Stainless Steel Buttweld Round Tube Fittings

A Buttweld Round Tube Fitting is permanently joined to Tube via welding, allowing for a strong, leak-proof connection. 

Buttweld Round Tube Fittings are manufactured from ASTM AS 1528 Stainless steel Tube in Austenitic Grades 304 and 316 and Duplex 2205. HiBev AS 1528 specification is also available. 

  • Stirlings stocks a range of Buttweld Round Tube Fittings, including 90 Degree Bend, 45 Degree Bend, Equal Tee, 180 Degree Bend, Y-Piece, Tube Cross, 45 Degree Tee and Tube Cap; as well as Reducing Buttweld Round Tube Fittings, including Reducing Tee, Concentric Reducer and Eccentric Reducer Fittings.  Tube bends have a standard centre line radius 1.5 times the diameter.

  • In addition, Face Rings, manufactured from Sheet in Flat Face and Angle Neck varieties. 

  • Buttweld Round Tube Fittings are available in Wall Thicknesses 1.5mm, 1.6mm and 2.0mm in sizes from O.D 12.70mm to 254.0mm.  

  • Reducing Buttweld Round Tube Fittings are available in Wall Thicknesses 1.5mm and 1.6mm in sizes from O.D 19.05mm x 12.70mm to O.D 304.0mm to 203.2mm. 

  • Face Rings are available in sizes O.D 38.1mm to 305.0mm. 

  • Buttweld Round Tube Fittings are available unpolished and polished. 

  • Other sizes and Grades are available upon request via indent. 

     

    ● Stocked Item ○ Market Available

    Anything not currently in stock/Market Available can be obtained via indent.

 

W.T. O.D. 90º Bend
mm mm 304
Mill
304 
AS1528
304 
A554
316 316 
AS1528
316 
A554
2205 Wgt
    FT9304 FT9P304 FT9P304 FT9316 FT9P316 FT9P316 FT92205  
1.5 88.90 ○  ○  ○  ○  ○  0.53
1.6 12.70 ○  ○  ○  0.01
  15.88 0.01
  19.05 ○  0.02
  25.40 0.04
  31.75 ●  ○  0.06
  38.10 0.08
  44.45 0.10
  50.80 0.15
  63.50 ○  0.23
  76.20 0.34
  88.90 0.54
  101.6 ○  0.60
  127.0 ●  ○  0.95
  152.4 ●  ○  1.36
  203.0 ○  ○  2.42
  254.0 ○  ○  3.50
2.0 25.4 ○  ○  0.04
  31.75 ○  ○  0.07
  38.1 ○  ○  0.10
  50.80 ○  ○  0.18
  63.50 ○  0.29
  76.20 ○  0.42
  101.60 ○  0.75
  127.00 ○  ○  1.17
  152.4 ○  1.70
  203.2 ○  ○  3.02
  254.0 4.50

 

W.T. O.D. 45º Bend 180º Bend
mm mm 304 304
AS1528
304
A554
316 
AS1528
316
A554
2205 Wgt 316 AS1528 Wgt
    FT4304 FT4P304 FT4P304 FT4P316   FT42205   FT18P316  
1.5 88.90 0.42 -
1.6 12.70 ○  ●  ○  0.01 0.01
  15.88 0.01 0.02
  19.05 ○  0.02 0.03
  25.40 ○  0.03 0.05
  31.75 ●  ○  0.05 0.08
  38.10 ●  0.07 0.11
  44.50 0.10 0.18
  50.80 ●  0.12 0.20
  63.50 ○  0.18 0.31
  76.20 ○  0.27 0.45
  88.90 0.43 -
  101.6 ○  0.48 0.80
  127.0 ○  0.75 1.26
  152.4 ○  ○  1.09 1.81
  203.0 ○  ○  ○  1.94 3.23
  254.0 ○  ○  ○  2.90 4.70
2.0 25.4 ○  0.04 0.06
  31.75 ○  0.06 0.09
  38.1 ○  0.08 0.13
  50.80 ○  0.15 0.24
  63.50 ○  0.23 0.38
  76.20 ○  0.33 0.56
  101.60 ○  0.60 1.00
  127.00 ○  0.94 1.57
  152.4 ●  ○  1.36 2.26
  203.2 ○  2.42 4.03
  254.0 4.50 -

 

W.T. O.D. Equal Tee
mm mm 304 316 316 HiBev 2205 Wgt
    FTT304 FTT316 FTT316+P FTT2205  
1.6 12.70 0.05
  15.88 0.07
  19.05 0.08
  25.40 0.13
  31.75 0.20
  38.10 0.30
  44.50 0.45
  50.80 0.50
  63.50 0.80
  76.20 1.10
  101.6 1.60
  127.0 ○  1.80
  152.4 2.80
  203.0 ○  3.50
  254.0 ○  4.30
2.0 25.4 0.15
  31.75 0.25
  38.1 0.38
  50.80 0.65
  63.50 1.10
  76.20 1.50
  101.60 2.30
  127.00 3.80
  152.4 5.40
  203.2 8.40

 

W.T. O.D. Y-Piece Tube Cross 45D Tee Tube Cap
mm mm 316 316 316 316
    FTY316 FTC316 FTT4316 -
1.6 12.70 ○ 
  19.05 ○ 
  25.40
  31.75
  38.10
  50.80
  63.50
  76.20
  101.6
  127.0
  152.4
  203.0 ○ 
  254.0 ○ 
2.0 25.4 ○  ○  ○ 
  31.75 ○  ○  ○ 
  38.1 ○  ○ 
  50.80 ○  ○  ○ 
  63.50 ○  ○  ○ 
  76.20 ○  ○  ○ 
  101.60 ○  ○  ○ 
  127.00 ○  ○  ○ 
  152.4 ○  ○  ○ 
  203.2 ○  ○  ○ 

 

Reducer

Manufactured with square cut ends to suit stainless steel tube diameters HiBev (AS 1528) specification available.

Size Tee Weight Concentric Eccentric Weight
(mm) Reducing (kg) Reducer Reducer (kg)
    FTRT316   FTRC316 FTRE316   
W.T. Diameters 316 HiBev   316 HiBev 316  
1.6 19.05 x 12.70 0.08 0.02
  25.40 x 12.70 0.13 0.04
  25.40 x 19.05 0.13 0.04
  31.75 x 25.40 0.20 0.05
  38.10 x 12.70 0.30 0.05
  38.10 x 19.05 0.30 0.05
  38.10 x 25.40 0.30 0.05
  38.10 x 31.75 0.30 0.05
  50.80 x 19.05 0.50 0.10
  50.80 x 25.40 0.50 0.10
  50.80 x 31.75 0.50 0.10
  50.80 x 38.10 0.50 0.10
  63.50 x 25.40 0.80 0.10
  63.50 x 31.75 0.80 0.10
  63.50 x 38.10 0.80 0.10
  63.50 x 50.80 0.80 0.10
  76.20 x 25.40 1.10 0.25
  76.20 x 38.10 1.10 0.25
  76.20 x 50.80 1.10 0.25
  76.20 x 63.50 1.10 0.25
  101.60 x 25.40 1.60 0.30
  101.60 x 38.10 1.60 0.30
  101.60 x 50.80 1.60 0.30
  101.60 x 63.50 1.60 0.30
  101.60 x 76.20 1.60 0.30
  101.60 x 88.90 1.60 0.30
  127.00 x 76.20 1.80 0.60
  127.00 x 101.60 1.80 0.60
  152.40 x 25.40 2.80 0.70
  152.40 x 50.80 2.80 0.70
  152.40 x 63.50 2.80 0.70
  152.40 x 76.20 2.80 0.70
  152.40 x 101.60 2.80 0.70
  152.40 x 127.00 2.80 0.70
  203.20 x 101.60 3.50 1.60
  203.20 x 152.40 3.50 1.60
2.0 63.50 x 50.80 - 0.13
  76.10 x 50.80 - 0.18
  76.10 x 63.50 - 0.18
  152.40 x 76.2 - ○  0.80
  203.20 x 50.8 - 4.2
  203.20 x 101.60 - 5.2
  203.20 x 152.40 - 5.2
  254.00 x 152.40 - -
  304.00 x 203.20 - -

 

Rings

Face rings are flat faced and manufactured from sheet. Angle necks are manufactured from angle to suit tube diameters.

Outside Diameter Type Material Grade 316
mm      
38.1 Flat face 3mm thick
50.8 Flat face 3mm thick
63.5 Flat face 3mm thick
76.2 Angle Neck 20 x 20 x 3
101.6 Angle Neck 20 x 20 x 3
152.4 Angle Neck 25 x 25 x 3
203.0 Angle Neck 25 x 25 x 3
254.0 Angle Neck 30 x 30 x 4
305.0 Angle Neck 30 x 30 x 4