Elliptical Manway / Handhole Reinforcing Rings are available either as seamless or ASME code welded. We will manufacture rings in standard or custom sizes based on your requirements.  Rings can be made up to 12” thick by 20” length for boilers, pressure vessels and steam drums HRSG
Each ring is formed, hot sized, and one edge faced for superior gasket sealing. Our elliptical rings are furnished to SA106-Gr.C / SA105N / SA675gr70 / SA240 Stainless Steel.

Required elliptical ring depths for different sized vessels and manways.

Ring Size		4 X 6	6 X 8	11 X 15	12 X 16	12 X 16 14 X 18	18 X 24
Ring Thickness		1/2	3/4	3/4	3/4	1	1
Vessel		Required Depth of Ring "L"
Diameter (in.)	Wall (in.)
20	3/16	2	3	6
	1/4 - 3/8	3	3
	7/16	3	3
	1/2	3	4
24	To 5/16	2	3	6	6
	3/8 - 7/16	3	3	6	6
	1/2 - 9/16
28	To 3/8	2	3	6	6	6
	7/16	3	3	6	6
	1/2	3	3	6	6
	5/8	3	4	6	6
30	To 1/4	2	2	4	6	6
	5/16 - 3/8	2	3	4	6	6
	7/16	3	3	4	6	6
	1/2	3	3	4	6	6
	5/8 - 3/4	4	4	6	6
36	To 5/16	2	2	4	4	6
	3/8	3	3	4	4	6
	7/16	3	3	4	6	6
	1/2	3	3	4	6	6
	5/8	3	3	6	6	6
	3/4	3	4	6	6	6
42	To 7/16			4		6
	1/2			4		6
	9/16 - 11/16			6		6
	3/4			6		6
48	To 7/16			4		4	6
	1/2			4		6	6
	9/16			4		6
	5/8 - 3/4			6		6
60	To 3/8			3		4	6
	3/16 - 9/16			4		4	6
	5/8			4		4	6
	3/4			4		6	6
72	To 1/2			3		4	6
	9/16 - 5/8			4		4	6
	11/16			4		4	6
	3/4			4		6	6
84	To 3/8			3		3	4
	7/16 - 9/16			3		4	6
	5/8			4		4	6
	11/16			4		4	6
	3/4			4		4	6
96	To 3/8			3		3	4
	7/16 - 11/16			4		4	6
	3/4			4		4	6
108	To 7/16			3		3	4
	1/2 - 11/16			4		4	6
	3/4			4		4	6
120	To 3/8			3		3	3
	7/16			3		3	4
	1/2			3		3	4
	9/16 - 3/4			4		4	6
132	To 3/8			3		3	3
	7/16			3		3	3
	1/2			3		3	4
	9/16			3		3	4
	5/8 - 3/4			4		4	4

 

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