April 1998
Ho clamps
Spring Band Clamps (SBC)
Part 3: System: spring band clamp/ho/spigot
DIN 3021-3
ICS 21.060.70
Ho clamps - Spring band clamp - Part 3: System: Spring band clamp/ho/spigot
Colliers de rrage - Colliers de ressort - Part 3: Systéme: Collier de ressort-tuyau-manchon Foreword This standard draft was drawn up by the study group Standardisation of Spring Band Clamps in the Standards Committee Iron, Sheet and Metalware (NA EBM).
DIN 3021
Ho clamps - spring band clamps (SBC) compri:
Part 1: Dimensions, designation, materials
Part 2: Technical delivery conditions Part 3: System: spring band clamp/ho/spigot Annex A is for information.
Warning remarks about application
This standard draft is submitted to the public for checking and comments. Since the intended standard may differ from the prent version, application of this draft shall be agreed upon in a special form. Plea refer comments to Normenausschuss Ein-, Blech- und Metallwaren (NA EBM) in DIN, Kairswerther Str. 135,D-40474 Duesldorf.1 Field of application
This standard is applicable to ho/spigot connections with spring band clamps in accordance with DIN 3021-1 and stipulates the dimensions and execution of ho and spigot.2 References to standards
This standard contains dated or undated references, as well as definitions from other publications. Such references to standards are quoted in the pertinent passages in the text, and the publications are listed below. With dated references, subquent amendments or revisions of the publications only belong to this standard if they are included by amendments or revisions.
With undated references the latest edition of the publication referred to shall be applicable.DIN 3021-1
Ho clamps - spring band clamps - Part 1: Dimensions, marking, materials, types.DIN 73411-1
Coolant water lines in vehicles; hos and ho elbows;Part 1: Dimensions, material, designation DIN 73379-1
Fuel hos – Part 1: Dimensions, material, designation DIN 71550
Crimping for ho connections in pipelines Other standards:DIN 73411-2
Coolant water lines in vehicles; hos and ho elbows;Part 2: Requirements, testing DIN 73379-2
句子翻译
Fuel hos – Part 2: Requirements, testing
Normenausschuß Ein-, Blech- und Metallwaren (NA EBM) im DIN
Deutsches Institut für Normung e.V.
To be cont. Pages 2 to 6
快速喉箍
弹簧喉夹系统
软管
龙头
前言
第一部份：尺寸、名称、材料第二部份：技术交货条件应用领域
Page 2DIN 3021-3
3 System:
3.1 Spring band clamp/ho/spigot
Correct functioning of the spring band clamp/ho/spigot system assured by veral characteristics that have been specifically matched to agree with each other:
− clamping forces
for the aling effect including long-time function,− pull-off forces
to take up dynamic axial loads are to be tested on a ca by ca basis,− geometrical dimensions for safe asmbling.
Minimum requirements are made on the geometry of the hos and spigots to ensure leak-proofness in the system. To attain the minimum requirements, the dimensions, tolerances, mould offt, parting edge and waviness of the spigot and ho must be co-ordinated with each other.
Selection of the spigot form is dependent on the material and production procedure for the spigot.How the minimum requirements are co-ordinated is described below.3.2 Spigots for hous accordance with table 1Dimensions in millimetres
The spigots need not fall in line with the pictorial reprentation, only the dimensions specified having to be maintained
Form A 3)
(ideal form)
Figure 1:Cut metal spigots and plastic injection-moulded spigots
An example of how a spigot Form A with spigot diameter ds = 20 mm is entered on a drawing:
Form
e Page 4 for footnotes
prents
Z
亮晶晶的拼音Z
平台上的孩子L min 1)
ød w 2)
ød s
±3°
A
Page 3DIN 3021-3
Form B 3) 4)scoiattolo
Figure 2:Plastic spigot
Form C 3) 5)
Figure 3:Spigot form for beads on pipelines (similar to DIN 71 550)3.3 Spigot for fuel systems
Form D 3)
Figure 4: Only for hos with di=7,3±0,2; p=3,5±0,3 and clamp DIN 3021 - B - 14x12e Page 4 for footnotes
Zwow是什么意思
±3°
Z
R2,5
3.3 Ho
The ho dimensions specified in Table 1 correspond to DIN 73411-1 (Table 1) and DIN 73379-1(Table 1) 3.3.1 Minimum ho requirement雅思考试报名网
applies to both ends of the ho
Figure 5: Illustration - ho
1) In this area for forms A, B and C:
−Rmax = 50 µm
−W (waviness) + Rmax = max. 100 µm
w ave length min. 5 mmglobe
tecom−longitudinal scorings inadmissible
−Permissible out-of-roundness:0.2 mm for d s≤ 25
0.3 mm for d s >25
−admissible mould offt and parting edge:0.05 mm for d s≤ 20
0.1 mm for d s >20
2) The bead diameter is determined according to the following equations:
d s≤ 25:d w = d s × 1.12
d s >25 bis ≤ 37: d w= d s + 2.5
d s > 37:d w= d s + 3
3) Sharp edges are inadmissible.
4) For ds > 20 mm Form A is preferable when the pull-of f force is subject to more demanding requirements.
5) ds >20 mm is inadmissible.
6) Admissible mould offt and parting edge max. 0.04 mm. Only rounded rais are admissible.
7) Applicable for the push-on length > 28 mm is:
−longitudinal scorimgs are inadmissible.
−Admissible waviness 0.3 mm within ¼ of the circumference.
For testing, a test mandrel falling in line with the maximum internal diameter is to be inrted into the ho.
Table 1: Dimensions spring band clamp/ho/spigot
Dimensions in millimetres
商务英语学习网站Spring band clamp
Ho
Spigot
L min
internal diameter
external diameter
bead diameter
nominal diameter
d n minimal functional diameter
d f
d i limit dimens.
wall thickness
p
d s limit dimens
d w limit dimens
f+1
x
c=12c=15
1312,76,56,57,31413,78891514,78,58,59,61615,79,59,510,71716,3101011,21817,3111112,34,0
1918,3121213,52019,3131314,600,15
2120,31414± 0,2
15,7- 0,25
2221,315-0,53,5± 0,4
1516,82322,316-1
1618,02423,3171719,123
2524181820,22625191921,32726202022,42827212123,52928222224,53029232325,53231252527,56
3433262628,53534272729,5203635282830,50,3
383730-0,54± 0,530± 0,3
32,5403932-1,3
3234,54240,5343436,504341,5353537,5- 0,5
4442,5363638,54644,5373739,54745,53838414947,54040435048,54141445149,54242455351,54444475553,5464,5± 0,5464925
6058,55050537
6563,55555587068,560606307573,565-0,56568+0,5
8078,570-1,7
70738583,575757890
88,5
80
80
83
