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What does “ASTM A234 WPB Concentric Reducer “Stand for
ASTM A234 WPB concentric reducer is a kind of pipe connecting fittings used to connect two pipe ends in different size, and the connection type of the ends should be in butt weld type. Basing on whether the center axis is in the same horizontal line line or not, it can be divided into concentric and eccentric two different types.
ASTM A234 is the standard specification of butt weld fitting materials include alloys steel and carbon steel, WPB is the the most commonly used carbon steel grade in the system. The standard covers general requirement of killed steel, forgings, bars, plates, seamless or fusion-welded tubular products with filler metal added.
Material of A234 WPB
Material standard of each kind of material standard includes the requirement for chemicals, mechanicals, heat treatment, surface treatment and so on.
Chemical composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Cr | Mo | Ni | Cu | V |
| ASTM A234 WPB | MIN | 0.29 | 0.10 | ||||||||
| MAX | 0.30 | 1.06 | 0.050 | 0.058 | 0.40 | 0.15 | 0.40 | 0.40 | 0.08 |
Mechanical Properties
| MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | R/A % |
| ASTM A234 WPB | 415 min | 240 min | 22 min | 30 min |
Weight List of Concentric Reducer
Please notice the two ends of the reducer may have different thickness schedule, when you judge the weight to calculate the cost for sea or land freight, please be sure you choose the larger schedule number to avoid insufficient budget.
Large End | Sch20 | Sch30 | STD | Sch40 | Sch60 | XS | Sch80 | Sch100 | Sch120 | Sch160 | XXS | |
Norminal Size | ||||||||||||
D N | NPS | |||||||||||
20 | 3/4 |
| 0.06 | 0.07 | 0.07 |
| 0.09 | 0.09 |
|
| 0.12 | 0.15 |
25 | 1 |
| 0.12 | 0.14 | 0.14 |
| 0.18 | 0.18 |
|
| 0.24 | 0.31 |
32 | 1-1/4 |
| 0.16 | 0.19 | 0.19 |
| 0.25 | 0.25 |
|
| 0.32 | 0.45 |
40 | 1-1/2 |
| 0.25 | 0.29 | 0.29 |
| 0.38 | 0.38 |
|
| 0.51 | 0.7 |
50 | 2 |
| 0.37 | 0.46 | 0.46 |
| 0.63 | 0.63 |
|
| 0.93 | 1.2 |
62 | 2-1/2 |
| 0.79 | 0.85 | 0.85 |
| 1.12 | 1.12 |
|
| 1.46 | 2 |
80 | 3 |
| 0.97 | 1.11 | 1.11 |
| 1.5 | 1.5 |
| - | 2.09 | 2.71 |
90 | 3-1/2 |
| 1.28 | 1.52 | 1.52 |
| 2.09 | 2.09 |
| - | - | - |
100 | 4 |
| 1.45 | 1.81 | 1.81 |
| 2.51 | 2.5 |
| 3.18 | 3.76 | 4.6 |
125 | 5 | - | - | 3.04 | 3.04 | - | 4.33 | 4.33 | - | 5.63 | 6.86 | 8.02 |
250 | 10 | 8.18 | 9.99 | 11.8 | 11.8 | 16 | 16 | 18.8 | 22.5 | 26 | 33.7 | 30.4 |
300 | 12 | 11.1 | 14.6 | 16.5 | 17.8 | 24.3 | 21.8 | 29.5 | 35.7 | 41.7 | 53.3 | 41.7 |
350 | 14 | 24.6 | 29.5 | 29.6 | 34.3 | 46 | 39 | 57.4 | 70.8 | 81.5 | 102 | - |
400 | 16 | 30.5 | 36.5 | 36.6 | 48.3 | 62.7 | 48.3 | 79.7 | 96.2 | 112 | 143 |
|
450 | 18 | 36.8 | 51.3 | 44.1 | 65.3 | 86.2 | 58.3 | 107 | 130 | 152 | 193 |
|
500 | 20 | 65.5 | 86.7 | 65.5 | 102 | 138 | 86.7 | 174 | 213 | 152 | 193 |
|
550 | 22 | 72.2 | 95.6 | 72.2 | - | 164 | 95.6 | 209 | 252 | 294 | 376 |
|
600 | 24 | 78.9 | 117 | 78.9 | 143 | 199 | 105 | 247 | 306 | 358 | 452 |
|
Difference Between Concentric Reducer and Eccentric Reducer
Concentric Reducer
Eccentric Reducer
Different from eccentric reducer, a concentric reducer keep their center line in the same center line. ASTM A234 WPB concentric reducers, they decrease the outer diameter of the pipe ends at a stable ate over one certain length, to reduce the pipe size and keep the pipes system symmetrical at the same time. Eccentric reducers are usually used on the flat surface on the ground because it is more easy to place the pipes on the track.
What does “ASTM A234 WPB Concentric Reducer “Stand for
ASTM A234 WPB concentric reducer is a kind of pipe connecting fittings used to connect two pipe ends in different size, and the connection type of the ends should be in butt weld type. Basing on whether the center axis is in the same horizontal line line or not, it can be divided into concentric and eccentric two different types.
ASTM A234 is the standard specification of butt weld fitting materials include alloys steel and carbon steel, WPB is the the most commonly used carbon steel grade in the system. The standard covers general requirement of killed steel, forgings, bars, plates, seamless or fusion-welded tubular products with filler metal added.
Material of A234 WPB
Material standard of each kind of material standard includes the requirement for chemicals, mechanicals, heat treatment, surface treatment and so on.
Chemical composition
| CHEMICAL | LIMITS | C | Mn | P | S | Si | Cr | Mo | Ni | Cu | V |
| ASTM A234 WPB | MIN | 0.29 | 0.10 | ||||||||
| MAX | 0.30 | 1.06 | 0.050 | 0.058 | 0.40 | 0.15 | 0.40 | 0.40 | 0.08 |
Mechanical Properties
| MATERIAL | T.S (MPA) | Y.S (MPA) | EL % | R/A % |
| ASTM A234 WPB | 415 min | 240 min | 22 min | 30 min |
Weight List of Concentric Reducer
Please notice the two ends of the reducer may have different thickness schedule, when you judge the weight to calculate the cost for sea or land freight, please be sure you choose the larger schedule number to avoid insufficient budget.
Large End | Sch20 | Sch30 | STD | Sch40 | Sch60 | XS | Sch80 | Sch100 | Sch120 | Sch160 | XXS | |
Norminal Size | ||||||||||||
D N | NPS | |||||||||||
20 | 3/4 |
| 0.06 | 0.07 | 0.07 |
| 0.09 | 0.09 |
|
| 0.12 | 0.15 |
25 | 1 |
| 0.12 | 0.14 | 0.14 |
| 0.18 | 0.18 |
|
| 0.24 | 0.31 |
32 | 1-1/4 |
| 0.16 | 0.19 | 0.19 |
| 0.25 | 0.25 |
|
| 0.32 | 0.45 |
40 | 1-1/2 |
| 0.25 | 0.29 | 0.29 |
| 0.38 | 0.38 |
|
| 0.51 | 0.7 |
50 | 2 |
| 0.37 | 0.46 | 0.46 |
| 0.63 | 0.63 |
|
| 0.93 | 1.2 |
62 | 2-1/2 |
| 0.79 | 0.85 | 0.85 |
| 1.12 | 1.12 |
|
| 1.46 | 2 |
80 | 3 |
| 0.97 | 1.11 | 1.11 |
| 1.5 | 1.5 |
| - | 2.09 | 2.71 |
90 | 3-1/2 |
| 1.28 | 1.52 | 1.52 |
| 2.09 | 2.09 |
| - | - | - |
100 | 4 |
| 1.45 | 1.81 | 1.81 |
| 2.51 | 2.5 |
| 3.18 | 3.76 | 4.6 |
125 | 5 | - | - | 3.04 | 3.04 | - | 4.33 | 4.33 | - | 5.63 | 6.86 | 8.02 |
250 | 10 | 8.18 | 9.99 | 11.8 | 11.8 | 16 | 16 | 18.8 | 22.5 | 26 | 33.7 | 30.4 |
300 | 12 | 11.1 | 14.6 | 16.5 | 17.8 | 24.3 | 21.8 | 29.5 | 35.7 | 41.7 | 53.3 | 41.7 |
350 | 14 | 24.6 | 29.5 | 29.6 | 34.3 | 46 | 39 | 57.4 | 70.8 | 81.5 | 102 | - |
400 | 16 | 30.5 | 36.5 | 36.6 | 48.3 | 62.7 | 48.3 | 79.7 | 96.2 | 112 | 143 |
|
450 | 18 | 36.8 | 51.3 | 44.1 | 65.3 | 86.2 | 58.3 | 107 | 130 | 152 | 193 |
|
500 | 20 | 65.5 | 86.7 | 65.5 | 102 | 138 | 86.7 | 174 | 213 | 152 | 193 |
|
550 | 22 | 72.2 | 95.6 | 72.2 | - | 164 | 95.6 | 209 | 252 | 294 | 376 |
|
600 | 24 | 78.9 | 117 | 78.9 | 143 | 199 | 105 | 247 | 306 | 358 | 452 |
|
Difference Between Concentric Reducer and Eccentric Reducer
Concentric Reducer
Eccentric Reducer
Different from eccentric reducer, a concentric reducer keep their center line in the same center line. ASTM A234 WPB concentric reducers, they decrease the outer diameter of the pipe ends at a stable ate over one certain length, to reduce the pipe size and keep the pipes system symmetrical at the same time. Eccentric reducers are usually used on the flat surface on the ground because it is more easy to place the pipes on the track.
