Plain end pipe and beveled end pipe
While plain-end pipe is preferred, the use of beveled end pipe is acceptable providing that the wall thickness is .375’’/9.5mm or thinner and the bevel is 37-1/2 ± 2-1/2° or
30° as specified in ANSI B16.25 and ASTM A-53 respectively.
ERW pipe is one of the most popular types of pipe used today. Depending on the individual pipe and manufacturer, welding beads may remain on the surface (inside and out)
of the pipe. Always remove harmful weld beads near the pipe ends as they can cause raƩling of the roll grooving machine resulting in inaccurate grooves.
Spiral welded pipe
Spiral welded pipe may be used as long as the weld beads are removed from the gasket seating surface. It is also acceptable and recommended to weld a grooved end
nipple to the pipe end as shown below. Whenever you remove weld beads or projections from the gaslet sealing surface, use caution so as to not over-grind the surface.
AŌer grinding, always apply a proper rust-prevention coating to this area.
sealing surface of galvanized pipe, use caution so as to not over-grind the surface. AŌer grinding, always apply a proper rust-prevention coating to this area.
Galvanized pipe is acceptable
as long as the gasket sealing surface is
smooth and free from
scale and imperfections
that could affect gasket
sealing. Whenever you
remove welding beads or
projections from the
Heavy wall pipe
When you aƩempt to roll-groove pipe thicker than
.375’’/9.5mm, the metal may deform and heap up on both
sides of the groove rather than radially deforming and
protruding on the inside of the pipe. The extra heaped
metal on the sealing surface may preclude the coupling
housing from making metal-to-metal contact, which could
lead to joint failure. In such a case, you should grind off any
such extra metal to achieve a flat and smooth sealing
surface. A proper rust preventative coating must be applied
on the ground surface. Lede strongly recommends the
processing of cut-grooves on heavy or thick wall pipe.
Thicker than 9.5mm (0.375’’)
No or very little protrusion
Check gasket seating surface
Roll grooving set
371/2° or 30°
(ANSI B16.25 / ASTM A-53)
Spiral pipe Weld beads shall be removed Welded Spiral pipe with
a grooved nipple