ASME B16.9 WP316L 45DEG SMLS Lateral Tee 20″ SCH80

Type: 45DEG SMLS Lateral Tee
Material: 316L (UNS S31603/Alloy 1.4404)
WT: SCH80
Size: 20″ (DN500)

Chemical Composition and Mechanical Property for 316L
Steel Grade	Chemical Composition									Mechanical Performance
	C(Max)	Si(Max)	Mn(Max)	P(Max)	S(Max)	Ni	Cr	N(Max)	Mo	Tensile Strength (Min)	Yield Strength (Min)
										Mpa	Mpa
316L	0.03	0.75	2.00	0.045	0.03	10.0–14.0	16.0–18.0	0.1	2.00–3.00	485	170

Dimensions of Butt Weld-Straight Lateral Tee

Nominal Pipe Size		Dimension
DN	NPS	X and Y	Z
25	1	146	45
32	1.1/4	159	45
40	1.1/2	178	51
50	2	203	64
65	2.1/2	241	64
80	3	254	76
90	3.1/2	292	76
100	4	305	76
125	5	343	89
150	6	368	89
200	8	445	114
250	10	521	127
300	12	622	140
350	14	686	152
400	16	762	165
450	18	813	178
500	20	889	203
600	24	1029	229
650	26	1308	267
700	28	1442	286
750	30	1524	299
800	32	1626	311
850	34	1727	330
900	36	1829	350
For straight tee X=Y, reducing tee X Y is selected according to DN.

Lateral Tee is divided into welding lateral tee and seamless lateral tee.

What is the difference between lateral tee and True WYE?

The lateral tee divide two branch pipes:one is same direction with the inflow pipe, the other have a 45 degree angle to inflow pipe. The WYE have two branch pipes at a 45 degree angle between them, and the two branch pipes are symmetrical to the centerline of the inflow pipe which means the two outflow direction are both at 22.5 degree to the inflow direction.
Comparing the two lateral pipe fittings, when the inflow pipe direction is horizontal to the ground,we can choose the lateral tee for better support from ground,and when the inflow pipe direction is vertical, then we’d better use the WYE fitting, it will bring a symmetrical interaction force to the piping system. Such designing will make sure the pipe in a stable support when running.