BS10 Flange Tables
BS10 flanges are the traditional British imperial flange standard, set out in the BS10 flange tables. We cover Tables D, E and F in slip-on, blind and threaded form. Table E is also stocked to suit hygienic O/D pipe and fittings.
BS10 Flange Tables
What is BS10?
BS10 is the British Standard for flanges and bolting for pipes, valves and fittings. BS10 flanges have been in use since 1904, and the standard was developed over time to meet increasing pressure demands.
It covers flanges for services such as steam, oil, compressed air and water. Many UK plants were built to it, which is why BS10 flanges are still needed for replacements.
What do the BS10 table letters mean?
Each BS10 table is identified by a letter, and each table sets the drilling and thickness of the flange for a given duty. The tables are different from each other, so a Table D flange isn’t the same as a Table E or Table F flange.
We cover Table D, Table E and Table F. If you’re replacing a flange, the table letter is the first thing to confirm.
How do you identify the right BS10 table?
Don’t worry if you’re not sure which table you have. The easiest place to start is the flange you’re replacing, because the table letter is usually marked on it or shown on the drawings.
If you can’t find it, we can work it out. Measure the outside diameter, the bolt circle diameter (the circle that runs through the centres of the bolt holes), the number and size of the bolt holes, and the thickness. Send us those details, and a photo too if you can, and we’ll help you find the match.
Should you choose BS10 or EN1092-1?
For new pipework, EN1092-1 flanges are the current European standard. BS10 tends to be specified when you need to match existing plant, so the right choice usually depends on what you’re connecting to.
Check which standard the existing flange follows before you order, as the drilling differs between standards.
Which BS10 flange types do we hold?
We hold BS10 flanges in three forms:
RFSO flanges, for welded slip-on joints
RFBL flanges, to close off the end of a line
SCRD flanges, to make a joint without welding
Table E flanges are stocked to suit hygienic O/D pipe and fittings, so they work alongside our hygienic fittings. All three forms sit in our flange range next to the EN1092-1 and ANSI B16.5 flanges, so you can compare options in one place.
What are the common ordering mistakes?
The most common mistake is assuming one table can stand in for another.
The second is ordering BS10 for new work when EN1092-1 is the current standard, and the third is mixing BS10 with ANSI B16.5 or EN1092-1 flanges.
What should you tell us when you enquire?
Each BS10 table sets its own drilling and thickness, so please tell us:
1. The table letter, either D, E or F.
2. The size.
3. The flange type, such as slip-on, blind or threaded.
4. The grade, either 304 or 316.
5. How many you need.
If you don’t know the table, send us the measurements of the flange you’re replacing, and a photo is useful too.
Frequently asked questions
Is BS10 the same as BS4504?
No. BS10 is the older British imperial standard, with sizes in inches. BS4504 was the metric British standard, and it has since been replaced by EN1092-1. If you’re working from a flange marked BS4504, our EN1092-1 flanges are the place to look.
Why can’t I swap a BS10 flange for an EN1092-1 flange?
The drilling is different between the two standards, so the bolt holes on a BS10 flange won’t line up with those on an EN1092-1 flange. If you want to change standard, you would need to replace the flange on the other side of the joint as well.
Do you supply BS10 flanges in 304 and 316?
Yes, we supply BS10 flanges in both 304 and 316 stainless steel. 304 suits general use, while 316 resists corrosion better, particularly from chlorides, so it’s the usual choice for harsher environments.
How can I tell whether my flange is BS10 or EN1092-1?
Start with the markings. A BS10 flange is usually marked with BS10 and its table letter, while an EN1092-1 flange carries a PN rating such as PN16. If there are no markings, measure the bolt circle diameter and count the bolt holes, then send us the details and we’ll tell you which standard it matches.
Contact Anglo Stainless for more information
If you’re not sure which BS10 table and type you need, contact us and a member of our team will be happy to help. You can also request our brochure using the form below.
What is BS10?
BS10 is the British Standard for flanges and bolting for pipes, valves and fittings. BS10 flanges have been in use since 1904, and the standard was developed over time to meet increasing pressure demands.
It covers flanges for services such as steam, oil, compressed air and water. Many UK plants were built to it, which is why BS10 flanges are still needed for replacements.
What do the BS10 table letters mean?
Each BS10 table is identified by a letter, and each table sets the drilling and thickness of the flange for a given duty. The tables are different from each other, so a Table D flange isn’t the same as a Table E or Table F flange.
We cover Table D, Table E and Table F. If you’re replacing a flange, the table letter is the first thing to confirm.
How do you identify the right BS10 table?
Don’t worry if you’re not sure which table you have. The easiest place to start is the flange you’re replacing, because the table letter is usually marked on it or shown on the drawings.
If you can’t find it, we can work it out. Measure the outside diameter, the bolt circle diameter (the circle that runs through the centres of the bolt holes), the number and size of the bolt holes, and the thickness. Send us those details, and a photo too if you can, and we’ll help you find the match.
Should you choose BS10 or EN1092-1?
For new pipework, EN1092-1 flanges are the current European standard. BS10 tends to be specified when you need to match existing plant, so the right choice usually depends on what you’re connecting to.
Check which standard the existing flange follows before you order, as the drilling differs between standards.
Which BS10 flange types do we hold?
We hold BS10 flanges in three forms:
RFSO flanges, for welded slip-on joints
RFBL flanges, to close off the end of a line
SCRD flanges, to make a joint without welding
Table E flanges are stocked to suit hygienic O/D pipe and fittings, so they work alongside our hygienic fittings. All three forms sit in our flange range next to the EN1092-1 and ANSI B16.5 flanges, so you can compare options in one place.
What are the common ordering mistakes?
The most common mistake is assuming one table can stand in for another.
The second is ordering BS10 for new work when EN1092-1 is the current standard, and the third is mixing BS10 with ANSI B16.5 or EN1092-1 flanges.
What should you tell us when you enquire?
Each BS10 table sets its own drilling and thickness, so please tell us:
1. The table letter, either D, E or F.
2. The size.
3. The flange type, such as slip-on, blind or threaded.
4. The grade, either 304 or 316.
5. How many you need.
If you don’t know the table, send us the measurements of the flange you’re replacing, and a photo is useful too.
Frequently asked questions
Is BS10 the same as BS4504?
No. BS10 is the older British imperial standard, with sizes in inches. BS4504 was the metric British standard, and it has since been replaced by EN1092-1. If you’re working from a flange marked BS4504, our EN1092-1 flanges are the place to look.
Why can’t I swap a BS10 flange for an EN1092-1 flange?
The drilling is different between the two standards, so the bolt holes on a BS10 flange won’t line up with those on an EN1092-1 flange. If you want to change standard, you would need to replace the flange on the other side of the joint as well.
Do you supply BS10 flanges in 304 and 316?
Yes, we supply BS10 flanges in both 304 and 316 stainless steel. 304 suits general use, while 316 resists corrosion better, particularly from chlorides, so it’s the usual choice for harsher environments.
How can I tell whether my flange is BS10 or EN1092-1?
Start with the markings. A BS10 flange is usually marked with BS10 and its table letter, while an EN1092-1 flange carries a PN rating such as PN16. If there are no markings, measure the bolt circle diameter and count the bolt holes, then send us the details and we’ll tell you which standard it matches.
Contact Anglo Stainless for more information
If you’re not sure which BS10 table and type you need, contact us and a member of our team will be happy to help. You can also request our brochure using the form below.
