Product Overview

Eccentric weld reducer is a pipe fitting used to connect two pipes of different diameters, featuring offset centerlines that keep one side of the pipe wall on the same plane. This eccentric design allows for bottom-flat installation, effectively preventing media accumulation at low points in the pipeline, reducing the risk of air pockets, sediment buildup, and localized corrosion. Eccentric reducers are typically connected by butt welding and are widely used in horizontal piping systems for liquid or gas transmission, particularly in applications where continuous media flow must be maintained and the risk of eddy currents or fluid retention must be minimized.

Product Parameters

Parameter	Specification
Execution Standards	ASME B16.9, GOST 17378, DIN2616
Size Range	1/2"–48" (DN15–DN1200)
Wall Thickness Classes	SCH10, SCH20, SCH40, SCH80, SCH160, XXS, GOST, DIN
Connection Type	Butt Welding (BW)
Surface Treatment	Rust preventive oil, anti-corrosion paint, hot-dip galvanizing
Carbon Steel Materials	ct20, A234 WPB, P235GH, P265GH, P355NH, ST35.8, ST37.2
Stainless Steel Materials	304, 304L, 316, 316L, 321, 12Х18Н10Т, 08X18H10, 08X17H13M2T
Alloy Steel Materials	A234 WP11, WP22, WP12, WP5, WP9, WP91, WB36, 15XM, 10Cr9Mo1VNbN
Packaging Method	Wooden crate, wooden pallet
Supply Capacity	1000 tons/month

ASME B16.9-2024
Dimensions of Eccentric Reducers

product-485-318

Nominal Pipe Size (NPS)	Outside Diameter at Bevel (mm)		End-to-End H (mm)	Nominal Pipe Size (NPS)	Outside Diameter at Bevel (mm)		End-to-End H (mm)
Nominal Pipe Size (NPS)	Large End	Small End	End-to-End H (mm)	Nominal Pipe Size (NPS)	Large End	Small End	End-to-End H (mm)
3/4x1/2	26.7	21.3	38.1	8x6	219.1	168.3	152.4
3/4x3/8		17.3		8x5		141.3
1x3/4	33.4	26.7	50.8	8x4		114.3
1x1/2		21.3		8x3-1/2		101.6
1-1/4x1	42.2	33.4	50.8	8x3		88.9
1-1/4x3/4		26.7		8x2-1/2		73.0
1-1/4x1/2		21.3		10x8	273.1	29.1	177.8
1-1/2x1-1/4	48.3	42.2	63.5	10x6		168.3
1-1/2x1		33.4		10x5		141.3
1-1/2x3/4		26.7		10x4		114.3
1-1/2x1/2		21.3		12x10	323.9	273.1	203.2
2x1-1/2	60.3	48.3	76.2	12x8		219.1
2x1-1/4		42.2		12x6		168.3
2x1		33.4		12x5		141.3
2x3/4		26.7		14x12	355.6	323.9	330.2
2-1/2x2	73.0	60.3	88.9	14x10		273.1
2-1/2x1-1/2		48.3		14x8		219.1
2-1/2x1-1/4		42.2		14x6		168.3
2-1/2x1		33.4		16x14	406.4	355.6	355.6
3x2-1/2	88.9	73.0	88.9	16x12		323.9
3x2		60.3		16x10		273.1
3x1-1/2		48.3		16x8		219.1
3x1-1/4		42.2		18x16	457.2	406.4	381.0
3-1/2x3	101.6	88.9	101.6	18x14		355.6
3-1/2x2-1/2		73.0		18x12		323.9
3-1/2x2		60.3		18x10		273.1
3-1/2x1-1/2		48.3		18x8		219.1
3-1/2x1-1/4		42.2		20x18	508.0	457.2	508.0
4x3-1/2	114.3	101.6	101.6	20x16		406.4
4x3		88.9		20x14		355.6
4x2-1/2		73.0		20x12		323.9
4x2		60.3		20x10		273.0
4x1-1/2		48.3		22x20	558.8	508.0	508.0
5x4	141.3	114.3	127.0	22x18		457.2
5x3-1/2		101.6		22x16		406.4
5x3		88.9		22x14		355.6
5x2-1/2		73.0		22x12		323.8
5x2		60.3		24x22	609.6	558.8	508.0
6x5	168.3	141.3	139.7	24x20		508.0
6x4		114.3		24x18		457.2
6x3-1/2		101.6		24x16		406.4
6x3		88.9		24x16		355.6
6x2-1/2		73.0		24x16		323.8

Product Advantages

Optimized Structural Design

The eccentric structure effectively prevents media accumulation, reduces air pockets and corrosion risks, improving pipeline operational efficiency.

Easy Installation and Maintenance

Supports bottom-flat installation for easy sediment removal, reducing maintenance frequency by 40%; allows for wall-mounted installation to optimize space layout.

Main Applications

Mechanical Equipment Manufacturing

Eccentric weld reducer are paired with equipment like compressors, pumps, and reactors for inlet/outlet pipe connections, enhancing system compatibility.

Pharmaceutical and Food Industry

Applied in sanitary pipeline systems for dairy, beverage, beer, and pharmaceutical production, requiring smooth inner walls with no dead corners to prevent residue and bacterial growth.

FAQ

Q1. What is the difference between eccentric weld reducer and a concentric reducer?

A1: The fundamental difference between an eccentric reducer and a concentric reducer lies in their axial design: a concentric reducer has both ends aligned on the same centerline, while an eccentric reducer features an offset between the two ends, creating a structure with one side flat and the other inclined. This design disparity directly dictates their application scenarios: concentric reducers are suitable for vertical pipelines or situations where media flow is not affected by gravity, with their symmetrical structure providing relatively uniform fluid distribution. Eccentric reducers, however, are specifically designed for horizontal pipeline installation, with their core value lying in addressing two major hazards in media transmission-gas accumulation and solid deposition.

Q2. What is the pressure resistance performance of your products?

A2: The pressure resistance of the product primarily depends on the wall thickness grade and material selection, and we strictly adhere to international standards such as ASME B16.9 and GOST 17378 in production. The wall thickness range covers SCH10 to SCH160, XXS, as well as GOST/DIN standard series, accommodating various pipeline system requirements from low pressure to ultra-high pressure. For instance, SCH40S and SCH80S are suitable for conventional pressure scenarios, while SCH160 and XXS are specifically designed for high-temperature, high-pressure, or highly corrosive conditions, ensuring excellent safety and durability under extreme operating environments.

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