Petroleum, petrochemical and natural gas industries - Lubrication, shaft-sealing and control-oil systems and auxiliaries - Part 3: General-purpose oil systems (ISO 10438-3:2007)

ISO 10438-3:2007, in conjunction with ISO 10438-1, specifies requirements for oil systems for general-purpose applications. These oil systems can provide lubrication oil, but not seal oil and can serve equipment such as compressors, gears, pumps and drivers.

Erdöl-, petrochemische und Erdgasindustrie - Schmieröl-, Sperröl- und Regelölversorgungsanlagen und Hilfsanlagen - Teil 3: Ölversorgungsanlagen für allgemeine Anwendungsfälle (ISO 10438-3:2007)

Industries du pétrole, de la pétrochimie et du gaz naturel - Systèmes de lubrification, systèmes d'étanchéité, systèmes d'huile de régulation et leurs auxiliaires - Partie 3: Systèmes d'huile pour applications générales (ISO 10438-3:2007)

L'ISO 10438-3:2007, conjointement à l'ISO 10438-1, spécifie les exigences concernant les systèmes d'huile pour des applications générales. Ces systèmes d'huile peuvent fournir l'huile de lubrification, mais non pas l'huile d'étanchéité, et peuvent desservir des équipements comme les compresseurs, les mécanismes d'engrenage, les pompes et les dispositifs d'entraînement.

Petrokemična industrija ter industrija za predelavo nafte in zemeljskega plina - Sistemi za mazanje, zapiranje jaškov in oskrbo ter pomožna oprema - 3. del: Sistemi za splošno uporabo (ISO 10438-3:2007)

General Information

Status
Published
Publication Date
14-Dec-2007
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
15-Dec-2007
Completion Date
15-Dec-2007

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SLOVENSKI STANDARD
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6LVWHPL]DPD]DQMH]DSLUDQMHMDãNRYLQRVNUERWHUSRPRåQDRSUHPDGHO
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Petroleum, petrochemical and natural gas industries - Lubrication, shaft-sealing and

control-oil systems and auxiliaries - Part 3: General-purpose oil systems (ISO 10438-

3:2007)
Erdöl-, petrochemische und Erdgasindustrie - Schmieröl-, Sperröl- und
Regelölversorgungsanlagen und Hilfsanlagen - Teil 3: Ölversorgungsanlagen für
allgemeine Anwendungsfälle (ISO 10438-3:2007)

Industries du pétrole, de la pétrochimie et du gaz naturel - Systèmes de lubrification,

systèmes d'étanchéité, systèmes d'huile de régulation et leurs auxiliaires - Partie 3:

Systèmes d'huile pour applications générales (ISO 10438-3:2007)
Ta slovenski standard je istoveten z: EN ISO 10438-3:2007
ICS:
75.180.20
SIST EN ISO 10438-3:2008 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN ISO 10438-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2007
ICS 75.180.20 Supersedes EN ISO 10438-3:2003
English Version
Petroleum, petrochemical and natural gas industries -
Lubrication, shaft-sealing and control-oil systems and auxiliaries
- Part 3: General-purpose oil systems (ISO 10438-3:2007)

Industries du pétrole, de la pétrochimie et du gaz naturel - Erdöl-, petrochemische und Erdgasindustrie - Schmieröl-,

Systèmes de lubrification, systèmes d'étanchéité, systèmes Sperröl- und Regelölversorgungsanlagen und Hilfsanlagen

d'huile de régulation et leurs auxiliaires - Partie 3: - Teil 3: Ölversorgungsanlagen für allgemeine

Systèmes d'huile pour applications générales (ISO 10438- Anwendungsfälle (ISO 10438-3:2007)

3:2007)
This European Standard was approved by CEN on 14 December 2007.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the CEN Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the

official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10438-3:2007: E

worldwide for CEN national Members.
---------------------- Page: 2 ----------------------
EN ISO 10438-3:2007 (E)
Contents Page

Foreword..............................................................................................................................................................3

---------------------- Page: 3 ----------------------
EN ISO 10438-3:2007 (E)
Foreword

This document (EN ISO 10438-3:2007) has been prepared by Technical Committee ISO/TC 67 "Materials,

equipment and offshore structures for petroleum and natural gas industries" in collaboration with Technical

Committee CEN/TC 12 "Materials, equipment and offshore structures for petroleum, petrochemical and

natural gas industries", the secretariat of which is held by AFNOR.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by June 2008, and conflicting national standards shall be withdrawn at

the latest by June 2008.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 10438-3:2003.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech

Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,

Sweden, Switzerland and the United Kingdom.
Endorsement notice

The text of ISO 10438-3:2007 has been approved by CEN as a EN ISO 10438-3:2007 without any

modification.
---------------------- Page: 4 ----------------------
INTERNATIONAL ISO
STANDARD 10438-3
Second edition
2007-12-15
Petroleum, petrochemical and natural gas
industries — Lubrication, shaft-sealing
and control-oil systems and auxiliaries —
Part 3:
General-purpose oil systems
Industries du pétrole, de la pétrochimie et du gaz naturel — Systèmes
de lubrification, systèmes d'étanchéité, systèmes d'huile de régulation
et leurs auxiliaires —
Partie 3: Systèmes d'huile pour applications générales
Reference number
ISO 10438-3:2007(E)
ISO 2007
---------------------- Page: 5 ----------------------
ISO 10438-3:2007(E)
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© ISO 2007

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,

electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or

ISO's member body in the country of the requester.
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Published in Switzerland
ii © ISO 2007 – All rights reserved
---------------------- Page: 6 ----------------------
ISO 10438-3:2007(E)
Contents Page

Foreword............................................................................................................................................................ iv

Introduction ........................................................................................................................................................ v

1 Scope ..................................................................................................................................................... 1

2 Normative references ........................................................................................................................... 1

3 Terms, abbreviated terms and definitions ......................................................................................... 2

4 General................................................................................................................................................... 2

4.1 Basic design.......................................................................................................................................... 2

4.2 General................................................................................................................................................... 4

4.3 Baseplates ............................................................................................................................................. 5

4.4 Oil reservoirs......................................................................................................................................... 6

4.5 Pumps and pump drivers..................................................................................................................... 9

4.6 Coolers................................................................................................................................................. 13

4.7 Filters ................................................................................................................................................... 16

4.8 Transfer valves.................................................................................................................................... 18

4.9 Lube-oil rundown tanks ..................................................................................................................... 18

5 Piping ................................................................................................................................................... 19

5.1 General................................................................................................................................................. 19

5.2 Oil piping ............................................................................................................................................. 19

5.3 Instrument piping................................................................................................................................ 19

5.4 Water piping ........................................................................................................................................ 19

6 Instrumentation and electrical systems ........................................................................................... 19

7 Inspection, testing and preparation for shipment........................................................................... 20

7.1 General................................................................................................................................................. 20

7.2 Inspection ............................................................................................................................................ 20

7.3 Testing ................................................................................................................................................. 20

7.4 Preparation for shipment ................................................................................................................... 22

8 Vendor's data ...................................................................................................................................... 22

8.1 General................................................................................................................................................. 22

8.2 Proposals............................................................................................................................................. 22

Annex A (informative) Datasheets .................................................................................................................. 23

Annex B (informative) Piping and instrument diagrams .............................................................................. 24

Annex C (informative) Inspector's checklist.................................................................................................. 29

Annex D (informative) Guidance to system reliability.................................................................................. 32

Bibliography ..................................................................................................................................................... 37

© ISO 2007 – All rights reserved iii
---------------------- Page: 7 ----------------------
ISO 10438-3:2007(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

(ISO member bodies). The work of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the

International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 10438-3 was prepared by Technical Committee ISO/TC 67, Materials, equipment and offshore structures

for petroleum, petrochemical and natural gas industries, Subcommittee SC 6, Processing equipment and

systems.

This second edition cancels and replaces the first edition (ISO 10438-3:2003), which has been technically

revised.

ISO 10438 consists of the following parts, under the general title Petroleum, petrochemical and natural gas

industries — Lubrication, shaft-sealing and control-oil systems and auxiliaries:
⎯ Part 1: General requirements
⎯ Part 2: Special-purpose oil systems
⎯ Part 3: General-purpose oil systems
⎯ Part 4: Self-acting gas seal support systems
iv © ISO 2007 – All rights reserved
---------------------- Page: 8 ----------------------
ISO 10438-3:2007(E)
Introduction

This International Standard was developed jointly with API 614, 5th edition. ISO 10438 is divided into four

parts corresponding to the four chapters of API 614.

Users of this part of ISO 10438 should be aware that further or differing requirements might be needed for

individual applications. This part of ISO 10438 is not intended to inhibit a vendor from offering, or the

purchaser from accepting, alternative equipment or engineering solutions for the individual application. This

may be particularly appropriate where there is innovative or developing technology. Where an alternative is

offered, the vendor should identify any variations from this part of ISO 10438 and provide details. This part of

ISO 10438 is to be used in conjunction with 10438-1.

This part of ISO 10438 requires the purchaser to specify certain details and features.

A bullet (•) at the beginning of a clause or subclause indicates that either a decision is required or further

information is to be provided by the purchaser. This information should be indicated on the datasheet(s);

otherwise it should be stated in the quotation request or in the order.

In this International Standard, US Customary (USC) units are included in brackets for information.

© ISO 2007 – All rights reserved v
---------------------- Page: 9 ----------------------
INTERNATIONAL STANDARD ISO 10438-3:2007(E)
Petroleum, petrochemical and natural gas industries —
Lubrication, shaft-sealing and control-oil systems and
auxiliaries —
Part 3:
General-purpose oil systems
1 Scope

This part of ISO 10438, in conjunction with ISO 10438-1, specifies requirements for oil systems for general-

purpose applications. These oil systems can provide lubrication oil, but not seal oil and can serve equipment

such as compressors, gears, pumps and drivers.
NOTE The term “general-purpose” is defined in ISO 10438-1.
2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

ISO 10438-1:2007, Petroleum, petrochemical and natural gas industries — Lubrication, shaft-sealing and

control-oil systems and auxiliaries — Part 1: General requirements

ISO 10438-2:2007, Petroleum, petrochemical and natural gas industries — Lubrication, shaft-sealing and

control-oil systems and auxiliaries — Part 2: Special-purpose oil systems

ISO 13706:2005, Petroleum, petrochemical and natural gas industries — Air-cooled heat exchangers

ISO 13709, Centrifugal pumps for petroleum, petrochemical and natural gas industries

ISO 15649:2001, Petroleum and natural gas industries — Piping

ISO 16889, Hydraulic fluid power — Filters — Multi-pass method for evaluating filtration performance of a filter

element
API RP 686, Machinery Installation and Installation Design
IEC 60034 (all parts), Rotating electrical machines
TEMA, Standards of the Tubular Exchanger Manufacturers Association
NEMA MG1, Motors and Generators
1) To be published. (Revision of ISO 16889:1999)
© ISO 2007 – All rights reserved 1
---------------------- Page: 10 ----------------------
ISO 10438-3:2007(E)
3 Terms, abbreviated terms and definitions

For the purposes of this document, the terms, definitions and abbreviated terms given in ISO 10438-1 apply.

4 General
4.1 Basic design

z 4.1.1 This part of ISO 10438 covers general-purpose oil systems. Typical datasheets for general-purpose

oil systems are in Annex A. Typical piping and instrument diagrams for general-purpose oil systems are in

Annex B. Typical inspector checklists for general-purpose oil systems are in Annex C. General-purpose (GP)

oil systems are divided into classes and are defined by a coding system that defines the major components

supplied (see Table 1). The user shall choose the applicable class and code based upon the required

minimum reliability targets for the equipment train. Various API standards have supplied minimum

recommended systems as indicated in Table 2 for their equipment. Annex D is supplied as a reference to

provide guidance on the selection of a system.

Table 1 — General-purpose oil system class types with standard configuration options

Equipment Class I Class II Class III
Shaft-driven main pump and Motor main and motor
Pump configuration Shaft-driven main pump only
motor auxiliary pump auxiliary pump
Positive displacement P0 P0 P0
Centrifugal N/A N/A P1
Reservoir part of equipment
R0 R0 R0
(i.e. gear case)
External stainless reservoir R1 R1 R1
Stainless pipe Default Default Default
No reservoir heater included H0 H0 H0
Reservoir heater H1 H1 H1
Baseplate part of equipment BP0 BP0 BP0
Stand-alone console,
reservoir mounted
BP1 BP1 BP1
(No baseplate)
Stand-alone console with full
BP2 BP2 BP2
baseplate
Single cooler and single filter C1F1 C1F1 C1F1
Single cooler and dual filter C1F2 C1F2 C1F2
Dual cooler and single filter C2F1 C2F1 C2F1
Dual cooler and dual filter C2F2 C2F2 C2F2
Shell-and-tube cooler(s) C0 C0 C0
Plate-and-frame cooler(s) C1 C1 C1
Fin/Fan cooler C2 C2 C2
Combined plv/pcv
PV0 PV0 PV0
(not applicable to centrifugal
pumps)
2 © ISO 2007 – All rights reserved
---------------------- Page: 11 ----------------------
ISO 10438-3:2007(E)
Table 1 (continued)
Equipment Class I Class II Class III
Separate PCV PV1 PV1 PV1
No thermostatic valve
TV0 TV0 TV0
included
Thermostatic valve TV1 TV1 TV1
No block-and-bypass valves
BB0 BB0 BB0
included
Block-and-bypass valves
BB1 BB1 BB1
around PCV

EXAMPLE 1 General-purpose system designations: Class I-P0-R1-H1-BP1-C1F2-C0-PV0-TV0-BB0

Shaft-driven main pump
Positive-displacement pump
External stainless steel reservoir
Reservoir heater included
Stand-alone console reservoir mounted equipment (no baseplate)
Single cooler and dual filters
Shell and tube cooler type
Combined PLV and PCV
No thermostatic valve
No block and bypass valves

EXAMPLE 2 General-purpose system designations: Class III-P0-R1-H1-BP2-C2F2-C0-PV1-TV1-BB1

Motor-driven main and motor-driven auxiliary pump
Positive-displacement pumps
External stainless steel reservoir
Reservoir heater included
Stand-alone console with full baseplate
Dual coolers and dual filters
Shell and tube cooler type
Separate PLV and PCV
Thermostatic valve
Block and bypass valves
© ISO 2007 – All rights reserved 3
---------------------- Page: 12 ----------------------
ISO 10438-3:2007(E)
Table 2 — Recommendations of minimum GP system class by equipment
P&ID figure Console class and code
Equipment type
ISO 13709 or API 610 B.1 Class II – P0-R1-H0-BP0-C1F1-C0-PV0-TV0-BB0
API 611 B.1 Class II – P0-R1-H0-BP1-C1F1-C0-PV0-TV0-BB0
ISO 13707 or API 618 B.2 Class II – P0-R0-H1-BP2-C1F2-C0-PV0-TV1-BB0
API 672 B.3 Class II – P0-R0-H1-BP0-C1F2-C0-PV1-TV1-BB0
API 673 B.4 Class III – P0-R1-H1-BP1-C1F1-C0-PV0-TV1-BB0
API 674 B.5 Class I – P0-R0-H0-BP0-C1F1-C0-PV0-TV0-BB0
API 677 B.5 Class I – P0-R0-H0-BP0-C1F1-C0-PV0-TV0-BB0

NOTE 1 This table is presented for guidance in the selection of a lubrication system for the above referenced

equipment.

NOTE 2 The recommended base systems are based on the individual referenced equipment standard

recommendations at the time of publication of this part of ISO 10438.

The referenced equipment standards may suggest alternative base systems in editions published subsequent to

this part of ISO 10438, or the user may select alternative systems based on his experience or a Failure modes and

effects analysis (FMEA) as described in Annex D.

4.1.2 The oil system supplied shall be capable of supplying sufficient quantities of clean, filtered oil at

proper temperature and pressure for start-up and all operating conditions of the serviced rotating equipment.

4.2 General

4.2.1 The equipment (including auxiliaries) covered by this part of ISO 10438 shall be designed and

constructed for a minimum service life of 20 years.
NOTE It is recognized that this is a design criterion.

z 4.2.2 The purchaser shall specify the design goal for uninterrupted operation (mission time) of the

equipment.
NOTE Annex D is available as a guide for system reliability goals.

4.2.3 The oil system shall be suitable for general purpose applications as defined in ISO 10438-1:2007,

3.1.17. The system shall be designed as a separate console or may be designed to be integral with the

baseplate of the equipment it serves. If components are spared, the design shall allow for transfer between

and shutdown of the main and spared components of the system for maintenance without interrupting the

operation of the system or the equipment the system serves. General-purpose systems supply lubricating oil

only (i.e. no seal oil) and do not require an accumulator to cover transient conditions.

An accumulator may be specified in accordance with ISO 10438-2, however, it is normally not required on this

class of equipment.

z 4.2.4 The purchaser shall specify the equipment's normal operating point and alternate operating points,

including transients.

z 4.2.5 Control of the sound pressure level (SPL) of all equipment furnished shall be a joint effort of the

purchaser and the vendor having unit responsibility. The equipment furnished by the vendor shall conform to

the maximum allowable sound pressure level specified. In order to determine compliance, the vendor shall

provide both maximum sound pressure and sound power level data per octave band for the equipment.

z 4.2.6 Where oil is supplied from a common system to two or more machines (such as a compressor, a gear

and a motor), the oil's characteristics shall be specified by the purchaser on the basis of mutual agreement

with all vendors supplying equipment served by the common oil system.
4 © ISO 2007 – All rights reserved
---------------------- Page: 13 ----------------------
ISO 10438-3:2007(E)
z 4.2.7 The system shall be designed to supply oil to all equipment specified.

4.2.8 Recycled oil originating upstream of the filters is preferred and is required when there is a possibility

of an explosive mixture in the reservoir.

NOTE This is to minimize the potential for generation of static electricity (or a static charge) that can result when

filtered oil bypasses the equipment and is recycled directly to the reservoir.

z 4.2.9 If specified, the arrangement of the equipment, including piping and auxiliaries, shall be developed

jointly by the purchaser and the vendor. The arrangement shall provide adequate clearance areas and safe

access for operation and maintenance.

NOTE For some pre-engineered general purpose oil systems, purchaser input might be impractical.

z 4.2.10 If specified, minimum defined requirements for clearance around and access to components

(especially clearance around and access to coolers, filters and hand valves) shall be incorporated as design

requirements.

z 4.2.11 If specified, pumps, filters, strainers, coolers, traps, valves and all other components that retain oil

under pressure and are external to the reservoir shall be made of steel.

4.2.12 Unless otherwise specified, pumps may be submerged in the reservoir and these may be made of

cast iron.

z 4.2.13 If specified, valved vents, drains and piping shall be furnished to permit draining, cleaning and refilling

of idle components while the equipment is in operation.

z 4.2.14 Unless otherwise specified, coolers, filters, overhead oil tanks, drain traps, accumulators and other

pressure vessels shall be in accordance with the specified pressure design code. If specified by the

purchaser, vessels shall be code stamped.

NOTE 1 Code stamping might not be applicable for pressure design codes other than ASME.

NOTE 2 Local jurisdictions can require a code stamp.

NOTE 3 Code stamping can require additional inspection over the life of the equipment.

z 4.2.15 The vendor shall advise the purchaser of, and both parties shall mutually agree upon, any special

provisions that are necessary to ensure that an adequate back-up supply of lube oil is maintained in the event

of complete failure of the primary lube-oil supply system. These provisions may include standby pumps,

rundown tanks and special arrangements for equipment safety and protection when the equipment

decelerates. Provisions shall be adequate for coast-down time and cool-off time, as applicable. The purchaser

and the vendor shall mutually agree on the system and its components.

4.2.16 Block valves that interrupt the oil flow to the equipment shall not be installed in oil supply lines

downstream of the filters unless the block valves are part of a component block and bypass arrangement.

4.2.17 When components that can require later removal for maintenance are installed using screwed

connections, the connecting piping shall be provided with flanges such that the component can be removed

without requiring cutting pipe or major disassembly of the unit.
4.3 Baseplates

4.3.1 The major components (pumps, filters, coolers and reservoir) shall be mounted directly on structural

steel as a separate console or integrated with the equipment base.

NOTE Reference can be made to the baseplate section of the lubricated equipment specification for baseplate

requirements when the console is integrated into the equipment base.
© ISO 2007 – All rights reserved 5
---------------------- Page: 14 ----------------------
ISO 10438-3:2007(E)

4.3.2 Unless otherwise specified, package baseplates shall be of the drain-gutter type with one or more

drain connections at least DN 40 (NPS 1 1/2). Baseplates, mounted components and decking shall be

arranged and installed to ensure drainage and avoid the retention of liquid. Sloping of the decking is not

required.
z 4.3.3 If specified, sloped decking shall be furnished.

4.3.4 The baseplate shall be provided with lifting lugs for at least a four-point lift or other suitable means.

The baseplate shall be designed so that after the components and all piping mounted on it are drained of oil,

the package can be lifted without permanently distorting or otherwise damaging either the baseplate or any

component mounted on it.

z 4.3.5 If specified, metal decking covering all walk and work areas shall be provided on the top of the

baseplate. If furnished, metal decking shall be non-skid.

NOTE Decking might not be required when the grout pour is used to create a walking surface.

z 4.3.6 If specified, baseplates shall be suitable for installation in accordance with API RP 686. Unless

otherwise specified, all baseplates shall be provided with at least one opening or hole in each bulkhead

section through which grout can be poured and vented. Each opening shall have a clear area of no less than

2 2

125 cm (20 in ) and no dimension less than 100 mm (4 in), and each shall permit filling and venting of the

entire cavity with grout under the baseplate without creating air pockets. Each hol

...

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