SIST EN 10374:2021

SLOVENSKI STANDARD
SIST EN 10374:2021
01-november-2021
Varjeni spojni elementi za živilsko in kemično industrijo - Odcepi, kolena in
reducirni elementi za varjenje
Welded fittings for the food and chemical industries - Tees, bends and reducers for
welding
Anschweißarmaturen in der Lebensmittel- und chemischen Industrie - T-Stücke, Bogen
und Reduzierstücke zum Anschweißen
Raccords soudés pour l'industrie alimentaire et chimique - Tés, coudes et réducteurs à
souder
Ta slovenski standard je istoveten z: EN 10374:2021
ICS:
23.040.40 Kovinski fitingi Metal fittings
SIST EN 10374:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 10374:2021

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SIST EN 10374:2021


EN 10374
EUROPEAN STANDARD

NORME EUROPÉENNE

August 2021
EUROPÄISCHE NORM
ICS 23.040.40
English Version

Welded fittings for the food and chemical industries - Tees,
bends and reducers for welding
Raccords soudés pour l'industrie alimentaire et Formstücke zum Anschweißen in der Lebensmittel-
chimique - Tés, coudes et réductions à souder und chemischen Industrie - T-Stücke, Bogen und
Reduzierstücke zum Anschweißen
This European Standard was approved by CEN on 11 July 2021.

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-CENELEC 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-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10374:2021 E
worldwide for CEN national Members.

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SIST EN 10374:2021
EN 10374:2021 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Symbols and abbreviated terms . 6
5 Designation of fittings and steel grades . 7
5.1 Designation of fittings . 7
5.2 Elbow . 7
5.3 Reducer . 7
5.4 T-piece . 7
5.4.1 T-piece form TL and form TS . 7
5.4.2 T-piece form TRL and form TRS . 7
5.5 Designation of steel grades . 7
6 Information to be supplied by the purchaser . 8
6.1 Mandatory information . 8
6.2 Options . 8
6.3 Examples of an order . 8
7 Requirements . 9
7.1 Material . 9
7.2 Manufacturing Process. 9
7.2.1 General . 9
7.2.2 Welding . 9
7.2.3 Heat treatment . 11
7.2.4 Surface finish and cleanliness . 11
8 Dimensions and tolerances . 11
8.1 Dimensions . 11
8.1.1 General . 11
8.1.2 Elbow . 11
8.1.3 Reducer . 18
8.1.4 T-piece . 22
8.2 Tolerances . 26
8.2.1 Dimensional tolerances . 26
8.2.2 Form tolerances . 28
9 Inspection . 32
9.1 Inspection criteria . 32
9.2 Inspection documents . 32
10 Marking . 33
11 Packaging and transport . 33
Annex A (informative) Supplementary information related to additional ordering
information on fabrication options . 34
Annex B (informative) List of stainless steel grades for fittings . 35
Bibliography . 36
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SIST EN 10374:2021
EN 10374:2021 (E)
European foreword
This document (EN 10374:2021) has been prepared by Technical Committee CEN/TC 459/SC 10 “Steel
tubes and fittings for steel tubes”, the secretariat of which is held by UNI.
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 February 2022, and conflicting national standards
shall be withdrawn at the latest by February 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
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SIST EN 10374:2021
EN 10374:2021 (E)
1 Scope
This document specifies dimensions, tolerances, internal and external surface characteristics and
marking of welded fittings for the food and chemical industry.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
EN 10028-7, Flat products made of steels for pressure purposes - Part 7: Stainless steels
EN 10088-1, Stainless steels - Part 1: List of stainless steels
EN 10088-2, Stainless steels - Part 2: Technical delivery conditions for sheet/plate and strip of corrosion
resisting steels for general purposes
EN 10204, Metallic products - Types of inspection documents
EN 10216-5, Seamless steel tubes for pressure purposes - Technical delivery conditions - Part 5: Stainless
steel tubes
EN 10217-7, Welded steel tubes for pressure purposes - Technical delivery conditions - Part 7: Stainless
steel tubes
EN 10253-4, Butt-welding pipe fittings - Part 4: Wrought austenitic and austenitic-ferritic (duplex)
stainless steels with specific inspection requirements
EN 10357, Austenitic, austenitic-ferritic and ferritic longitudinally welded stainless steel tubes for the food
and chemical industry
EN 13018, Non-destructive testing - Visual testing - General principles
EN 13480 (series), Metallic industrial piping
EN ISO 1127, Stainless steel tubes - Dimensions, tolerances and conventional masses per unit length (ISO
1127)
EN ISO 4288, Geometrical product specifications (GPS) - Surface texture: Profile method - Rules and
procedures for the assessment of surface texture (ISO 4288)
EN ISO 6520-1, Welding and allied processes - Classification of geometric imperfections in metallic
materials - Part 1: Fusion welding (ISO 6520-1)
ISO 13715, Technical product documentation - Edges of undefined shape - Indication and dimensioning
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN ISO 6520-1 and the following
apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
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SIST EN 10374:2021
EN 10374:2021 (E)
3.1
elbow
elbow fitting to allow a change direction of the pipeline with an angle of 45 °, 90 ° or 180 °
3.1.1
elbow form BS
elbow with standard weld ends
Note 1 to entry: Short execution.
3.1.2
elbow form BL
elbow with prolonged welding ends
Note 1 to entry: Long execution.
3.2
reducer
fitting that reduces the pipeline size from larger to a smaller diameter
3.2.1
reducer form RCS
concentric reducer with short length
Note 1 to entry: Short type.
3.2.2
reducer form RCL
concentric reducer with long length
Note 1 to entry: Long type.
3.2.3
reducer form RES
eccentric reducer with short length
Note 1 to entry: Short type.
3.2.4
reducer form REL
eccentric reducer with long length
Note 1 to entry: Long type.
3.3
T-piece
T-shaped fitting with a straight run and a branch perpendicular to the run
3.3.1
T-piece form TL
T-piece with equal tube diameters
3.3.2
T-piece form TS
T-piece with a short branch and equal tube diameters
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SIST EN 10374:2021
EN 10374:2021 (E)
3.3.3
T-piece form TRL
T-piece with a branch tube diameter smaller than the run tube diameter
3.3.4
T-piece form TRS
T-piece with a short branch and a branch tube diameter smaller than the run tube diameter
4 Symbols and abbreviated terms
For the purposes of this document, the symbols and abbreviated terms in Table 1 shall be applied.
Table 1 — Symbols and abbreviated terms
Symbol Unit Description
d d
mm specified inside diameter for reducers
1, 2
D, D , D mm specified outside diameter for T-pieces and elbows
1 2
— distance from the axis of the branch outlet to the face of the
centre body of the T-pieces
— distance from the centre of one welding end to the centre of a
l
mm
0
90 ° elbow form BS at the welding ends
— distance from one welding end to the axis of the centre line for
elbow form BS-180
distance from the centre of one welding end to the centre of a 90 °
l
mm
0BS5
elbow form BS5 at the welding ends
— distance from the centre of one welding end to the centre of a
90 ° elbow form BL at the welding ends
l
mm — distance from one welding end to the axis of the centre line for
1
elbow form BL-180
— face to face distance of reducer form RCL
— distance from the axis of centre line of the run to the face of
the branch outlet of tees
l
mm
2
— distance from one welding end to centre for elbow form BL-45
— face to face distance of reducer form REL
— difference between elbow form BL5–90 and BS5–90, BL-45
l
mm and BS-45, BL-90 and BS-90, BL-180 and BS-180 at the
3
welding ends aka tangent length
l
mm centre to centre distance for elbows 180 °
4
distance from the centre of one welding end to the centre of a 90 °
l
mm
1BL5
elbow form BL5 at the welding ends
distance from the extrados of a BS-45 or a BL-45 elbow to the face
l
mm
5
of the welding end
O % out-of-roundness
R, R , R
mm bending radius of elbows
BS5 BL5
specified wall thickness at the welding ends for T-pieces, elbows
s, s , s
mm
1 2
and reducers
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SIST EN 10374:2021
EN 10374:2021 (E)
5 Designation of fittings and steel grades
5.1 Designation of fittings
Fittings are designated by their name and the following parameters.
5.2 Elbow
Elbows are designated by the following parameters:
a) form (BS, BL, BS5, BL5);
b) angle (45 °, 90 °, 180 °);
c) tube dimensions (outside diameter and wall thickness).
5.3 Reducer
Reducer are designated by the following parameters:
a) form (RCS or RCL or RES or REL);
b) tube dimensions with major diameter (outside diameter and wall thickness);
c) tube dimensions with minor diameter (outside diameter and wall thickness).
5.4 T-piece
5.4.1 T-piece form TL and form TS
T-piece equal execution are designated by the following parameters:
a) form (TL or TS);
b) tube dimensions (outside diameter and wall thickness).
5.4.2 T-piece form TRL and form TRS
T-piece reduced execution are designated by the following parameters:
a) form (TRL or TRS);
b) tube dimensions with run diameter (outside diameter and wall thickness);
c) tube dimensions with branch diameter (outside diameter and wall thickness).
5.5 Designation of steel grades
The steel designation for fittings consists of the steel name in accordance with EN 10027-1 or the steel
number allocated in accordance with EN 10027-2.
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SIST EN 10374:2021
EN 10374:2021 (E)
6 Information to be supplied by the purchaser
6.1 Mandatory information
The following information shall be supplied by the purchaser at the time of enquiry and order:
a) quantity required (number of pieces);
b) reference to this document;
c) designation of fittings (see 5.1);
d) steel name or number according to EN 10088-1;
e) heat treatment (see 7.2.3).
6.2 Options
A number of options are specified in this document and listed below. If no options are indicated at the
time of enquiry and order the products shall be supplied in accordance with the basic specification (see
6.1).
a) Welds shall be finished by grinding and/or mechanical polishing (see 7.2.2).
b) Inspection document according to EN 10204 (see 9.2).
For supplementary information related to additional ordering information on fabrication options see
also Annex A (informative).
6.3 Examples of an order
Example 1
500 elbows in accordance with this document, form BS-90 for tube having an outside diameter of
41 mm and a wall thickness of 1,5 mm, made of steel grade 1.4301, with heat treatment “a”.
500 elbows — EN 10374 — BS-90 41x1,5 — 1.4301 — a.
Example 2
100 Reducers in accordance with this document, form REL, tube outside diameters of 85 mm and
70 mm and wall thickness of 2 mm, made of steel grade 1.4301, with heat treatment “a”.
100 reducers — EN 10374 — REL 85x2/70x2 — 1.4301 — a.
Example 3
300 T-pieces in accordance with document, form TS for tube having an outside diameter of 29 mm and
a wall thickness of 1, 5 mm, made of steel grade 1.4301, with heat treatment “u”, welds shall be finished
after welding (f), inspection certificate type 3.1 as per EN 10204 for the pre-material.
300 T-pieces — EN 10374 — TL 29x1,5 — 1.4301 — u — option 7.2.2 (f) — option 9.2 (a).
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SIST EN 10374:2021
EN 10374:2021 (E)
7 Requirements
7.1 Material
Fittings manufactured shall be in stainless steel.
The chemical composition of the stainless steel fittings shall be in accordance with EN 10088-1.
For guidance, the most commonly used materials are listed in Annex B (Table B.1).
7.2 Manufacturing Process
7.2.1 General
The method of manufacturing and the relevant starting product forms are left at the discretion of the
manufacturer. When manufacturing fittings from welded tubes, tubes shall be supplied and delivered in
accordance with EN 10357 or EN 10217-7. When manufacturing fittings from seamless tubes, tubes
shall be supplied and delivered in accordance with EN 10216-5. Sheet and strip used in manufacturing
shall be supplied and delivered in accordance with EN 10088-2 or EN 10028-7.
7.2.2 Welding
Welding processes used in the manufacturing of fittings may be Gas Tungsten Arc Welding (GTAW),
Laser Beam Welding, or Electron Beam Welding. Welds shall be left in the as-welded condition
(designator w) or finished after welding (designator f) (6.2, option a). If not specified at the time of
enquiry and order the condition of the welds is at the discretion of the manufacturer. Welds used in the
as-welded condition shall meet the acceptance criteria as per Table 2. Welds finished after welding shall
be flush with the base metal and shall meet the acceptance criteria as per Table 2. Welds finished after
welding shall be flush with the base metal and shall meet the acceptance criteria as per Table 2 and the
R -requirements of 7.2.4.
a
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SIST EN 10374:2021
EN 10374:2021 (E)
a
Table 2 — Visual examination acceptance criteria for groove welds on butt joints
Classification of imperfections as per EN ISO 6520-1
Requirements for fittings
Ref. No. Designation
100 Crack None accepted
104 Crater crack None accepted
2017 Surface pore None accepted
2025 End crater pipe (crater shrinkage, shrinkage hole) None accepted
Oxide islands are
301 Oxide island (slag inclusion) permitted as long as they
are adherent to the surface
401 Lack of fusion None accepted
4021 Incomplete root penetration None accepted
b
5011 Continuous undercut
None accepted
b
5012 Intermittent undercut None accepted
Shrinkage grooves
b
5013
None accepted
(undercuts visible on each side of the root run)
b c
502 Excessive weld metal (convexity, butt weld)
≤ 0,15 t
b c
504 Excessive penetration (convexity, butt weld) ≤ 0,15 t
b c
5072 Linear misalignment between tubes
≤ 0,15 t
b c
509 Sagging (weld metal collapse due to gravity) ≤ 0,15 t
b c
511 Incompletely filled groove (concavity, butt weld)
≤ 0,15 t
b c
515 Root concavity (concavity, butt weld) ≤ 0,15 t
516 Root porosity None accepted
601 Arc strike (stray arc) None accepted
602 Spatter None accepted
610 Temper colours (visible oxide film) None accepted
a
Examination of welds is limited to visual examination of surface imperfections and measurement of
geometric imperfections. Examination of imperfections inside the welds is outside the scope of this
document. See EN 13018 for guidelines on visual examination.
b
Acceptance criteria only applies to the inner surface.
c
t = nominal wall thickness, in case of different nominal wall thicknesses the thinner wall applies.
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SIST EN 10374:2021
EN 10374:2021 (E)
7.2.3 Heat treatment
Fittings made from welded tubes or sheets shall be supplied as per one of the following options:
Option I: Fittings with no heat treatment fabricated from non-heat treated (hard) tube and with no
heat treatment following the fabrication of the fittings.
Option II: Fittings with heat treatment as per one of the following cases.
a) made from heat treated tube with or without heat treatment following the fabrication of the
fittings;
b) made from non-heat treated tube with heat treatment following the fabrication of the fittings.
Designation “u” (unannealed) shall be used for option I, designation “a” (annealed) shall be used for
option II.
The selection between the options shall be agreed and specified at the time of order.
7.2.4 Surface finish and cleanliness
Surface roughness (Ra) as per EN ISO 4287 of inner and outer surfaces:
— inner surface Ra ≤ 0,8 μm;
— inner surface of longitudinal tube weld Ra ≤ 1,6 μm;
— outer surface Ra ≤ 1,6 μm.
Surface roughness (Ra) as per EN ISO 4287 of inner and outer surfaces in cold formed areas of elbows
and t-pieces:
— inner surface Ra ≤ 1,6 μm;
— inner surface of longitudinal tube weld Ra ≤ 3,2 μm;
— outer surface Ra ≤ 3,2 μm.
Surface roughness (Ra) as per EN ISO 4287 of welds finished after welding (6.2, option a):
— weld face and weld root: Ra ≤ 1,6 μm.
Measurement of surface roughness (Ra) shall be conducted in accordance with EN ISO 4288. Fittings
shall be supplied free of visible oil and grease. Visual examination shall be conducted in accordance
with EN 13018.
8 Dimensions and tolerances
8.1 Dimensions
8.1.1 General
It is not mandatory that the produced pieces correspond to the exact representation in the figures. Only
the dimensions given in the tables for the fittings shall be respected. If not specified in the tables or
figures tolerances refer to 8.2.
8.1.2 Elbow
Elbows form BS-45 and BL-45 are produced in accordance with Figure 1 and 2, respectively.
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SIST EN 10374:2021
EN 10374:2021 (E)

Figure 1 — Elbow form BS-45

Figure 2 — Elbow form BL-45
Elbows form BS-90 and BL-90 are produced in accordance with Figure 3 and 4 respectively.

Figure 3 — Elbow form BS-90

Figure 4 — Elbow form BL-90
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SIST EN 10374:2021
EN 10374:2021 (E)
Elbows form BS-180 and BL-180 are produced in accordance with Figure 5 and 6, respectively.

Figure 5 — Elbow form BS-180

Figure 6 — Elbow form BL-180
Elbows form BS5-90 and BL5-90 are produced in accordance with Figure 7 and 8, respectively.

Figure 7 — Elbow form BS5-90
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SIST EN 10374:2021
EN 10374:2021 (E)

Figure 8 — Elbow form BL5-90
Specific dimensions are listed in Tables 3, 4 and 5.
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SIST EN 10374:2021
EN 10374:2021 (E)
Table 3 — Specific dimensions Elbow
Series A
Dimensions mm
Pressure
b
a rating
BL-45 BL-90 BL-180 BS5-90 BL5–90
BS-45–90–180
Tube
D s
dimension
R = l l (l ) (l ) (l ) l l (l ) l l (l ) R = l R l (l )
R R R [MPa]
0 4 5 2 3 5 1 3 1 4 3 BS5 0BS5 BL5 1BL5 3
13 × 1,5 13 1,5 26 52 ± 1,5 23,0 26 35,8 25 65,7 26 51 25 26 51 52 ± 1,5 25 40 40 65 25
19 × 1,5 19 1,5 35 70 ± 1,5 31,5 35 39,5 25 74,1 35 60 25 35 60 70 ± 1,5 25 50 50 75 25
23 × 1,5 23 1,5 40 80 ± 1,5 36,4 40 41,6 25 79,1 40 65 25 40 65 80 ± 1,5 25 55 55 80 25
29 × 1,5 29 1,5 50 100 ± 1,5 45,6 50 60,7 40 113,9 50 90 40 50 90 100 ± 1,5 40 65 65 105 40 2,5
35 × 1,5 35 1,5 55 110 ± 2 51,3 55 62,8 40 119,6 55 95 40 55 95 110 ± 2 40 75 75 115 40
41 × 1,5 41 1,5 60 120 ± 2 56,9 60 64,9 40 125,3 60 100 40 60 100 120 ± 2 40 95 95 135 40
53 × 1,5 53 1,5 70 140 ± 2 68,2 70 69 40 136,5 70 110 40 70 110 140 ± 2 40 125 125 165 40
70 × 2,0 70 2 80 160 ± 2,5 81,3 80 73,1 40 149,5 80 120 40 80 120 160 ± 2,5 40 160 160 200 40
85 × 2,0 85 2 90 180 ± 2,5 93,7 90 92,3 55 187,6 90 145 55 90 145 180 ± 2,5 55 200 200 255 55 1,6
104 × 2,0 104 2 100 200 ± 3 107,5 100 96,4 55 201,3 100 155 55 100 155 200 ± 3 55 250 250 305 55
129 × 2,0 129 2 187,5 375 ± 3 178,2 187,5 135,2 57,5 276,4 187,5 245 57,5 187,5 245 375 ± 3 57,5 312,5 312,5 370 57,5
154 × 2,0 154 2 225 450 ± 3,5 213,5 225 178,2 85 358,7 225 310 85 225 310 450 ± 3,5 85 375 375 460 85 1
c c c c c c c c c c c c c c c c
204 × 2,0 204 2 300 284,3
c c c c c c c c c c c c c c c c
254 × 2,0 254 2 375 355,0 0,8
a
Up to DN 150.
b
Pressure ratings (max allowable working pressure) are applicable only to material types listed in Table B.1 (see Annex B) and have been calculated at a
temperature of 20 °C.
c
Not standardized.

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SIST EN 10374:2021
EN 10374:2021 (E)
Table 4 — Specific dimensions Elbow
Series C
Dimensions mm
Pressure
b
a rating
BL-45 BL-90 BL-180 BS5–90 BL5–90
BS-45–90
Tube
D s
dimension
R = l (l ) (l ) (l ) l l (l ) l l (l ) R = l R l (l )
R R R [MPa]
0 5 2 3 5 1 3 1 4 3 BS5 0BS5 BL5 1BL5 3
12,7 × 1,65 12,7 1,65 c c 28,58 57,15 45,4 102,1 28,58 76,2 47,6 57,15 76,2 114,3 ± 1,5 19,05 40 40 120 80
c c
19,05 × 1,65 19,05 1,65 28,58 57,15 45,4 104,3 28,58 76,2 47,6 57,15 76,2 114,3 ± 1,5 19,05 50 50 150 100
25,4 × 1,65 25,4 1,65 38,1 35,9 38,1 57,15 41,4 106,5 38,1 76,2 38,1 38,1 76,2 76,2 ± 1,5 38,1 52,5 52,5 152,5 100 2,5
38,1 × 1,65 38,1 1,65 57,15 53,9 57,15 63,5 39,8 121,9 57,15 95,25 38,2 57,15 114,3 114,3 ± 1,5 57,15 82,5 82,5 232,5 150
50,8 × 1,65 50,8 1,65 76,2 71,8 76,2 76,2 44,6 148,0 76,2 120,7 44,5 76,2 127 152,4 ± 2 50,8 115 115 265 150
63,5 × 1,65 63,5 1,65 95,25 89,8 95,25 85,73 46,2 168,8 95,25 139,7 44,5 95,25 146,05 190,5 ± 2 50,8 142,5 142,5 292,5 150
76,2 × 1,65 76,2 1,65 114,3 107,8 114,3 92,08 44,8 184,1 114,3 158,8 44,5 114,3 165,1 228,6 ± 2,5 50,8 175 175 325 150 1,6
101,6 × 2,11 101,6 2,11 152,4 143,7 152,4 114,3 51,2 231,0 152,4 203,2 50,8 152,4 215,9 304,8 ± 3 63,5 237,5 237,5 387,5 150
152,4 × 2,77 152,4 2,77 228,6 215,5 228,6 158,8 64,1 324,9 228,6 292,1 63,5 228,6 292,1 457,2 ± 3,5 63,5 357,5 357,5 557,5 200 1
a
BS-180 is not standardized.
b
Pressure ratings (max allowable working pressure) are applicable only to material types listed in Table B.1 (see Annex B) and have been calculated at a
temperature of 20°C.
c
Not standardized.

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