MetraPak

Packed Expansion Joint

Combat high pressure and temperature with the Metrapak.

The MetraPak’s unique design is capable of absorbing large amounts of axial movement (up to 24” for single joints and 48” for dual joints) in pipelines and process systems, reducing the number of joints and anchors.

  1. Packing Cylinders – The  packing cylinders are made of carbon steel, welded in place and are designed for injecting packing under full line pressure.
  2. Integral Internal and External Guides – Guides are made of nonferrous material to ensure close tolerance guiding without scratching or scoring of the slip.
  3. Slip – Made of carbon steel, the slip is accurately machines and plated with chrome over nickel (standard) or with double hard chrome plating (optional).
  4. Drain – Furnished when specified.
  5. Limit stops – Prevents the slip from being pulled out of the body. Limit stops are made of stainless steel and designed for 150% of pressure thrust.
  6. Shut-off Valve – Quarter-turn shut-off valve installed in the packing cylinder prevents blow back to allow packing of the Metra Pak under full line pressure.


Single MetraPak Flanged Ends 150 lbs

Size A-Movement
4″
A-Movement
8″
A-Movement
12″
B C D
1 1/4 18 7/8 26 7/8 34 7/8 3 5/8 5 3/16 8 1/16
1 1/2 19 27 35 3 3/4 5 1/4 8 1/8
2 19 1/4 27 1/4 35 1/4 4 1/8 5 9/16 8 7/16
2 1/2 19 1/4 27 1/2 35 1/2 4 1/2 5 7/8 8 3/4
3 21 7/8 29 7/8 37 7/8 4 7/8 6 1/4 9 1/8
3 1/2 22 30 38 5 1/4 6 1/2 9 3/8
4 22 1/8 30 1/8 38 1/8 5 1/2 6 3/4 9 5/8
5 22 5/8 30 5/8 38 5/8 6 1/4 7 3/8 10 1/4
6 23 31 39 7 7 7/8 10 3/4
8 23 3/8 31 3/8 39 3/8 8 3/8 8 3/4 11 5/8
10 23 3/4 31 3/8 39 3/8 8 3/8 8 3/4 11 5/8
12 24 1/2 32 1/2 40 1/2 11 11 13 4/5
14 27 1/4 35 1/4 43 1/4 11 1/2 11 3/4 14 5/8
16 27 7/8 35 7/8 43 7/8 12 3/4 12 3/4 15 5/8
18 28 3/8 36 3/8 44 3/8 13 1/2 13 3/4 16 5/8
20 28 3/4 36 3/4 44 3/4 14 3/4 14 3/4 17 5/8
24 29 1/2 37 1/2 45 1/2 17 16 3/4 19 5/8

Single MetraPak Flanged Ends 300 lbs

Size A-Movement
4″
A-Movement
8″
A-Movement
12″
B C D
1 1/4 19 3/8 27 3/8 35 3/8 3 5/8 6 11/16 9 1/2
1 1/2 19 5/8 27 5/8 35 5/8 3 3/4 6 3/4 9 9/16
2 19 3/4 27 3/4 35 3/4 4 1/8 7 1/16 9 7/8
2 1/2 20 1/8 28 1/8 36 1/8 5 7 3/8 10 3/16
3 22 3/4 30 3/4 38 3/4 4 7/8 7 3/4 10 9/16
3 1/2 22 7/8 30 7/8 38 7/8 5 1/4 8 10 3/16
4 23 1/4 31 1/4 39 1/4 5 1/2 8 1/4 11 1/16
5 23 3/4 31 3/4 39 3/4 6 1/4 8 7/8 11 11/16
6 24 32 40 7 9 3/8 12 3/16
8 24 3/4 32 3/4 40 3/4 8 3/8 10 1/4 13 1/16
10 25 1/8 33 1/8 41 1/8 9 3/4 11 3/8 14 3/16
12 25 7/8 33 7/8 41 7/8 11 12 7/16 15 1/4
14 28 3/4 36 3/4 44 3/4 12 1/2 13 1/4 16 1/16
16 29 3/8 37 3/8 45 3/8 13 1/2 14 1/4 17 1/16
18 30 38 46 15 15 1/4 18 1/16
20 30 1/2 38 1/2 46 1/2 16 1/4 16 1/4 19 1/16
24 31 3/8 39 3/8 47 3/8 19 18 1/4 21 1/16


Single MetraPak – Weld Ends 150 lbs

Size A-Movement
4″
A-Movement
8″
A-Movement
12″
B C D
1 1/4 23 3/8 31 3/8 39 3/8 3 5/8 5 3/16 8 1/16
1 1/2 23 7/8 31 7/8 39 7/8 3 3/4 5 1/4 8 1/8
2 23 7/8 31 7/8 39 7/8 4 1/8 5 9/16 8 7/16
2 1/2 24 3/8 32 3/8 40 3/8 4 1/2 5 7/8 8 3/4
3 21 7/8 29 7/8 37 7/8 4 7/8 6 1/4 9 1/8
3 1/2 22 30 38 5 1/4 6 1/2 9 3/8
4 22 1/8 30 1/8 38 1/8 5 1/2 6 3/4 9 5/8
5 22 5/8 30 5/8 38 5/8 6 1/4 7 3/8 10 1/4
6 23 31 39 7 7 7/8 10 3/4
8 23 3/8 31 3/8 39 3/8 8 3/8 8 3/4 11 5/8
10 23 3/4 31 3/8 39 3/8 8 3/8 8 3/4 11 5/8
12 24 1/2 32 1/2 40 1/2 11 11 13 4/5
14 27 1/4 35 1/4 43 1/4 11 1/2 11 3/4 14 5/8
16 27 7/8 35 7/8 43 7/8 12 3/4 12 3/4 15 5/8
18 28 3/8 36 3/8 44 3/8 13 1/2 13 3/4 16 5/8
20 28 3/4 36 3/4 44 3/4 14 3/4 14 3/4 17 5/8
24 29 1/2 37 1/2 45 1/2 17 16 3/4 19 5/8

Single MetraPak – Weld Ends 300 lbs

Size A-Movement
4″
A-Movement
8″
A-Movement
12″
B C D
1 1/4 23 3/8 31 3/8 39 3/8 3 5/8 6 11/16 9 1/2
1 1/2 23 7/8 31 7/8 39 7/8 3 3/4 6 3/4 9 9/16
2 23 7/8 31 7/8 39 7/8 4 1/8 7 1/16 9 7/8
2 1/2 24 3/8 32 3/8 40 3/8 4 1/2 7 3/8 10 3/16
3 26 5/8 34 5/8 42 5/8 4 7/8 7 3/4 10 9/16
3 1/2 27 5/8 35 5/8 43 5/8 5 1/4 8 10 13/16
4 27 3/4 35 3/4 43 3/4 5 1/2 8 1/4 11 1/16
5 28 1/2 36 1/2 44 1/2 6 1/4 8 7/8 11 11/16
6 27 1/8 35 1/8 43 1/8 7 9 3/8 12 3/16
8 27 1/8 35 1/8 43 1/8 8 3/8 10 1/4 13 1/16
10 27 1/8 35 1/8 43 1/8 9 3/4 11 3/8 14 3/16
12 27 3/8 35 3/8 43 3/8 11 12 7/16 15 1/4
14 30 38 46 12 1/2 13 1/4 16 1/16
16 30 1/8 38 1/8 46 1/8 13 1/2 14 1/4 17 1/16
18 30 1/4 38 1/4 46 1/4 15 15 1/4 18 1/16
20 30 1/4 38 1/4 46 1/4 16 1/4 16 1/4 19 1/16
24 30 1/4 38 1/4 46 1/4 19 18 1/4 21 1/16


Double MetraPak – Flanged Ends 150 lbs

Size A-Movement
4″
A-Movement
8″
A-Movement
12″
B C D
1 1/4 34 7/8 50 7/8 66 7/8 3 5/8 5 3/16 8 1/16
1 1/2 35 51 67 3 3/4 5 1/4 8 1/8
2 35 3/8 51 3/8 67 3/8 4 1/8 5 9/16 8 7/16
2 1/2 35 5/8 51 5/8 67 5/8 4 1/2 5 7/8 8 3/4
3 40 1/4 56 1/4 72 1/4 4 7/8 6 1/4 9 1/8
3 1/2 40 1/4 56 1/4 72 1/4 5 1/4 6 1/2 9 3/8
4 40 1/4 56 1/4 72 1/4 5 1/2 6 3/4 9 5/8
5 41 1/8 57 1/8 73 1/8 6 1/4 7 3/8 10 1/4
6 41 3/8 57 3/8 73 3/8 7 7 7/8 10 3/4
8 41 3/4 57 3/4 73 3/4 8 3/8 8 3/4 11 5/8
10 42 1/8 58 1/8 74 1/8 9 3/4 9 7/8 12 3/4
12 43 1/4 59 1/4 75 1/4 11 10 15/16 13 13/16
14 48 1/8 64 1/8 80 1/8 11 1/2 11 3/4 14 5/8
16 49 1/4 65 1/4 81 1/4 12 3/4 12 3/4 15 5/8
18 49 5/8 65 5/8 81 5/8 13 1/2 13 3/4 15 5/8
20 50 66 82 14 3/4 14 3/4 17 5/8
24 50 3/4 66 3/4 82 3/4 17 16 3/4 19 5/8

Double MetraPak – Flanged Ends 300 lbs

Size A-Movement
4″
A-Movement
8″
A-Movement
12″
B C D
1 1/4 35 3/8 51 3/8 67 3/8 3 5/8 6 11/16 9 1/2
1 1/2 35 3/4 51 3/4 67 3/4 3 3/4 6 3/4 9 9/16
2 35 3/4 51 3/4 67 3/4 4 1/8 7 1/16 9 7/8
2 1/2 36 1/8 52 1/8 68 1/8 4 1/2 7 3/8 10 3/16
3 41 57 73 4 7/8 7 3/4 10 9/16
3 1/2 41 1/8 57 1/8 73 1/8 5 1/4 8 10 13/16
4 41 3/8 57 3/8 73 3/8 5 1/2 8 1/4 11 1/16
5 42 1/4 58 1/4 74 1/4 6 1/4 8 7/8 11 11/16
6 42 3/8 58 3/8 74 3/8 7 9 3/8 12 3/16
8 43 1/8 59 1/8 75 1/8 8 3/8 10 1/4 13 1/16
10 43 1/2 59 1/2 75 1/2 9 3/4 11 3/8 14 3/16
12 44 5/8 60 5/8 76 5/8 11 12 7/16 15 1/4
14 49 5/8 65 5/8 81 5/8 12 1/2 13 1/4 16 1/16
16 50 3/4 66 3/4 82 3/4 13 1/2 14 1/4 17 1/16
18 51 1/4 67 1/4 83 1/4 15 15 1/4 18 1/16
20 51 3/4 67 3/4 83 3/4 16 1/4 16 1/4 19 1/16
24 52 5/8 68 5/8 84 5/8 19 18 1/4 21 1/16


Double MetraPak – Weld Ends 150 lbs

Size A-Traverse
4″
A-Traverse
8″
A-Traverse
12″
B C D
1 1/4 39 5/8 55 5/8 71 5/8 3 5/8 5 3/16 8 1/16
1 1/2 39 5/8 55 5/8 71 5/8 3 3/4 5 1/4 8 1/8
2 39 5/8 55 5/8 71 5/8 4 1/8 5 9/16 8 7/16
2 1/2 39 5/8 55 5/8 71 5/8 4 1/2 5 7/8 8 3/4
3 44 1/8 60 1/8 76 1/8 4 7/8 6 1/4 9 1/8
3 1/2 44 1/8 60 1/8 76 1/8 5 1/4 6 1/2 9 3/8
4 44 1/8 60 1/8 76 1/8 5 1/2 6 3/4 9 5/8
5 44 3/4 60 3/4 76 3/4 6 1/4 7 3/8 10 3/4
6 44 3/4 60 3/4 76 3/4 7 7 7/8 10 3/4
8 44 3/4 60 3/4 76 3/4 8 3/8 8 3/4 11 5/8
10 44 3/4 60 3/4 76 3/4 9 3/4 9 7/8 12 3/4
12 45 3/8 61 3/8 77 3/8 11 10 15/16 13 13/16
14 50 1/8 66 1/8 82 1/8 11 1/2 11 3/4 14 5/8
16 50 3/4 66 3/4 82 3/4 12 3/4 12 3/4 15 5/8
18 50 3/4 66 3/4 82 3/4 13 1/2 13 3/4 16 5/8
20 50 3/4 66 3/4 82 3/4 14 3/4 14 3/4 17 5/8
24 50 3/4 66 3/4 82 3/4 17 16 3/4 19 5/8

Double MetraPak – Weld Ends 300 lbs

Size A-Traverse
4″
A-Traverse
8″
A-Traverse
12″
B C D
1 1/4 39 5/8 55 5/8 71 5/8 3 5/8 6 11/16 9 1/2
1 1/2 39 5/8 55 5/8 71 5/8 3 3/4 6 3/4 9 9/16
2 39 5/8 55 5/8 71 5/8 4 1/8 7 1/16 9 7/8
2 1/2 39 5/8 55 5/8 71 5/8 4 1/2 7 3/8 10 3/16
3 44 1/8 60 1/8 76 1/8 4 7/8 6 1/4 9 1/8
3 1/2 44 1/8 60 1/8 76 1/8 5 1/4 6 1/2 9 3/8
4 44 1/8 60 1/8 76 1/8 5 1/2 8 1/4 11 1/6
5 44 3/4 60 3/4 76 3/4 6 1/4 8 7/8 11 11/16
6 44 3/4 60 3/4 76 3/4 7 9 3/8 12 3/16
8 44 3/4 60 3/4 76 3/4 8 3/8 10 1/4 13 1/16
10 44 3/4 60 3/4 76 3/4 9 3/4 11 3/8 14 3/16
12 45 3/8 61 3/8 77 3/8 11 12 7/16 15 1/4
14 50 1/8 66 1/8 82 1/8 12 1/2 13 1/4 16 1/16
16 50 3/4 66 3/4 82 3/4 13 1/2 14 1/4 17 1/16
18 50 3/4 66 3/4 82 3/4 15 15 1/4 18 1/16
20 50 3/4 66 3/4 82 3/4 16 1/4 16 1/4 19 1/16
24 50 3/4 66 3/4 82 3/4 19 18 1/4 21 1/16