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Carbon Steel Reducer

A carbon steel reducer is a pipe fitting used to connect two pipes of different diameters. It facilitates a smooth transition in the flow of fluids between pipes of varying sizes, maintaining optimal pressure and flow characteristics. The reducer is a vital component in a piping system, often utilized in industries such as oil and gas, chemical, water treatment, and construction.

What is a Carbon Steel Reducer?

  • Concentric Reducers: These have a central axis where the diameter of the pipe is reduced symmetrically. The reduction occurs evenly from the center to the outer edges of the pipe. Concentric reducers are commonly used in vertical pipelines.
  • Eccentric Reducers: These reducers are designed with an offset centerline, meaning the smaller diameter pipe is aligned to one side of the larger pipe. This design is often preferred in horizontal piping systems to ensure that the flow of fluid remains uninterrupted and the pipe does not sag.
carbon-steel-concentric-reducer
Carbon Steel Concentric Reducer
carbon-steel-eccentric-reducer
Carbon Steel Eccentric Reducer

Technical Specification

Material Grade– A106 Grade B
– A234 WPB
– A105
Nominal Pipe Size (NPS)– Ranges from NPS 1/2 to NPS 48 (or more)
Outside Diameter (OD)– Varies based on NPS size (e.g., NPS 4 has an OD of 4.5 inches / 114.3 mm)
Wall Thickness– Sch 10, Sch 40, Sch 80, Sch 160, Sch XXS (extra strong)
Pressure Rating– Typically 150 to 2500 psi, dependent on size and material grade
Temperature Range– Commonly rated up to 400°C (752°F), but some special alloys may handle higher temperatures
End Type– Butt Weld
– Socket Weld
– Threaded
– Flanged
Reducer Type– Concentric
– Eccentric
Tolerance– Tolerances typically ±1/8 inch or ±0.2 mm (depends on manufacturer and pipe grade)
Test Requirements– Hydrostatic Test
– Pneumatic Test
– Ultrasonic Test (for material integrity)
Surface Finish– Plain (mill finish)
– Galvanized
– Painted (for corrosion resistance)
Length of Reducer– Standard length varies from 4 to 12 inches (custom lengths available upon request)
Coating Options– Zinc coating, epoxy coating, or painting for corrosion protection
Certifications– ISO 9001 certified, CE marking, API certifications (where applicable)
Material Compatibility– Suitable for use with oil, gas, water, chemicals, steam, and other fluids in industrial applications
Weight– Varies by size and wall thickness (e.g., for NPS 4, weight may be approximately 8-10 kg)

Carbon Steel Concentric and Eccentric Reducer Dimensions Chart (in lbs)

NOMINAL PIPE SIZEOUTSIDE DIAMETEREND TO END
InchDPH
3/4 x 1/226.721.338
3/4 x 3/826.717.138
1 x 3/433.426.751
1 x 1/233.421.351
1 1/4 x 142.233.451
1 1/4 x 3/442.226.751
1 1/4 x 1/242.221.351
1 1/2 x 1 1/248.342.264
1 1/2 x 148.333.464
1 1/2 x 3/448.326.764
1 1/2 x 1/248.321.364
2 x 1 1/260.348.276
2 x 1 1/460.342.276
2 x 160.333.476
2 x 3/460.326.776
2 1/2 x 27360.389
2 1/2 x 1 1/27348.389
2 1/2 x 1 1/47342.289
2 1/2 x 17333.489
3 x 2 1/288.97389
3 x 288.960.389
3 x 1 1/288.948.389
3 x 1 1/488.942.289
3 1/2 x 3101.688.9102
3 1/2 x 21/2101.673102
3 1/2 x 2101.660.3102
3 1/2 x 1 1/2101.648.3102
3 1/2 x 1 1/4101.642.2102
4 x 3 1/2114.3101.6102
4 x 3114.388.9102
4 x 2 1/2114.373102
4 x 2114.360.3102
4 x 1 1/2114.348.3102
5 x 4141.3114.3127
5 x 3 1/2141.3101.6127
5 x 3141.388.9127
5 x 2 1/2141.373127
5 x 2141.360.3127
6 x 5168.3141.3140
6 x 4168.3114.3140
6 x 3 1/2168.3101.6140
6 x 3168.388.9140
6 x 2 1/2168.373140
8 x 6219.1168.3152
8 x 5219.1141.3152
8 x 4219.1114.3152
8 x 3 1/2219.1101.6152
10 x 8273.1219.1178
10 x 6273.1168.1178
10 x 5273.1141.3178
10 x 4273.1114.3178
12 x 10323.9273.1203
12 x 8323.9219.1203
12 x 6323.9168.3203
12 x 5323.9141.3203
14 x 12355.6323.9330
14 x 10355.6273.1330
14 x 8355.6219.1330
14 x 6355.6168.3330
16 x 14406.4355.6356
16 x 12406.4323.9356
16 x 10406.4273.1356
16 x 8406.4219.1356
16 x 6406.4168.3356
18 x 16457406.4381
18 x 14457355.6381
18 x 12457323.9381
18 x 10457273.1381
18 x 8457219.1381
20 x 18508457508
20 x 16508406.4508
20 x 14508355.6508
20 x 12508323.9508
20 x 10508273.1508
20 x 8508219.1508
22 x 20559508508
22 x 18559457508
22 x 16559406.4508
22 x 14559355.6508
22 x 12559323.9508
24 x 10559273.1508
24 x 22610559508
24 x 20610508508
24 x 18610457508
24 x 16610406.4508
24 x 14610355.6508
24 x 12610323.9508
24 x 10610273.1508

Carbon Steel Concentric and Eccentric Reducer Weight Chart

Equal Tee Weight Chart (in lbs)

Nominal Pipe Size (NPS)Schedule 40Schedule 80Schedule 160
1/2″1.01.31.8
3/4″1.41.82.5
1″1.82.43.2
1 1/4″2.33.04.0
1 1/2″3.04.15.5
2″4.26.28.3
2 1/2″6.79.813.0
3″9.414.118.7
4″14.521.628.8
5″19.028.337.7
6″24.036.048.0
8″34.051.068.0
10″47.571.094.0
12″60.090.0120.0
14″75.0112.0150.0
16″94.0141.0188.0
18″114.0171.0228.0
20″134.0201.0268.0
24″170.0255.0340.0
30″255.0382.5510.0
36″335.0502.5670.0
42″420.0630.0840.0
48″510.0765.01020.0

Reducing Tee Weight Chart (in lbs)

Run x BranchSchedule 40 (lbs)Schedule 80 (lbs)Schedule 160 (lbs)
1/2″ x 3/8″0.30.40.6
3/4″ x 1/2″0.60.91.2
1″ x 3/4″0.81.21.6
1 1/4″ x 1″1.01.52.0
1 1/2″ x 1″1.21.82.5
2″ x 1 1/2″1.82.73.6
2 1/2″ x 2″2.53.85.1
3″ x 2″3.55.37.0
3″ x 2 1/2″3.85.77.6
4″ x 3″5.58.311.0
5″ x 4″7.310.914.4
6″ x 4″9.514.218.9
6″ x 5″10.115.120.2
8″ x 6″15.523.331.1
10″ x 8″21.031.542.0
12″ x 10″28.042.056.0
14″ x 12″36.054.072.0
16″ x 12″44.066.088.0
18″ x 16″56.084.0112.0
20″ x 16″68.0102.0136.0
24″ x 20″96.0144.0192.0
24″ x 10″80.0120.0160.0

Material Grade

  • ASTM A234 WPB: This is one of the most widely used grades for carbon steel reducers. It is commonly used for medium to high-temperature services in pressure piping systems.
  • ASTM A106 Grade B: Often used for carbon steel pipe reducers, this grade is for high-temperature service in pressure systems.
  • ASTM A53 Grade B: Another common grade used for carbon steel pipes, including reducers, with applications in various industries.
  • API 5L: For carbon steel pipes used in the oil and gas industry, this grade is common, with specifications for both welded and seamless pipes, including reducers.
  • ASME SA234 WPB: Similar to ASTM A234 WPB, this grade is used for butt weld fittings and is often specified for use in high-pressure and high-temperature systems.

Application

  • Oil and Gas Pipelines
  • Water Treatment Plants
  • Petrochemical
  • Construction
  • Pressure Vessels
  • Phosphate Mining

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