The difference between ANSI/ASME B16.5 and B16.47 flange
American national standards ASME/ANSI B16.5 and B16.47 together cover pipe flanges up to NPS 60.ASME/ANSI B16.47 covers two series of flanges,ANSI/ASME B16.47 Series A which is equivalent to MSS SP-44 (the 1996 Edition of MSS SP-44 complies with B16.47 tolerances),and ANSI/ASME B16.47 Series B which is equivalent to API 605 (API 605 is now cancelled).
What is the difference between ANSI/ASME B16.5 flange and ANSI/ASME B16.47 flange?
Summary of flange sizes specified by ANSI/ASME B16.5 and B16.47 standards:
|ANSI/ASME B16.5||ANSI/ASME B16.47 Series A(MSS SP-44)||ANSI/ASME B16.47 Series B(API 605)|
|Nominal Pipe Size|
|<NPS 26||≥NPS 26||≥NPS 26|
|Class (lb)||Class (lb)||Class (lb)|
|Weld Neck Flange||150-2500||150-900||75-900|
|Slip on Flange||150-1500||–||–|
|Lap Joint Flange||150-2500||–||–|
|Socket Weld Flange||150-1500||–||–|
|Flat/raised Face||As above||As above||As above|
|Ring Joint Face||150-2500||300-900||300-900|
- MSS SP-44 flanges are designated Series A flanges in ASME B16.47.It also covers flanges in the range NPS 12 to 24,
these being equivalent to ASME/ANSI B16.5 flanges in the same range (except for the addition of NPS 22 in MSS SP-44).
- API 605 has been cancelled. API 605 flanges are designated Series B flanges in ASME B16.47. Ranges quoted are based on ASME B16.47 Series B.
- Dimensions not covered in this summary
As can be clearly seen from the above chart,ANSI/ASME B16.5 standard contain more types of flanges then ANSI/ASME B16.47,ANSI/ASME B16.47 standard only contain weld neck flange and blind flange.
ANSI/ASME B16.5 standard covers forged flanges from NPS 1/2 through NPS 24 metric/inch in pressure class 150 to class 2500.For bigger sizes,ANSI/ASME B16.47 standard for forged flanges in sizes NPS 26 through NPS 60 and in ratings Classes 75,150,300,400,600,and 900.
ANSI/ASME B16.47 Series A flanges are much thicker,heavier,stronger and cost more than ANSI/ASME B16.47 Series B flanges in the same size and pressure rating thus can withstand more external loading than Series B type. ANSI/ASME B16.47 Series B flanges need more but smaller fasteners (bolts & nuts) than Series A flanges and have a smaller bolt circle diameter than that of Series A flanges. The smaller bolt circle diameter results in less flange movement after installation.
Haihao Group can manufacture both types of ANSI/ASME B16.5 and B16.47 flanges,we supply forged flanges in different materials such as carbon steel,stainless steel,alloy steel.We also can supply forged flanges according to other standards like:ANSI/ASME B16.36,ANSI/ASME B16.48,AWWA C207,API 6A/6B/6BX,DIN 2527,DIN 2573,DIN 2576,DIN 2631,DIN 2632,DIN 2633,DIN 2634,DIN 2635,DIN 2566,DIN 2642,EN 1092,BS 4504,JIS B2220,GOST 12820,GOST 12821,SABS 1123,AS 1219 etc.
Carbon steel:ASTM A105,A350 LF2,SS400,P235GH,P250GH,C22.8,Q235,20#,16Mn.
Stainless steel:ASTM A182 F304,F304L,F316,F316L,F321,F347,F310,F44,F51 etc.
Alloy steel:ASTM A694 F42,F46,F52,F56,F60,F65,F70,A182 F5,F9,F91,F12,F11,F22 etc.
This is all the difference between ANSI/ASME B16.5 flanges and ANSI/ASME B16.47 flanges.If you want to know more about our high pressure forged flanges,please email us:firstname.lastname@example.org