A stub end always will be used with a Lap Joint flange,as a backing flange;both are shown on the image below.This flange connections are applied,in low-pressure and non critical applications,and is a cheap method of flanging.In a stainless steel pipe system,for example,a carbon steel flange can be applied,because they are not come in contact with the product in the pipe.

 

Sch	NPS	OD	T	G	F	R	kg
Sch.10S	1/2″	21.3	2.11	34.9	50.8	3.18	0.07
Sch.10S	3/4″	26.7	2.11	42.9	50.8	3.18	0.1
Sch.10S	1″	33.4	2.77	50.8	50.8	3.18	0.16
Sch.10S	1 1/4″	42.2	2.77	63.5	50.8	4.76	0.22
Sch.10S	1 1/2″	48.3	2.77	73	50.8	6.35	0.25
Sch.10S	2″	60.3	2.77	92.1	63.5	7.94	0.43
Sch.10S	2 1/2″	73	3.05	104.8	63.5	7.94	0.57
Sch.10S	3″	88.9	3.05	127	63.5	9.53	0.73
Sch.10S	4″	114.3	3.05	157.2	76.2	11.11	1.09
Sch.10S	5″	141.3	3.4	185.7	76.2	11.11	1.47
Sch.10S	6″	168.3	3.4	215.9	88.9	12.7	2.15
Sch.10S	8″	219.1	3.76	269.9	101.6	12.7	3.22
Sch.10S	10″	273.1	4.19	323.9	127	12.7	5.13
Sch.10S	12″	323.9	4.57	381	152.4	12.7	8.16
Sch.10S	14″	355.6	4.78	412.8	152.4	12.7	10.89
Sch.10S	16″	406.4	4.78	469.9	152.4	12.7	12.7
Sch.10S	18″	457.2	4.78	533.4	152.4	12.7	17.24
Sch.10S	20″	508	5.54	584.2	152.4	12.7	21.77
Sch.10S	24″	609.6	6.35	692.2	152.4	12.7	27.22
Sch.40S	1/2″	21.3	2.77	34.9	50.8	3.18	0.09
Sch.40S	3/4″	26.7	2.87	42.9	50.8	3.18	0.12
Sch.40S	1″	33.4	3.38	50.8	50.8	3.18	0.17
Sch.40S	1 1/4″	42.2	3.56	63.5	50.8	4.76	0.25
Sch.40S	1 1/2″	48.3	3.68
Sch.40S	2″	60.3	3.91	92.1	63.5	7.94	0.61
Sch.40S	2 1/2″	73	5.16	104.8	63.5	7.94	0.8
Sch.40S	3″	88.9	5.49	127	63.5	9.53	1.13
Sch.40S	4″	114.3	6.02	157.2	76.2	11.11	1.87
Sch.40S	5″	141.3	6.55	185.7	76.2	11.11	2.28
Sch.40S	6″	168.3	7.11	215.9	88.9	12.7	3.57
Sch.40S	8″	219.1	8.18	269.9	101.6	12.7	6.07
Sch.40S	10″	273.1	9.27	323.9	127	12.7	10.07
Sch.40S	12″	323.9	9.53	381	152.4	12.7	14.29