Welded fittings for the food and chemical industries - Tees, bends and reducers for welding

This document specifies dimensions, tolerances, internal and external surface characteristics and marking of welded fittings for the food and chemical industry.

Formstücke zum Anschweißen in der Lebensmittel- und chemischen Industrie - T-Stücke, Bogen und Reduzierstücke zum Anschweißen

Dieses Dokument legt die Abmessungen, Toleranzen, Eigenschaften der Innen- und Außenflächen sowie die Kennzeichnung von geschweißten Formstücken für die Lebensmittel- und chemische Industrie fest.

Raccords soudés pour l'industrie alimentaire et chimique - Tés, coudes et réductions à souder

Le présent document spécifie les dimensions, tolérances, caractéristiques des surfaces internes et externes et marquages des raccords soudés pour les industries chimique et alimentaire.

Varjeni spojni elementi za živilsko in kemično industrijo - Odcepi, kolena in reducirni elementi za varjenje

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Due Date
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Completion Date
25-Aug-2021

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SLOVENSKI STANDARD
oSIST prEN 10374:2020
01-februar-2020
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: prEN 10374
ICS:
23.040.40 Kovinski fitingi Metal fittings
oSIST prEN 10374:2020 en,fr,de

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

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oSIST prEN 10374:2020
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oSIST prEN 10374:2020
DRAFT
EUROPEAN STANDARD
prEN 10374
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2019
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 Anschweißarmaturen in der Lebensmittel- und

chimique - Tés, coudes et réducteurs à souder chemischen Industrie - T-Stücke, Bogen und

Reduzierstücke zum Anschweißen

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 459/SC 10.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 10374:2019 E

worldwide for CEN national Members.
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oSIST prEN 10374:2020
prEN 10374:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 4

2 Normative references .................................................................................................................................... 4

3 Terms and definitions ................................................................................................................................... 4

4 Symbols and abbreviations ......................................................................................................................... 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 (dimension) .................................................................................................................................... 22

8.2 Tolerances ...................................................................................................................................................... 26

8.2.1 Dimensional tolerances ............................................................................................................................. 26

8.2.2 Form tolerances ............................................................................................................................................ 28

9 Examination ................................................................................................................................................... 32

9.1 Examination criteria ................................................................................................................................... 32

9.2 Examination documents ............................................................................................................................ 33

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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European foreword

This document (prEN 10374:2019) 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 document is currently submitted to the CEN Enquiry.
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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 10027-1, Designation systems for steels — Part 1: Steel names
EN 10027-2, Designation systems for steels — Part 2: Numerical system

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 13480 (all parts), Metallic industrial piping

EN 10357, Austenitic, austenitic-ferritic and ferritic longitudinally welded stainless steel tubes for the food

and chemical industry

EN ISO 4287, Geometrical product specifications (GPS) — Surface texture: Profile method — Terms,

definitions and surface texture parameters (ISO 4287)

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 http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
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3.1
elbow

bend fitting to allow a change direction of the pipeline with a radius 45°, 90° or 180°

3.1.1
elbow form BS (short execution)
elbows with standard welding ends
3.1.2
elbow form BL (long execution)
elbows with prolonged welding ends
3.2
reducer
fitting that reduces the pipeline size from larger to a smaller diameter
3.2.1
reducer form RCS (short type)
reducer with concentric diameters with short length
3.2.2
reducer form RCL (long type)
reducer with concentric diameters with long length
3.2.3
reducer form RES (short type)
reducer with eccentric diameters with short length
3.2.4
reducer form REL (long type)
reducer with eccentric diameters with long length
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 diameter connections
3.3.2
T-piece form TS
T-piece with a short branch and equal tube diameter connections
3.3.3
T-piece form TRL

T-piece with the branch tube diameter connection smaller than the run tube diameter connections

3.3.4
T-piece form TRS

T-piece with branch short length and the branch tube diameter connection smaller than the run tube

diameter connections
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4 Symbols and abbreviations

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, OD mm specified outside diameter for T-pieces and elbows
− 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 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
0 BS5
90° 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
mm − distance from one welding end to the axis of the centre line
for elbow form BL-180
− face to face distance of reducer form RK
− distance from the axis of centre line of the run to the face
of the branch outlet of tees
mm − distance from one welding end to centre for elbow form
BL-45
− face to face distance of reducer form RE
− difference between elbow form BL5–90 and BS5–90, BL-45
mm and BS-45, BL-90 and BS-90, BL-180 and BS-180 at the
welding ends aka tangent length
mm centre to centre distance for elbows 180°
distance from the centre of one welding end to the centre of a
1BL5
90° elbow form BL5 at the welding ends
distance from the extrados of a BS-45 or a BL-45 bend to the
face 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,
s, s , s
1 2
elbows and reducers
WT mm wall thickness of T-piece
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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
The 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
The 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
The 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
The T-piece reduced execution are designated by the following parameters:
a) form (TRL or TRS);
b) tube dimensions with major diameter (outside diameter and wall thickness);
c) tube dimensions with minor diameter (outside diameter and wall thickness).
5.5 Designation of steel grades

For fittings covered by this document the steel designation 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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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 standard and listed below. If the purchaser does not indicate a

wish to implement any of these options 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 paragraph 7.2.2);

b) Inspection document according to EN 10204 (see paragraph 9.2).
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 for tubes having an outside diameter 85 and

70 mm- and a 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”

300 T-pieces — EN 10374 — TL 29x1.5 — 1.4301 — u — option 7.2.2 (f) — option 9.2 (a).

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7 Requirements
7.1 Material
Fittings manufactured according with this document shall be in stainless steel.

The chemical composition of the stainless steel fittings shall be in accordance with the 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) (paragraph 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 meet the R requirements of paragraph 7.2.4.
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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 permitted as long
301 Oxide island (slag inclusion)
as they are adherent to the surface
401 Lack of fusion None accepted
4021 Incomplete root penetration None accepted
5011 Continuous undercut
None accepted
5012 Intermittent undercut None accepted
Shrinkage grooves
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

Examination of welds is limited to visual examination of surface imperfections and measurement of geometric

imperfections. Examination of inner imperfections is outside the scope of this document.

Acceptance criteria only applies to the i/d surface

t = nominal wall thickness, in case of different nominal wall thicknesses the thinner wall applies

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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 upon the purchase 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 (paragraph 6.2, option a):

— weld face and weld root: Ra ≤ 1.6 μm

Visual examination and measurement of surface roughness (Ra) shall be conducted in accordance with

EN ISO 4288. Fittings shall be supplied free of visible oil and grease.
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 paragraph 8.2.
8.1.2 Elbow

Elbows with a bending radius of 45°, form BS-45 (short execution) and BL-45 (long execution), are

produced in accordance with Figure 1 and 2 respectively.
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Figure 1 — Elbow form BS-45
Figure 2 — Elbow form BL-45

Elbows with a bending radius of 90°, form BS-90 (short execution) and BL-90 (long execution) 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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Elbows with a bending radius of 180° (return bends), form BS-180 (short execution) and BL-180 (long

execution) are produced in accordance with Figure 5 and 6 respectively.
Figure 5 — Elbow form BS-180
Figure 6 — Elbow form BL-180

Elbows with a bending radius of 90°, form BS5-90 (short execution) and BL5-90 (long execution) are

produced in accordance with Figure 7 and 8 respectively.
Figure 7 — Elbow form BS5-90
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Figure 8 — Elbow form BL5-90
Specific dimensions are listed in Tables 3, 4 and 5.
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Table 3 — Specific dimensions Elbow
Series A
Dimensions [mm]
Pressure
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
up to DN 150

Pressure ratings are applicable only to material types listed in Table B.1 (see Annex B) and have been calculated at a temperature of 20°C.

Not standardized
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Table 4 — Specific dimensions Elbow
Series C
Dimensions [mm]
Pressure
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
c c

12,7 × 1,65 12,7 1,65 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

BS-180 is not standardized

Pressure ratings are applicable only to material types listed in Table B.1 (see Annex B) and have been calculated at a temperature of 20°C.

Not standardized
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Table 5 — Specific dimensions Elbow
Series D
Dimensions [mm] Pressur
e rating
BS-45-90–180 BL-45 BL-90 BL-180 BS5-90 BL5–90
Tube
dimensio D s
R = l R l (l
BS5 0BS BL 1BL 3
R = l l (l ) (l ) (l ) l l (l ) l l (l )
n R R R [MPa]
0 4 5 2 3 5 1 3 1 4 3
5 5 5 )
14, 37, 27,

25 × 1,2 25 1,2 37,5 75 ± 1,5 35,4 37,5 30,2 60,4 37,5 65 27,5 65 75 ± 1,5 75 75 115 40

7 5 5
17,

38 x1,2 38 1,2 57 114 ± 1,5 53,7 57 41,3 83,9 57 85 28 57 85 114 ± 1,5 28 82 82 138

...

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