Home » Buttwelding Fittings » ASTM A234 WPB BUTT WELDING PIPE FITTING STEEL PIPE LATERAL TEE ASME B 16.9 MSS SP43

ASTM A234 WPB BUTT WELDING PIPE FITTING STEEL PIPE LATERAL TEE ASME B 16.9 MSS SP43

classification,dimension of lateral tee,and its difference from a WYE.

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What is lateral tee?

A Lateral Tee is a pipe fitting that is similar to a tee but possesses a side outlet branch at 45 degrees. The branch direction of these tees is different from that of a Lateral Straight Tees, which has a branch pipe that is at 90 degrees to the run pipe.Lateral pipe fittings have two types: lateral tee and latrolet (also called Lateral Outlet).The lateral tee’s shape is like a pipe tee, the butt welding lateral tees are made from steel pipes or forgings, the manufacturing standard is ASME B16.9. there are also the forged lateral tee produced refer to ASME B16.11,the ends are socket welding and threaded.

Specification of lateral tee

Materials

Carbon steel: ASTM/ASME A234 WPB-WPC
Alloy steel: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP 911
Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N

ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti

ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H
Low temperature steel: ASTM/ASME A402 WPL 3-WPL 6
High performance steel: ASTM/ASME A860 WPHY 42-46-52-60-65-70

Size range: 1/2 to 60 inches(DN15-DN1500)
Pressure: SCH10-SCH160,XXS

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

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