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A420 WPL6 Concentric Reducer

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A420 WPL6 concentric reducer is a kind of reducer, which is in the shape of concentric cone structure. It has two ends, one end has a larger diameter and the other end has a smaller diameter, and the central axis of the large and small ends are coincident, that is, concentric. This structure allows the fluid to maintain a relatively stable flow state while changing the pipe diameter when flowing through the reducer, reducing the eddy current and energy loss caused by the change of pipe diameter.

In the field of petrochemicals, cryogenic steel concentric reducers are often used in the storage, transportation and processing pipeline systems of low-temperature media such as liquefied petroleum gas (LPG) and liquefied natural gas (LNG). Cryogenic steel concentric reducers are also widely used in refrigeration equipment and systems, such as large cold storage and refrigeration unit pipeline connections. When the refrigerant circulates at low temperatures, the concentric reducers can adapt to the changes in pipe diameters in the pipeline system to ensure the normal operation of the refrigeration system.

Specificatin of A420 WPL6 Concentric Reducer

Standard: ASME/ANSI B16.9

Size: 3/4″ to 48″

Thickness: Sch 10, 20, STD, 40, XS, 80, 100, 140,120, 160

Technical: Seamless and Weld

Surface: Black Primer, Hot Dip Galvanized and PE Coated.

Concentric Reducer Dimensions & Sch 40 Weight

OD1	OD2	END TO END	SCH 40 WEIGHT
NPS	NPS	H	KG
3/4	3/8 – 1/2	38	0.07
1	1/2 – 3/4	51	0.14
1 1/4	1/2 – 1	51	0.19
1 1/2	1/2 – 1 1/4	64	0.29
2	3/4 – 1 1/2	76	0.46
2 1/2	1 – 2	89	0.85
3	1 1/4 – 2 1/2	102	1.11
4	2 – 3 1/2	102	1.8
5	2 – 4	127	3.05
6	2 1/2 – 5	140	4.35
8	3 1/2 – 6	152	7.12
10	4 – 8	178	11.8
12	5 – 10	203	17.8
14	6 – 12	330	34.3
16	6 – 14	356	48.3
18	8 – 16	381	65.3
20	10 – 18	508	102
22	12 – 20	508	–
24	12 – 22	508	143
26	12 – 24	610	–
28	14 – 26	610	–
30	14 – 28	610	–
32	20 – 30	610	230
34	22 – 32	610	245
36	22 – 34	610	282
38	24 – 36	610	–
40	28 – 38	610	–
42	28 – 40	610	–
44	32 – 42	610	–
46	34 – 44	711	–
48	36 – 46	711	–
52	40 – 48	711	–
56	40 – 52	711	–
60	44 – 56	711

Installation and Maintenance

When installing the A420 WPL6 concentric reducer, ensure that it is well concentric with the adjacent pipes and fittings. Special fixtures can be used for adjustment to ensure smooth fluid flow. At the same time, during welding installation, the welding process must be strictly followed, such as appropriate preheating before welding (preheating temperature is determined according to the thickness and material of the steel, generally between 100-200℃) to reduce welding stress and prevent defects such as welding cracks in low temperature environments.

Regularly inspect the piping system using low-temperature steel concentric reducers. The inspection content includes whether the appearance of the reducer is corroded, deformed, etc., and whether the welding joint is firm. In a low-temperature environment, even minor corrosion or deformation may affect the performance of the piping system. If problems are found, timely measures should be taken, such as repair or replacement. At the same time, attention should be paid to keeping the environment around the piping system dry to avoid moisture accumulation and corrosion of the low-temperature steel concentric reducer.

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