GOST 17378 Reducer

Description

Product Description GOST 17378 Reducer

GOST 17378 standard defines the requirements for reducers used in piping systems. These reducers are fittings that allow for a smooth transition between two pipes with different diameters. They are commonly used in industries such as petrochemical, oil and gas, power generation, and water treatment. Reducers conforming to this standard ensure high-quality performance, durability, and efficient flow control in pipelines.

GOST 17378 Reducer Concentric and Eccentric Reducer Dimensions Chart (in lbs)

NOMINAL PIPE SIZE	OUTSIDE DIAMETER		END TO END
Inch	D	P	H
3/4 x 1/2	26.7	21.3	38
3/4 x 3/8	26.7	17.1	38
1 x 3/4	33.4	26.7	51
1 x 1/2	33.4	21.3	51
1 1/4 x 1	42.2	33.4	51
1 1/4 x 3/4	42.2	26.7	51
1 1/4 x 1/2	42.2	21.3	51
1 1/2 x 1 1/2	48.3	42.2	64
1 1/2 x 1	48.3	33.4	64
1 1/2 x 3/4	48.3	26.7	64
1 1/2 x 1/2	48.3	21.3	64
2 x 1 1/2	60.3	48.2	76
2 x 1 1/4	60.3	42.2	76
2 x 1	60.3	33.4	76
2 x 3/4	60.3	26.7	76
2 1/2 x 2	73	60.3	89
2 1/2 x 1 1/2	73	48.3	89
2 1/2 x 1 1/4	73	42.2	89
2 1/2 x 1	73	33.4	89
3 x 2 1/2	88.9	73	89
3 x 2	88.9	60.3	89
3 x 1 1/2	88.9	48.3	89
3 x 1 1/4	88.9	42.2	89
3 1/2 x 3	101.6	88.9	102
3 1/2 x 21/2	101.6	73	102
3 1/2 x 2	101.6	60.3	102
3 1/2 x 1 1/2	101.6	48.3	102
3 1/2 x 1 1/4	101.6	42.2	102
4 x 3 1/2	114.3	101.6	102
4 x 3	114.3	88.9	102
4 x 2 1/2	114.3	73	102
4 x 2	114.3	60.3	102
4 x 1 1/2	114.3	48.3	102
5 x 4	141.3	114.3	127
5 x 3 1/2	141.3	101.6	127
5 x 3	141.3	88.9	127
5 x 2 1/2	141.3	73	127
5 x 2	141.3	60.3	127
6 x 5	168.3	141.3	140
6 x 4	168.3	114.3	140
6 x 3 1/2	168.3	101.6	140
6 x 3	168.3	88.9	140
6 x 2 1/2	168.3	73	140
8 x 6	219.1	168.3	152
8 x 5	219.1	141.3	152
8 x 4	219.1	114.3	152
8 x 3 1/2	219.1	101.6	152
10 x 8	273.1	219.1	178
10 x 6	273.1	168.1	178
10 x 5	273.1	141.3	178
10 x 4	273.1	114.3	178
12 x 10	323.9	273.1	203
12 x 8	323.9	219.1	203
12 x 6	323.9	168.3	203
12 x 5	323.9	141.3	203
14 x 12	355.6	323.9	330
14 x 10	355.6	273.1	330
14 x 8	355.6	219.1	330
14 x 6	355.6	168.3	330
16 x 14	406.4	355.6	356
16 x 12	406.4	323.9	356
16 x 10	406.4	273.1	356
16 x 8	406.4	219.1	356
16 x 6	406.4	168.3	356
18 x 16	457	406.4	381
18 x 14	457	355.6	381
18 x 12	457	323.9	381
18 x 10	457	273.1	381
18 x 8	457	219.1	381
20 x 18	508	457	508
20 x 16	508	406.4	508
20 x 14	508	355.6	508
20 x 12	508	323.9	508
20 x 10	508	273.1	508
20 x 8	508	219.1	508
22 x 20	559	508	508
22 x 18	559	457	508
22 x 16	559	406.4	508
22 x 14	559	355.6	508
22 x 12	559	323.9	508
24 x 10	559	273.1	508
24 x 22	610	559	508
24 x 20	610	508	508
24 x 18	610	457	508
24 x 16	610	406.4	508
24 x 14	610	355.6	508
24 x 12	610	323.9	508
24 x 10	610	273.1	508

GOST 17378 Reducer Concentric and Eccentric Reducer Weight Chart (in lbs)

Run x Branch	Schedule 40 (lbs)	Schedule 80 (lbs)	Schedule 160 (lbs)
3/4" x 1/2"	0.6	0.8	1.0
1" x 3/4"	1.0	1.4	1.8
1 1/4" x 1"	1.4	2.0	2.6
1 1/2" x 1"	1.6	2.4	3.2
2" x 1 1/2"	2.3	3.2	4.3
2 1/2" x 2"	3.0	4.4	5.9
3" x 2"	4.2	6.1	8.2
3" x 2 1/2"	4.4	6.5	8.7
4" x 3"	6.1	9.1	12.2
5" x 4"	8.3	12.5	16.7
6" x 4"	10.3	15.5	20.7
6" x 5"	11.0	16.5	22.0
8" x 6"	16.3	24.5	32.7
10" x 8"	22.0	33.0	44.0
12" x 10"	28.6	43.0	57.3
14" x 12"	37.6	56.4	75.2
16" x 12"	46.6	69.9	93.2
18" x 16"	59.0	88.5	118.0
20" x 16"	71.0	106.5	142.0
24" x 20"	98.0	147.0	196.0
24" x 10"	78.0	117.0	156.0

Material

Reducers made according to GOST 17378 are typically manufactured from carbon steel and are designed to withstand the mechanical and thermal stresses found in various industrial environments. In some cases, alloy steels or stainless steels are used depending on the specific requirements of the application, such as higher resistance to corrosion or extreme temperatures.

Common materials used for GOST 17378 reducer:

• Carbon Steel: Ensures good mechanical strength and resistance to stress.
• Alloy Steel: For enhanced durability, especially under high-temperature or high-pressure conditions.
• Stainless Steel: Offers excellent resistance to corrosion and oxidation, often used for more demanding environments.

Type

There are two primary types of reducers based on their shape and functionality:

1. Concentric Reducers:
   • The centerline of both ends of the reducer is aligned, forming a symmetrical transition. These reducers are used when the fluid flow remains relatively uniform and the pressure drop across the transition is minimal.
2. Eccentric Reducers:
   • The ends of the reducer are offset, which helps to maintain a uniform flow and avoid air pockets, making them ideal for systems where consistent flow or gravity-fed liquids are used.

Corrosion Resistance

The corrosion resistance of GOST 17378 reducers largely depends on the material used in their construction:

• Carbon steel reducers can be susceptible to corrosion if exposed to aggressive environments such as acids or saltwater.
• Stainless steel and alloy steel reducers provide much better resistance to oxidation and corrosion, particularly in environments where the temperature or chemicals could otherwise damage regular steel.

For applications in corrosive environments, the use of stainless steel or coated carbon steel is recommended to ensure longevity and functionality.

Benefits

1. Cost-effective: Made from carbon steel or other readily available materials, GOST 17378 reducers provide an economical solution for piping systems.
2. Durability: The standard ensures that the reducers can handle the physical stresses and pressure variations in pipelines.
3. Efficient Flow Transition: By properly transitioning between different pipe diameters, these reducers help reduce flow turbulence and pressure losses, maintaining system efficiency.
4. Versatility: GOST 17378 reducers are available in various sizes and materials, making them suitable for a wide range of applications.
5. Easy Installation: The standard design ensures that reducers can be installed without the need for complex adjustments or specialized tools.

Applications 

Reducers conforming to GOST 17378 are commonly used in various industries, such as:

1. Oil and Gas: Connecting pipelines with varying diameters to facilitate the flow of oil, gas, and other fluids.
2. Petrochemical Industry: Reducing pipe sizes in chemical processes that require precise control over fluid or gas flow.
3. Water Treatment Plants: Ensuring the transition between pipes of different sizes to facilitate water flow without any disruptions.
4. Power Generation: In power plants where steam, water, and gas flow through pipelines, reducers help to regulate the flow rates and prevent damage to the system.
5. HVAC Systems: In heating, ventilation, and air conditioning systems, reducers help connect pipes of different diameters, optimizing air and fluid flow.