- Email: [email protected]
Standards for rubber materials for seals
General news
International exhibition on plant maintenance The I s t I n t e r n a t i o n a l E x h i b i t i o n a n d C o n g r e s s o n P l a n t M a i n t e n a n c e , S m i '95, is to t a k e p l a c e from 20 to 23 S e p t e m b e r 1995 in B o l o g n a , Italy. S m i '95 i n t e n d s to p r o v i d e i m p o r t a n t c o m m e n t a n d a n s w e r s to q u a l i t y a n d p l a n t m o d e r n i s a t i o n n e e d s , stemming from stricter environmental and loss prevention laws and regulations, and from the i m p l e m e n t a t i o n of c o m p a n i e s ' q u a l i t y a n d reengineering programmes. Industry indicates more m o n e y will b e s p e n t for o n g o i n g m a i n t e n a n c e a c t i v i t i e s such as corrosion control and predictive maintenance. It is a l r e a d y well k n o w n t h a t p l a n t m a i n t e n a n c e is a k e y f a c t o r for t h e H i g h - T e c h m a n u f a c t u r i n g i n d u s t r y : m a i n t e n a n c e s p e n d i n g for c h e m i c a l a n d p e t r o c h e m i c a l w a s m o r e t h a n U S $ 2 6 billion in 1994, U S $ 1 . 6 b i l l i o n over e s t i m a t e d 1994 e x p e n d i t u r e s . More t h a n US$ l 0 b i l l i o n w a s a l l o c a t e d for e q u i p m e n t and materials. M a i n t e n a n c e s p e n d i n g is over 19 0 0 0 billion Life in Italy a n d m o r e t h a n 7 5 0 0 b i l l i o n Life is a l l o c a t e d for e q u i p m e n t m a t e r i a l s . C o m p l e x i t y a n d a d v a n c e d age of p l a n t s r e q u i r e s d i f f e r e n t k i n d s of m a i n t e n a n c e o p e r a t i o n s : m a i n t e n a n c e s p e n d i n g for t h e i r o n i n d u s t r y c o v e r s 5.1%, 4.2% for c h e m i c a l a n d p e t r o c h e m i c a l , 3.3% for p a p e r i n d u s t r y a n d 1.8% for m e c h a n i c a l i n d u s t r y . S m i '95 is a i m e d p a r t i c u l a r l y at people within industry who deal with components and instrumentation purchasing, maintenance service and e n v i r o n m e n t a l care. Contact-" M a n u t e n z i o n e C o n g r e s s S e c t i o n , 1 - 2 0 0 9 0 S e g r a t e , MI, C e n t r o C o m m e r c i a l e M i l a n o S a n F e l i c e , I t a l y . Tel: + 3 9 2 7 5 3 2 7 5 4 ; Fax: + 3 9 2 7 5 3 2770.
Grade H Grade M Grade L
JTCD JCTE JCTA
P e r m a n i t e GT S t a n d a r d PTFE T a p e
C o n t a c t : TBA S e a l i n g M a t e r i a l s Ltd, PO B o x 2 I, R o c h d a l e , L a n c s O L I 2 7EU, UK. Tel: + 4 4 1 7 0 6 7 1 5 0 0 0 ; Fax: + 4 4 1 7 0 6 4 6 0 5 5 .
S t a n d a r d s for rubber materials for s e a l s The B r i t i s h S t a n d a r d s I n s t i t u t i o n h a s a n n o u n c e d t h e p u b l i c a t i o n of a n e w s t a n d a r d , BS EN 5 4 9 : 1 9 9 5 -
Speclficatlon for rubber materlals for seals and dlaphragms for gas appliances and gas equipment. The s t a n d a r d gives r e q u i r e m e n t s a n d t e s t m e t h o d s for r u b b e r m a t e r i a l s for u s e in g a s a p p l i a n c e s and equipment. It a l s o gives m e t h o d s for v e r i f y i n g m a t e r i a l s f r o m w h i c h c o m p o n e n t s a r e m a n u f a c t u r e d . It s u p e r s e d e s t h e s t a n d a r d BS05: 1984. In a d d i t i o n , B S EN 6 0 0 6 8 - 2 - 1 7 : 1 9 9 5 o u t l i n e s a t e s t c a l l e d T e s t Q, Sealing. T h i s gives p r o c e d u r e s for various tests using different conditioning procedures a p p r o p r i a t e for d i f f e r e n t a p p l i c a t i o n s . Two m e t h o d s of leak detection are described; internal: detection m e a s u r i n g c h a n g e s of e l e c t r i c c h a r a c t e r i s t i c s a n d e x t e r n a l d e t e c t i o n m e a s u r i n g t h e e s c a p e of t h e t e s t m e d i u m t h r o u g h a leak. T h i s s t a n d a r d s h o u l d b e r e a d in c o n j u n c t i o n w i t h B S 2 0 0 1 : P a r t 2.1Q: 1981. Contact: British Standards Institution, 389 C h i s w i c k H i g h R o a d , L o n d o n W 4 4AL, UK. Tel: + 4 4 1 8 1 9 9 6 7 4 4 4 ; Fax: + 4 4 1 8 1 9 9 6 7 3 7 3 .
Materials and trademarks
PTFE thread seal tape complies with British Standard TBA S e a l i n g M a t e r i a l s Ltd's r a n g e of u n s i n t e r e d PTFE thread seal tapes complies with the newly issued B r i t i s h S t a n d a r d - - BS 7 7 8 6 : 1 9 9 5 ( s p e c i f i c a t i o n for u n s l n t e r e d PTFE t a p e : G e n e r a l r e q u i r e m e n t s : r e l e a s e d o n 16 J u n e 1995). T h i s s t a n d a r d s u p e r c e d e s BS 4 3 7 5 : 1 9 6 8 a n d a l l o w s for t h r e e g r a d e s of m a t e r i a l w h i c h h a v e h i g h (H); m e d i u m (M) a n d low (L) d e n s i t i e s . The following m a t e r i a l s from TBA S e a l i n g Materials comply with these grades:
Sealing Technology No. 19
A n u m b e r of p r o p r i e t a r y n a m e s h a v e b e e n u s e d in t h i s i s s u e of Sealing Technology. The n a m e s a r e r e g i s t e r e d t r a d e m a r k s of t h e c o m p a n i e s l i s t e d below. Burgmann Busak & Shamban D u r a m e t a l l i c UK
The F r e u d e n b e r g G r o u p J a m e s W a l k e r & Co Ltd John Crane Loctite UK P o l y m e r T e c h n o l o g y Ltd Safematic Oy V u l c a n E n g i n e e r i n g Ltd
M48 I, M461 Turcon Variseal X-series VRA s e r i e s RA-S s e a l Simriz Simwhite Simmer rings Supagraf Ribbonpak RibbonPak M Type 2 8 0 0 E F l a n g e s e a l a n t s : 509, 510, 518, 573 ProMod SB2 V u l c a n VP2, VP3
7
International exhibition on plant maintenance The I s t I n t e r n a t i o n a l E x h i b i t i o n a n d C o n g r e s s o n P l a n t M a i n t e n a n c e , S m i '95, is to t a k e p l a c e from 20 to 23 S e p t e m b e r 1995 in B o l o g n a , Italy. S m i '95 i n t e n d s to p r o v i d e i m p o r t a n t c o m m e n t a n d a n s w e r s to q u a l i t y a n d p l a n t m o d e r n i s a t i o n n e e d s , stemming from stricter environmental and loss prevention laws and regulations, and from the i m p l e m e n t a t i o n of c o m p a n i e s ' q u a l i t y a n d reengineering programmes. Industry indicates more m o n e y will b e s p e n t for o n g o i n g m a i n t e n a n c e a c t i v i t i e s such as corrosion control and predictive maintenance. It is a l r e a d y well k n o w n t h a t p l a n t m a i n t e n a n c e is a k e y f a c t o r for t h e H i g h - T e c h m a n u f a c t u r i n g i n d u s t r y : m a i n t e n a n c e s p e n d i n g for c h e m i c a l a n d p e t r o c h e m i c a l w a s m o r e t h a n U S $ 2 6 billion in 1994, U S $ 1 . 6 b i l l i o n over e s t i m a t e d 1994 e x p e n d i t u r e s . More t h a n US$ l 0 b i l l i o n w a s a l l o c a t e d for e q u i p m e n t and materials. M a i n t e n a n c e s p e n d i n g is over 19 0 0 0 billion Life in Italy a n d m o r e t h a n 7 5 0 0 b i l l i o n Life is a l l o c a t e d for e q u i p m e n t m a t e r i a l s . C o m p l e x i t y a n d a d v a n c e d age of p l a n t s r e q u i r e s d i f f e r e n t k i n d s of m a i n t e n a n c e o p e r a t i o n s : m a i n t e n a n c e s p e n d i n g for t h e i r o n i n d u s t r y c o v e r s 5.1%, 4.2% for c h e m i c a l a n d p e t r o c h e m i c a l , 3.3% for p a p e r i n d u s t r y a n d 1.8% for m e c h a n i c a l i n d u s t r y . S m i '95 is a i m e d p a r t i c u l a r l y at people within industry who deal with components and instrumentation purchasing, maintenance service and e n v i r o n m e n t a l care. Contact-" M a n u t e n z i o n e C o n g r e s s S e c t i o n , 1 - 2 0 0 9 0 S e g r a t e , MI, C e n t r o C o m m e r c i a l e M i l a n o S a n F e l i c e , I t a l y . Tel: + 3 9 2 7 5 3 2 7 5 4 ; Fax: + 3 9 2 7 5 3 2770.
Grade H Grade M Grade L
JTCD JCTE JCTA
P e r m a n i t e GT S t a n d a r d PTFE T a p e
C o n t a c t : TBA S e a l i n g M a t e r i a l s Ltd, PO B o x 2 I, R o c h d a l e , L a n c s O L I 2 7EU, UK. Tel: + 4 4 1 7 0 6 7 1 5 0 0 0 ; Fax: + 4 4 1 7 0 6 4 6 0 5 5 .
S t a n d a r d s for rubber materials for s e a l s The B r i t i s h S t a n d a r d s I n s t i t u t i o n h a s a n n o u n c e d t h e p u b l i c a t i o n of a n e w s t a n d a r d , BS EN 5 4 9 : 1 9 9 5 -
Speclficatlon for rubber materlals for seals and dlaphragms for gas appliances and gas equipment. The s t a n d a r d gives r e q u i r e m e n t s a n d t e s t m e t h o d s for r u b b e r m a t e r i a l s for u s e in g a s a p p l i a n c e s and equipment. It a l s o gives m e t h o d s for v e r i f y i n g m a t e r i a l s f r o m w h i c h c o m p o n e n t s a r e m a n u f a c t u r e d . It s u p e r s e d e s t h e s t a n d a r d BS05: 1984. In a d d i t i o n , B S EN 6 0 0 6 8 - 2 - 1 7 : 1 9 9 5 o u t l i n e s a t e s t c a l l e d T e s t Q, Sealing. T h i s gives p r o c e d u r e s for various tests using different conditioning procedures a p p r o p r i a t e for d i f f e r e n t a p p l i c a t i o n s . Two m e t h o d s of leak detection are described; internal: detection m e a s u r i n g c h a n g e s of e l e c t r i c c h a r a c t e r i s t i c s a n d e x t e r n a l d e t e c t i o n m e a s u r i n g t h e e s c a p e of t h e t e s t m e d i u m t h r o u g h a leak. T h i s s t a n d a r d s h o u l d b e r e a d in c o n j u n c t i o n w i t h B S 2 0 0 1 : P a r t 2.1Q: 1981. Contact: British Standards Institution, 389 C h i s w i c k H i g h R o a d , L o n d o n W 4 4AL, UK. Tel: + 4 4 1 8 1 9 9 6 7 4 4 4 ; Fax: + 4 4 1 8 1 9 9 6 7 3 7 3 .
Materials and trademarks
PTFE thread seal tape complies with British Standard TBA S e a l i n g M a t e r i a l s Ltd's r a n g e of u n s i n t e r e d PTFE thread seal tapes complies with the newly issued B r i t i s h S t a n d a r d - - BS 7 7 8 6 : 1 9 9 5 ( s p e c i f i c a t i o n for u n s l n t e r e d PTFE t a p e : G e n e r a l r e q u i r e m e n t s : r e l e a s e d o n 16 J u n e 1995). T h i s s t a n d a r d s u p e r c e d e s BS 4 3 7 5 : 1 9 6 8 a n d a l l o w s for t h r e e g r a d e s of m a t e r i a l w h i c h h a v e h i g h (H); m e d i u m (M) a n d low (L) d e n s i t i e s . The following m a t e r i a l s from TBA S e a l i n g Materials comply with these grades:
Sealing Technology No. 19
A n u m b e r of p r o p r i e t a r y n a m e s h a v e b e e n u s e d in t h i s i s s u e of Sealing Technology. The n a m e s a r e r e g i s t e r e d t r a d e m a r k s of t h e c o m p a n i e s l i s t e d below. Burgmann Busak & Shamban D u r a m e t a l l i c UK
The F r e u d e n b e r g G r o u p J a m e s W a l k e r & Co Ltd John Crane Loctite UK P o l y m e r T e c h n o l o g y Ltd Safematic Oy V u l c a n E n g i n e e r i n g Ltd
M48 I, M461 Turcon Variseal X-series VRA s e r i e s RA-S s e a l Simriz Simwhite Simmer rings Supagraf Ribbonpak RibbonPak M Type 2 8 0 0 E F l a n g e s e a l a n t s : 509, 510, 518, 573 ProMod SB2 V u l c a n VP2, VP3
7