Spaenaur Catalog 14

Disc Springs (Washers) Rondelles à ressort (Belleville)

Inch Pouce

STAINLESS STEEL for Flange Applications

Spring Discs are an elastic mechanical element. When used in bolt joints that are subject to thermal or mechanical shock, they deflect and move with the bolted joint. Hence, they compensate for developed looseness. The reactive power of the spring disc serves to keep the bolt joint tight under all conditions. Principal applications include piping construction, compression joints, steam piping joints, valve and pump connections, and others in the petrochemical field. A principal cause of flange leakage is abnormally high loads produced by thermal expansion and contraction of a bolted joint. Generally, flanges are under static load conditions. However, in large piping systems, there may also be mechanical shock from compressor related piping. Thermal and mechanical shock differential can cause variation and yielding in bolt loads. To protect against these conditions, always use spring discs under the nut or bolt head. Pre-stressing or torquing the bolt at factory installation is not sufficient to protect the flange joint under unexpected temperature variations and mechanical shock loads in the field. By absorbing peak stresses, spring discs prevent damage to the bolt, gasket, and joint.

d

O.H.

h

t

D

D

2/parallel Cross-section

Use with Bolt Dia.

*LOAD AT FLAT P (lbs.)

INCH DIMENSIONS

PKG QTY.

SPAENAUR

t

Inch mm D d

( ± 10%) O.H.

No.

681-800 681-801 681-802 681-803 681-804 681-805 681-806 681-807 681-808 681-809 681-810 681-811 681-812 681-813 681-814

1/2 " 5/8" 3/4" 7/8"

M1 2 M1 6 M22 M26

.900 .51 5 1.14 5 .656

.089 .100 2100 50

.12 5

.14 3

6000 50

M2 0 1.36 5 .78 1 .131 .150 5100 50

Series Stack

1.58 5 1.80 5

.90 6

.160 .180 7100 50

1 "

1.03 2

.16 8 .18 7

.19 5 .21 7 .225

8600 10 10600 10 10500 10

1-1/8 " M2 9 2.020 1.15 6 1-1/4 " M32 2.24 0 1.281 .190

1-3/8 " M35 2.45 0 1.40 6 .25 0 .290 23000 10

1-1/2 " M38 2.68 0 1.531

.25 0 .290 19000 10

1-5/8 " M42 1-3/4 " M45

2.950 1.68 7 .262 3.170 1.81 2 .28 1

.30 7

20000 1

1 1 1 1

.32 9 23000

1-7/8 " M48 3.38 0 1.93 7

.300

.353

28000 32000 39000 48000

2"

M52

3.600 2.06 2

.31 8 .375

2-1/4 " M58

4.040 2.31 2 .356

.41 8

2.562 1 *For single spring disc; for higher loads, use parallel stacks. .39 4 .464

2-1/2 " M64 4.47 0

Spring Discs make secure, reliable bolted connections and flanges, as used in: ● Piping construction ● Compression joints ● Steam piping joints ● Petrochemical field applica tions ● Valve and pump connections

MATERIAL: STAINLESS: 17-7PH (Armco) precipitation hardened Hardness: Rc 40-45 TEMPERATURE RANGE: -220 o C to +300 o C. Note: Load calculated for 17-7PH stainless steel with large radii. R = t 4 For higher temperatures, to +600 o C, we can supply Inconel X-750 (non-standard). Prices on application. Note: For normal operating temperatures, we can supply Chrome Vanadium SAE 6150. Prices on request. TOLERANCE: OD - Plus .000/Minus 1.5% x OD (Designed for standard flange spot face diameter.) ID - Minus .000/Plus 1.5% ID THICKNESS - Tolerance may vary ± 10% of nominal thickness shown. LOAD - Plus/Minus 20% of nominal shown. (When ordering, ALWAYS specify materials after part number.) LOAD CHANGE (DECREASE) ( ▲ P) VS. TEMPERATURE

Material LOAD CHANGE (DECREASE) ( ▲ P) VS. TEMPERATURE Temperature 21 o C (70 o F) 205 o C (400 o F) 302 o C (575 o F) 399 o C (750 o F) 455 o C (850 o F) E E ▲ P E ▲ P E ▲ P E ▲ P psi•10 6 psi•10 6 % psi•10 6 % psi•10 6 % psi•10 6 % SAE6150 3 0 28.5 5 27.5 8.3 - - - - 17-7PH 28 24.4 6.2 23.2 10.8 - - - - Temperature 21 o C (70 o F) 121 o C (250 o F) 260 o C (500 o F) 538 o C (1000 o F) 649 o C (1200 o F) 3 1 30. 8 .6 28.7 7.4 25 19. 4 23 25.8 ▲ P = Load Change E = Modulus of Elasticity For flanges subject to high temperature conditions, the relative load loss resultant is shown in the table below. Therefore, it may be necessary to use two discs in parallel to compensate and achieve adequate clamping load. (See illustration at upper right.) Inconel X-750

CATALOG 14

Typical Application of Flanged (bolted) Piping

D64

P: 1-800-265-8772 F: 1-888-252-6380 www. F: 1-888-252-6380 service@spaenaur.com © 2018 Spaenaur Inc. All rights reserved. Catalog may not be reproduced, in whole or in part, without the written permission of Spaenaur Inc. Subject to Catalog Terms and Conditions of Use available at Spaenaur.com and on page TC2 and TC3 at the back of this catalog. © 2018 Spaenaur Inc. Tous droits réservés. Le catalogue ne peut être reproduit, en tout ou en partie, sans l’autorisation écrite de Spaenaur Inc. L’utilisation est soumise aux Conditions d’utilisation du Catalogue disponibles sur Spaenaur.com et à la page TC4 et TC5 à la fin de ce catalogue. .com 16 Jan 2018