Specifically, this standard provides general guidelines for design and
safe handling of:
1.1.1
liquid hydrocarbons,
1.1.2
toxic liquids,
1.1.3
chemicals,
1.1.4
corrosive liquids,
1.1.5
aqueous materials, and
1.1.6
other liquid effluents
that are drained in Saudi Aramco’s onsite and offsite facilities, including but not
limited to transportation pipelines, tank farms and other types of hydrocarbons
processing or handling facilities.
1.2
This standard covers all types of industrial liquid drains including, but not
limited to, the following:
1.2.1
instrument bridles and sight glasses
1.2.2
thermal relief valves on liquid piping
1.2.3
pump and compressor casings
1.2.4
knockout drums
1.2.5
process vessels and separators
1.2.6
heat exchangers
1.2.7
filters
1.2.8
reactors
1.2.9
fractionation columns
1.2.10 scraper launchers / receivers
Page 3 of 16
Document Responsibility: Industrial Drainage Standards Committee
Issue Date: 26 October 2015
Next Planned Update: 26 October 2018
SAES-A-400
Industrial Drainage Systems
1.2.11 bulk plants loading, unloading and heel recovery
1.2.12 loading arms
1.2.13 low pressure and atmospheric product storage tanks
1.2.14 hydrocarbon storage tanks’ dewatering systems
1.2.15 sample points
1.2.16 low point drains from control valves and piping systems
1.3
2
This standard does not cover:
1.3.1
The environmental design aspects of treating collected liquids from
industrial drainage and oily water drainage systems (refer to SAES-A-103
and SAES-A-104).
1.3.2
The drain systems of laboratories or dedicated battery rooms
(SAES-P-103) governed by SAES-S-060.
1.3.3
The offshore platform drainage systems (SAES-A-403).
1.4
For retroactive applications of this standard to existing facilities, refer to
SAEP-125, Paragraph 3.1.
1.5
For conceptual understanding of relationships between oily water and closed
drain systems, refer to simplified schematics under Appendix I for Process
Areas. THE SCHEMATICS NEITHER SUPERSEDE THE REQUIREMENTS
OF THIS STANDARD NOR DO THEY DICTATE THE CONFIGURATION
OF A CLOSED DRAIN SYSTEM OR AN OILY WATER DRAINAGE
SYSTEM.
Conflicts and Deviations
2.1
Any conflicts between this Standard and other applicable Saudi Aramco
Engineering Standards (SAESs), Saudi Aramco Materials System Specifications
(SAMSSs), Saudi Aramco Standard Drawings (SASDs), or industry standards,
codes, and forms shall be resolved in writing by the Company or Buyer
Representative through the Manager, Process & Control Systems Department of
Saudi Aramco, Dhahran.
2.2
Direct all requests to deviate from the Standard in writing to the Company or
Buyer Representative, who shall follow internal company procedure SAEP-302
and forward such requests to the Manager, Process & Control Systems
Department of Saudi Aramco, Dhahran.
Page 4 of 16
Document Responsibility: Industrial Drainage Standards Committee
Issue Date: 26 October 2015
Next Planned Update: 26 October 2018
3
SAES-A-400
Industrial Drainage Systems
References
All referenced Specifications, Standards, Codes, Forms, Drawings, and similar material
shall be considered part of this Standard to the extent specified herein and shall be the
latest issue (including all revisions, addenda, and supplements) unless stated otherwise.
3.1
Saudi Aramco References
Saudi Aramco General Instructions
GI-0150.100
Hazardous Materials Communication (HAZCOM)
Program
GI-0430.001
Implementing the Saudi Aramco Hazardous Waste
Code
Saudi Aramco Engineering Procedure
SAEP-125
Preparation of Saudi Aramco Engineering
Standards
SAEP-302
Instruction for Obtaining a Waiver of a Mandatory
Saudi Aramco Engineering Requirement
SAEP-327
Disposal of Wastewater from Cleaning, Flushing
and Dewatering Pipelines and Vessels
Saudi Aramco Engineering Standards
SAES-A-007
Hydrostatic Testing Fluids and Lay-Up Procedures
SAES-A-103
Discharges to the Marine Environment
SAES-A-104
Wastewater Treatment, Reuse and Disposal
SAES-A-401
Closed Drain Systems
SAES-A-403
Offshore Platform Drainage Systems
SAES-B-005
Spacing and Diking for Atmospheric and LowPressure Tanks
SAES-B-054
Access, Egress, and Materials Handling for Plant
Facilities
SAES-B-055
Plant Layout
SAES-B-068
Electrical Area Classification
SAES-B-070
Fire and Safety Requirements for Bulk Plants, Air
Fueling and Sulfur Loading Facilities
SAES-F-007
System Design Criteria for Flares
Page 5 of 16
Document Responsibility: Industrial Drainage Standards Committee
Issue Date: 26 October 2015
Next Planned Update: 26 October 2018
SAES-A-400
Industrial Drainage Systems
SAES-G-005
Centrifugal Pumps
SAES-J-003
Instrumentation - Basic Design Criteria
SAES-P-103
UPS and DC Systems
SAES-S-010
Sanitary Sewers
SAES-S-020
Oily Water Drainage Systems
SAES-S-030
Storm Water Drainage Systems
SAES-S-060
Saudi Aramco Plumbing Code
Saudi Aramco Material Systems Specifications
16-SAMSS-503
Indoor Control Gear - Low Voltage
16-SAMSS-514
Control and Protective Relay Panel - Indoor
Saudi Aramco Engineering Reports
3.2
SAER-5437
Guidelines for Conducting HAZOP Studies
SAER-6168
Engineering Review Report for Oily Water Lift
Stations
Industry Codes and Standards
American Society for Testing and Materials
ASTM D97
Standard Test Method for Pour Point of Petroleum
Products
National Fire Protection Association
NFPA 704
3.3
Identification of the Hazards of Materials for
Emergency Response
Saudi Government Documents and Standards
The Saudi Government General Environmental Regulations, General
Environmental Regulations
3.4
Chemical Hazard Bulletins (CHB’S)
CHB# 14
Sodium Hydroxide (Caustic Soda)
CHB# 47
Benzene
CHB# 71
Phenol (Carbolic Acid)
CHB# 155
Hydrogen Sulfide (H2S)
CHB# 400
Sulfuric Acid
Page 6 of 16
Document Responsibility: Industrial Drainage Standards Committee
Issue Date: 26 October 2015
Next Planned Update: 26 October 2018
4
SAES-A-400
Industrial Drainage Systems
CHB# 518
STADIS 450 (Anti-Static Additive)
CHB# 666
Hot Pot – 922 (Corrosion Inhibitor)
Definitions
Chemical Hazard Bulletin (CHB): An internal company document (Available in both
English & Arabic) developed by Environmental Protection Department to provide
standardized one-page summary of a material’s hazard ratings that will specify health
hazard, fire & reactivity, handling, storage & disposal and first aid information for use
in the handling of hazardous materials. Use of CHBs shall be consistent with the
requirements contained within GI-0150.100, Hazardous Materials Communication
Program (HAZCOM) to ensure employees are knowledgeable of the hazards associated
with the specific chemicals.
Closed Drain System (CDS): A closed drain system is a piping collection system
connecting selected hydrocarbon drains and is provided with recovery or safe disposal of
collected liquids. A CDS is isolated from air or oxygen sources. (Refer to SAES-A-401).
Combustible Liquid: A liquid that has a flash point greater than 54°C (130°F).
Examples of such fluids are: diesel, transformer oils, C7+ feed stocks, bunker fuel, and
sulfur (refer to SAES-B-005).
Dewatering Effluent: Contaminated liquid water separated from a hydrocarbon
storage tank that requires further treatment to separate and recover contained
hydrocarbons away from water before water can be disposed off through a waste water
treatment system in accordance with SAES-A-104.
Flammable Liquid: A liquid that has a flash point equal to or less than 54°C (130°F).
Examples of such fluids are: stabilized crude, gasoline, Jet A-1, Jet JP-4, Jet JP-8, C6 and
lighter feed and blending stocks, and methanol. For purposes of this standard, a
combustible liquid stored or processed at a temperature equal to or higher than 8°C (15°F)
below its flashpoint shall be considered to be a flammable liquid (refer to SAES-B-005).
Flash Point: The flash point of a flammable liquid is the lowest temperature at which it
can form an ignitable mixture in air. At this temperature the vapor may cease to burn
when the source of ignition is removed (refer to SAES-B-005).
Flushing Oil: A lighter (greater API gravity) hydrocarbon liquid that is completely
miscible and can be used to improve the fluidity of a high pour point hydrocarbon liquid.
Health Hazard Materials: Any material or chemical for which there is statistically
significant evidence based on at least one study conducted in accordance with
established scientific principles that acute or chronic health effects may occur in
exposed employees (as defined in GI-0150.100).
Page 7 of 16
Document Responsibility: Industrial Drainage Standards Committee
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Next Planned Update: 26 October 2018
SAES-A-400
Industrial Drainage Systems
High Health Hazard Materials: High Health Hazard Materials, as defined herein,
include:
(a)
(b)
Materials with a Health Hazard rating of 3 or 4 per the Saudi Aramco Chemical
Hazards Bulletins (CHBs), or per NFPA 704. Examples of such materials include
but are not limited to:

sodium hydroxide (caustic soda) – CHB# 14

benzene – CHB# 47

phenol (carbolic acid) – CHB# 71

hydrogen sulfide (H2S) – CHB# 155

sulfuric acid – CHB# 400

STADIS 450 – (anti-static additive) – CHB# 518

hot pot -922 (corrosion inhibitor) – CHB# 666
Highly corrosive materials such as acid, caustic and other materials injurious to
personnel.
Highly Corrosive Materials: For purposes of applying this Standard, aqueous
materials with a pH level 1-3 (acid) or pH level 12-14 (base) which, on brief exposure,
could cause major injury or destructive damage.
High-Pour Point Materials: Materials that have a pour point within 10°C (18°F) of
the ambient temperature.
Influent Sump: A lift station installed at the inlet to an oily water separator.
Inventory: All liquid contained in the vessel including contents in the piping to the
nearest emergency shut down or block valve.
Lift Station: A facility to pump effluent from a sump to a point of higher elevation
(refer to SAES-S-020).
Neutralization: For pH control, the Government allowable discharge is between 6 and
9 standard pH units. Discharge liquids must meet Government and SAES-A-104
definition of pH quality.
Oily Water: Mixtures of hydrocarbon residues and water. Oily water is considered to
be contaminated water released during normal operation.
Note:
Due to unforeseen conditions and during uncontrollable accidental situations such as
during fire or spill-containment, the oily water drainage system may receive oilcontaminated wastewater with flammable hydrocarbons (refer to SAES-S-020).
Page 8 of 16
Document Responsibility: Industrial Drainage Standards Committee
Issue Date: 26 October 2015
Next Planned Update: 26 October 2018
SAES-A-400
Industrial Drainage Systems
Oily Water Drainage System (OWDS): A system that removes surface runoffs and
effluents from process areas within a plot limit to a treatment facility, or off-plot pond
area. It operates either by gravity or pumping force. The OWDS consists of catch
basins, manholes, and a network of drainage piping consisting of sub-laterals, laterals,
sub-mains and mains (refer to SAES-S-020 and SAER-6168).
Pour Point: Pour point of a liquid is the lowest temperature at which the liquid will
just flow under standards test conditions as defined by ASTM D97 [ASTM Standards
Test Method for Pour Point of Petroleum Oils (D97/IP 15)].
Pressurized Hydrocarbons: Pressurized hydrocarbons shall mean that the pressure in
the source equipment at the time of drainage is sufficient to overcome the hydraulic and
static system pressure drop to transfer liquid hydrocarbons to a CDS.
Process Areas: All physical areas of a facility that involve processing, handling and
treating of hydrocarbons including any sources of ignition. Typical outside process area
facilities include tank farms, pipelines, waste water ponds, etc.
Tank Dewatering System: A system to remove settled water from atmospheric
hydrocarbon storage tanks. (For flammable liquid tanks refer to SAES-A-401, and for
combustible liquid tanks refer to SAES-S-020.)
Toxic: Any material with health hazard 3 or 4 as defined by NFPA 704.
5
General Requirements
Selection of the type of drainage system shall be based on the following design and
operating philosophy:
5.1
Combustible, flammable, high health hazard, toxic, corrosive, or high-pour point
liquid materials shall not be drained into the oily water drainage system
(OWDS) (SAES-S-020), storm water drainage system (SAES-S-030), or
sanitary sewer system (SAES-S-010) except as provided for under Section 6 of
this standard.
5.2
Any facility handling flammable and combustible liquid hydrocarbons, toxic or
high health hazard materials shall have a closed drain system (CDS) designed in
accordance with SAES-A-401. This requirement is applicable to new or
existing facilities. Existing facilities may use available systems to meet the
intent of CDS definition under Section 4.
5.3
All flammable and combustible liquid hydrocarbons, toxic and high health
hazard materials shall be drained to CDS.
Page 9 of 16
Document Responsibility: Industrial Drainage Standards Committee
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Next Planned Update: 26 October 2018
5.4
SAES-A-400
Industrial Drainage Systems
No pressurized flammable and combustible liquid hydrocarbons and high health
hazard materials shall be drained to an OWDS.
In order to minimize drainage to CDS, product or intermediate process streams
shall be diverted to an off-specification system (e.g., during startup, emergency
or shutdown of downstream equipment).
After draining of equipment inventory into CDS, residual inventories of
flammable and combustible liquids and high health hazard materials shall be
flushed with water for a minimum of three volume flushes (water shall not react
with material). After the flush less than 0.1 m³
(26 US gallons) from equipment may be drained to the OWDS.
5.4.1
If draining to the OWDS, the sewer shall be flushed with water for
further dilution after draining such flammable and combustible liquids
and high health hazard materials. Water flushing in the equipment shall
continue until percent lower explosive limit (%LEL) determined by
manual test, by lowering the %LEL tester sample hose near the liquid
indicates <10% of the LEL tester indication and H2S content less than
10 ppm.
Operational Commentary:
Prior to flushing with water in the equipment, reduce inventory to
minimum, preferably <0.1 m³ (26 US gallons) to conserve water.
5.4.2
Draining flammable and combustible liquids and high health hazard
materials to OWDS under above guideline is subject to: (a) wind
direction, (b) positioning of any ignition source beyond 15 m, (c) H2S
content less 10 ppm, and (d) use of proper safety personal protective
equipment (PPE) including breathing apparatus.
Operational Commentaries:
5.5
(1)
Contact Environmental Compliance Division for recommendation of PPE,
which will include skin, eye, and respiratory protection for the relevant
chemical hazard.
(2)
Foreman and/or Shift Superintendent responsible for the operation of oily
wastewater treatment system shall be informed prior to the draining of
these hydrocarbon liquids. This is required in order to prevent failure of
the treatment system and the violation of environmental regulations.
For T&I or equipment maintenance, the system shall be designed to drain and
depressurize equipment to CDS. Provision for N2 or fuel gas to transfer any
residual, low pressure flammable and combustible liquids and high health
hazard materials to CDS shall be provided, except for existing equipment where
design pressures do not allow pressurization by N2 or fuel gas. Depressurized
Page 10 of 16
Document Responsibility: Industrial Drainage Standards Committee
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Next Planned Update: 26 October 2018
SAES-A-400
Industrial Drainage Systems
equipment drains (normally closed and blinded) may be opened to OWDS only
to confirm that all flammable and combustible liquids and high health hazard
materials have been completely drained.
Operational Commentary:
Since the CDS system is heavily utilized during plant/unit T&I, it is probably best to
schedule the T&I of the CDS while the operating unit is in service. The Operations &
Maintenance Manual shall provide for temporary arrangements and precautions for
any emergency drainage through the OWDS while the CDS in undergoing its T&I.
5.6
The design of OWDS shall be in accordance with SAES-S-020. The lift station
pump(s) requirements shall be in accordance with SAES-G-005 and designed to
safely operate under the requirements of SAES-B-068. In addition, a power
monitor shall be provided to trip lift station pumps on loss of flow. All motors on
lift station pumps shall include an under power trip function implemented in the
control gear protection relay, as per 16-SAMSS-503 and 16-SAMSS-514.
The under power feature shall be set and tested such that it will trip the pump only
on dry-run and no-flow conditions and shall not cause nuisance trips. The under
power trip is in “addition-to” other required low-flow trips on lift station pumps as
specified by SAES-S-020.
5.7
High pour point materials, like asphalt, demex pitch, etc., shall be drained to a
dedicated concrete pit that is designed for high temperature service and shall
maintain the temperature of the drained material at least 10°C (18°F) above the
pour point.
5.7.1
Draining high pour point liquids in OWDS is prohibited since this could
cause plugging.
5.7.2
High-pour point materials that can be safely mixed with flushing oils or
diesel to improve fluidity shall be drained to CDS.
5.7.3
Accumulated liquids may be disposed by a vacuum truck.
5.8
No liquids drainage piping of any kind shall be directly connected into the gas
flare system.
5.9
All sour water separated from hydrocarbon processing equipment shall be
directed to sour water treatment facilities. Hydrocarbon contaminated water
shall be handled in accordance with SAES-A-401.
5.10
All equipment drain piping to an OWDS shall be isolated by double isolation
(e.g., one block and bleed valves with plug or blind flange).
Page 11 of 16
Document Responsibility: Industrial Drainage Standards Committee
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SAES-A-400
Industrial Drainage Systems
Commentary:
To assure drain piping tightness and avoid potential piping dead leg, one block
valve shall be installed at or close to equipment outlet nozzle or at drain piping
take off and the second isolation shall be located near OWDS funnel. Blind or
plug shall be installed downstream the second block valve.
5.11
All liquid drain systems shall be designed and conformed to the formal Hazard
and Operability (HAZOP) methodology following the guidelines in HAZOP
Engineering Report SAER-5437.
5.12
Hot steam condensate shall be directed to the condensate recovery system.
Operational Commentaries:
1.
In the event of any contamination of steam condensate with hydrocarbons, identify
the source of contamination and isolate for correction.
2.
If for any reason, hydrocarbon-contaminated hot steam condensate is directed to
OWDS, then it must be cooled by dilution with utility or fire water before entering
OWDS.
5.13
For the design of OWDS and CDS for an offshore facility refer to SAES-A-403.
5.14
The disposal of wastewater from cleaning, flushing and dewatering pipelines,
tanks, and vessels at onshore facilities shall be in accordance with SAEP-327.
Hydrostatic test waters shall be disposed off in accordance with the
requirements of SAEP-327 and SAES-A-103; and disposal plans must be
approved prior to the start of any hydrotest in accordance with SAES-A-007.
5.15
For continuous liquid drainage flow, the size of the drainage pipe shall not be
reduced in size in the direction of the flow.
5.16
Plants for loading/unloading of products from trucks shall be provided with heel
recovery to empty such products from the trucks when necessary into collection
facilities. Operations will also ensure heels recovered or transferred from such
truck tanks are properly analyzed to ensure compatibility of contents to avoid
inadvertent chemical or exothermic/endothermic reactions.
Commentary:
Heel recovery facilities are intended to end practices that discharge truck contents
to the environment prior to loading products. Such practices have the potential of
soil/ground water contamination, toxic/flammable vapors and in general impact on
health, safety and environment. Provision of heel recovery facility will prevent such
practices and ensure alignment with the national directive.
Page 12 of 16
Document Responsibility: Industrial Drainage Standards Committee
Issue Date: 26 October 2015
Next Planned Update: 26 October 2018
6
SAES-A-400
Industrial Drainage Systems
Drain Requirements for Specific Applications
Drain system design for specific flammable and combustible liquids drain applications
shall be as follows:
Flammable/Toxic
Liquids
Combustible Liquids
CDS1
CDS1 (except as
provided under 5.4)
CDS or route to storage
or holding vessel
OWDS or route to
storage or holding vessel
Drain Points3
6.1
Instrument Bridles and Sight
Glasses
6.2
Thermal Relief Valves on
Liquid Piping
6.3
Pump and Compressor Casings
CDS
CDS (except as
provided under 5.4)
6.4
Knockout Drums
CDS
CDS (except as
provided under 5.4)
6.5
Process Vessels and Separators
CDS
CDS (except as
provided under 5.4)
6.6
Heat Exchangers
CDS
CDS (except as
provided under 5.4)
6.7
Filters
CDS
CDS (except as
provided under 5.4)
6.8
Reactors
CDS
CDS (except as
provided under 5.4)
6.9
Scraper Launchers/Receivers
CDS2
CDS2 (except as
provided under 5.4)
CDS
CDS (except as
provided under 5.4)
Refer to Section 7.1
of this standard
Refer to Section 7.2 of
this standard
6.12 Sample Points Flush
CDS
CDS (except as
provided under 5.4)
Low Point Drains from Control
6.13 Valves, Custody Metering
Stations and Piping Systems
CDS1
CDS1 (except as
provided under 5.4)
6.10 Ship Loading Arms
6.11
Hydrocarbon Storage Tanks’
Dewatering Systems
Notes:
1. Temporary drain connections as allowed by Section 6.5.5.6 of SAES-A-401 may be used.
2. Exception for Scraper Launchers/Receivers:
Page 13 of 16
Document Responsibility: Industrial Drainage Standards Committee
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SAES-A-400
Industrial Drainage Systems
In remote locations, where a CDS is neither justified nor practicable, a collection vessel without a
pump shall be provided. The design shall include but not limited to the following:
a)
A detailed drawing showing the arrangement for the Scraper Launchers/Receivers drainage
system and the collection vessel construction. The collection vessel volume shall be properly
sized to handle the maximum flow rate to meet the design drain basis of the scraper
launchers/receiver.
b)
Drain shall be hard piped to the collection vessel and the hard-pipe drain network shall be
sized for closed drainage system utilizing gravity drainage.
c)
The collection vessel shall be fitted with a pump out pipe with quick connector, dust cap and
chain design to allow tankers to vacuum out the content of the collection vessel for disposal in
accordance with GI-0430.001.
d)
The collection vessel shall be fitted with a 4-inch vent extending 3 meters above ground and at
a location 15 meters minimum downwind from any ignition source as per SAES-S-020.
For collection vessels receiving sour hydrocarbons, the vent height and minimum location
downwind from personnel or any ignition source shall not be less than the requirements of
SAES-S-020 and shall be concurred in writing with the Loss Prevention Department and the
Chairman, Industrial Drainage Standards Committee.
e)
The collection vessel shall have a level instrument with local siren alarm in accordance with
SAES-J-003.
f)
For collection of scraper/receiver drains, collection vessel shall be installed below grade in
accordance with requirements of SAES-D-116.
g)
Hydrocarbons from scraper launcher and receivers shall not be drained to an OWDS or grade.
3. For Bulk Plants, Flammable Hydrocarbon may drain into the same sump that receive oily water
drains from the plant. However, a dedicate hydrocarbon drain network shall be used to avoid
mixing hydrocarbon with Oily Water Drain piping network.
7
Tank Dewatering
All hydrocarbon tanks that require dewatering shall be equipped for water drainage.
7.1
Dewatering effluent from flammable hydrocarbon storage tanks shall be in
accordance with SAES-A-401.
7.2
Dewatering effluent from combustible hydrocarbon storage tanks may be
drained to OWDS in accordance with SAES-S-020.
Commentary:
High pour point materials from storage tanks shall not be drained to OWDS.
These streams shall be drained in accordance with paragraph 5.8.
Page 14 of 16
Document Responsibility: Industrial Drainage Standards Committee
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8
SAES-A-400
Industrial Drainage Systems
Appendices
For conceptual understanding of relationships between OWDS and CDS, refer to
simplified schematics as follows:
Appendix I - Process Areas
The schematic DO NOT SUPERSEDE requirements of this standard.
26 October 2015
Revision Summary
Major revision to align the document with industry standards, guidelines and best practices.
Page 15 of 16
Document Responsibility: Industrial Drainage Standards Committee
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SAES-A-400
Industrial Drainage Systems
Appendix I - Simplified Schematic of Industrial Drainage Systems
(This schematic DOES NOT SUPERSEDE requirements of this standard.)
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