The Ultimate Guide To Titanium Flanges: Everything You Need to Know

This article is a complete guide to titanium flanges.

There are holes on the titanium flange, and the bolts connect the two flanges tightly. The flanges are sealed with gaskets. Flanged fittings refer to fittings with flanges (flanges or pans).

The flange connection consists of a pair of flanges, a gasket and several bolts and nuts. It can be constructed by threaded connections or by welding. The gasket is placed between the sealing surfaces of the two flanges. After the nut is tightened, the specific pressure on the surface of the gasket will deform when it reaches a certain value, and fill the unevenness on the sealing surface to make the connection tight and leak-proof.

Why choose titanium flange for your piping system? Titanium is an excellent material with a perfect strength-to-weight ratio, good overall formability and workability, it offers the ability to be hot or cold formed while retaining its excellent mechanical properties.

معلومات عامة

Materials: Titanium Grade F-2 (UNS R50400), Grade F-7 (UNS R52400)

Types: blind, threaded, slip-on, reducing, weld neck, socket weld and lap joint.

Dimensions: ANSI /ASME B16.5, B16.47 Series A & B, B16.48, EN-1092, DIN, etc.

مقاس: 1 / 2to 24

Class/ Pressure: 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64, etc.

Flange Face Type: Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)

سطح: Forged Surface, Rolled Surface, Turned Surface, Polished Surface

Conditions: annealed titanium and titanium alloy forgings

Production Method: free forging, die forging, precision forging, welding

Detection Method: ray detection, coloring, flaw detection, water pressure test and other tests can be done according to customer needs.

Different Forms of Titanium Industrial Flanges - Guide to Titanium Flanges

Specifications

ASTM B381/ASME SB381: Standard Specification for Titanium and Titanium Alloy Forgings

Guide To Titanium Flanges-ASME/ANSI B16.5 Flanges and Bolt DimensionsClass 150 to 2500

Class 150 | Class 300 | Class 400 | Class 600 | Class 900 | Class 1500 | Class 2500

  • 1 inch = 25.4 mm
Nominal Pipe Size
NPS
(inches)
Class 150
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/43-3/841/20.622-1/4
1/23-1/241/20.622-3/8
3/43-7/841/20.622-3/4
14-1/441/20.623-1/8
1-1/44-5/841/20.623-1/2
1-1/2541/20.623-7/8
2645/80.754-3/4
2-1/2745/80.755-1/2
37-1/245/80.756
3-1/28-1/285/80.757
4985/80.757-1/2
51083/40.888-1/2
61183/40.889-1/2
813-1/283/40.8811-3/4
1016127/8114-1/4
1219127/8117
14211211.1218-3/4
1623-1/21611.1221-1/4
1825161-1/81.2522-3/4
2027-1/2201-1/81.2525
2432201-1/41.3829-1/2
Guide to Titanium Flanges
Nominal Pipe Size
NPS
(inches)
Class 300
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/43-3/841/20.622-1/4
1/23-3/441/20.622-5/8
3/44-5/845/80.753-1/4
14-7/845/80.753-1/2
1-1/45-1/445/80.753-7/8
1-1/26-1/843/40.884-1/2
26-1/285/80.755
2-1/27-1/283/40.885-7/8
38-1/483/40.886-5/8
3-1/2983/40.887-1/4
41083/40.887-7/8
51183/40.889-1/4
612-1/2123/40.8810-5/8
815127/8113
1017-1/21611.1215-1/4
1220-1/2161-1/81.2517-3/4
1423201-1/81.2520-1/4
1625-1/2201-1/41.3822-1/2
1828241-1/41.3824-3/4
2030-1/2241-1/41.3827
2436241-1/21.6232
Guide to Titanium Flanges
Nominal Pipe Size
NPS
(inches)
Class 400
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/43-3/841/20.622-1/4
1/23-3/441/20.622-5/8
3/44-5/845/80.753-1/4
14-7/845/80.753-1/2
1-1/45-1/445/80.753-7/8
1-1/26-1/843/40.884-1/2
26-1/285/80.755
2-1/27-1/283/40.885-7/8
38-1/483/40.886-5/8
3-1/2987/817-1/4
41087/817-7/8
51187/819-1/4
612-1/2127/8110-5/8
8151211.1213
1017-1/2161-1/81.2515-1/4
1220-1/2161-1/41.3817-3/4
1423201-1/41.3820-1/4
1625-1/2201-3/81.522-1/2
1828241-3/81.524-3/4
2030-1/2241-1/21.6227
2436241-3/41.8832
Guide to Titanium Flanges, Source: tisupplier.com
Nominal Pipe Size
NPS
(inches)
Class 600
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/43-3/841/20.622-1/4
1/23-3/441/20.622-5/8
3/44-5/845/80.753-1/4
14-7/845/80.753-1/2
1-1/45-1/445/80.753-7/8
1-1/26-1/843/40.884-1/2
26-1/285/80.755
2-1/27-1/283/40.885-7/8
38-1/483/40.886-5/8
3-1/2987/817-1/4
410-3/487/818-1/2
513811.1210-1/2
6141211.1211-1/2
816-1/2121-1/81.2513-3/4
1020161-1/41.3817
1222201-1/41.3819-1/4
1423-3/4201-3/81.520-3/4
1627201-1/21.6223-3/4
1829-1/4201-5/81.7525-3/4
2032241-5/81.7528-1/2
2437241-7/8233
Guide to Titanium Flanges
Nominal Pipe Size
NPS
(inches)
Class 900
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/24-3/443/40.883-1/4
3/45-1/843/40.883-1/2
15-7/847/814
1-1/46-1/447/814-3/8
1-1/27411.124-7/8
28-1/287/816-1/2
2-1/29-5/8811.127-1/2
39-1/287/817-1/2
411-1/281-1/81.259-1/4
513-3/481-1/41.3811
615121-1/81.2512-1/2
818-1/2121-3/81.515-1/2
1021-1/2161-3/81.518-1/2
1224201-3/81.521
1425-1/4201-1/21.6222
1627-3/4201-5/81.7524-1/2
1831201-7/8227
2033-3/42022.1229-1/2
2441202-1/22.6235-1/2
Guide to Titanium Flanges
Nominal Pipe Size
NPS
(inches)
Class 1500
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/24-3/443/40.883-1/4
3/45-1/843/40.883-1/2
15-7/847/814
1-1/46-1/447/814-3/8
1-1/27411.124-7/8
28-1/287/816-1/2
2-1/29-5/8811.127-1/2
310-1/281-1/81.258
412-1/481-1/41.389-1/2
514-3/481-1/21.6211-1/2
615-1/2121-3/81.512-1/2
819121-5/81.7515-1/2
1023121-7/8219
1226-1/21622.1222-1/2
1429-1/2162-1/42.3825
1632-1/2162-1/22.6227-3/4
1836162-3/42.8830-1/2
2038-3/41633.1232-3/4
2446163-1/23.6239
Guide to Titanium Flanges
Nominal Pipe Size
NPS
(inches)
Class 2500
Diameter of
Flange
(inches)
No.
of
Bolts
Diameter of
Bolts
(inches)
Diameter of
Bolt Holes
(inches)
Bolt
Circle
(inches)
1/25-1/443/40.883-1/2
3/45-1/243/40.883-3/4
16-1/447/814-1/4
1-1/47-1/4411.125-1/8
1-1/2841-1/81.255-3/4
29-1/4811.126-3/4
2-1/210-1/281-1/81.257-3/4
31281-1/41.389
41481-1/21.6210-3/4
516-1/281-3/41.8812-3/4
619822.1214-1/2
821-3/41222.1217-1/4
1026-1/2122-1/22.6221-1/4
1230122-3/42.8824-3/8
Guide to Titanium Flanges

Pressure(psig)And Temperature Ratings

Corresponding relationship between pressure level and PN

In your list, some pressure levels are measured inClassunits (such as 75, 150, 300, 600, 900, 1500, 2500), while others are measured inPNunits (such as PN 2.5 to PN 400). The correspondence between these two units is not direct, asClassis the nominal pressure rating in American standards (such as ANSI/ASME), whilePNis the pressure rating representation method in European standards (such as DIN/EN). However, in order to roughly understand the correspondence between them, the following conversion relationships can be referred to (note that this is only a rough correspondence, specific reference should be made to relevant standards):

Class 150 ≈ PN 2.0 MPa
Class 300 ≈ PN 5.0 MPa
Class 600 ≈ PN 11.0 MPa
Class 900 ≈ PN 15.0 MPa
Class 1500 ≈ PN 26.0 MPa
Class 2500 ≈ PN 42.0 MPa

For non-standardClass 75” و “PN 400, it should be noted thatClass 75may be a non-standard or application specific pressure rating, whilePN 400far exceeds the common PN rating range and may require special design and manufacturing.

Titanium FlangesPressure Rating Chart
Temperature °F150#300#400#600#900#1500#2500#
-20-1002757209601440216036006000
2002306008001200180030005000
3002055407201080162027004500
400190495660995149024854140
500170465620930139523303880
600140435580875131021853640
650125430575860129021503580
700110425565850127521253540
75095415555830124520753460
80080405540805121020153360
85065395530790119019803300
90050390520780116519453240
95035380510765114519103180
10002032043064096516052675
10502031041061592515452570
11002025534551577012852145
1150202002654005959951655
1200201552053104657701285
125020115150225340565945
13002085115170255430715
1350206080125185310515
140020506595145240400
145015354570105170285
15001025355580135230
Guide to Titanium Flanges

ASTM B381 Titanium Flanges Available Types & الأشكال

ASTM B381 Titanium Blind Flanges
ASTM B381 Titanium Threaded / Screwed Flanges
ASTM B381 Titanium Slip On Flanges
ASTM B381 Titanium Weld Neck Flanges
ASTM B381 Titanium Socket Weld Flanges
ASTM B381 Titanium Plate Flanges
ASTM B381 Titanium Lap Joint Flanges
ASTM B381 Titanium Long Weld Neck Flanges
ASTM B381 Titanium Reducing Flanges
ASTM B381 Titanium Ring Type Joint Flanges
ASTM B381 Titanium Tongue & Groove Flanges

Guide To Titanium FlangesFAQ