A Brief Introduction to
Rolled Pipe Threads on Galvanized and Black Carbon Steel Pipe
Shanghai Pan China Fastening
Systems Co., Ltd is having ISO 9001-2008certification;
we are specialized in production of carbon steel pipe nipples from 1/8”-4”
1. Perfect Mating
Between Male & Female Thread Increases Leak Tightness Greatly
100% Perfect Thread
Teeth Profile – Excellent Teeth Surface Enhance Mating – Zinc Coating Kept –
More “Thickness” of Pipe.
2. Excellent
Rust-Resistance on Rolled Thread Pipe
1. Original hot-dip
zinc coating of the galvanized pipe remains intact, and is not cut away as with
lathe cut ones.
2. The density of the
rolled thread pipe is increased greatly and makes, at least, the “same
thickness” as the original pipe itself, and forms an anti-oxidization layer of
high metallic density against rusty.
3. Pipe Material Not
Cut Away Makes Thread Mechanical Connection Much Better
The mechanical
properties of the pipe thread are greatly improved as no material is cut away
and the weight per unit length of rolled thread pipe remains unchanged, and
further more the metal density is increased.
Perfect Thread - Enhance Mating
– Zinc Coating Kept – More “Thickness
Perfect
Thread:
100% perfect teeth profile (geometry size), produced by long-life rollers
(tools), fundamentally guarantee the excellent integrity with female cut
thread. The cut teeth, by easyworn knife (tools), vary in profile time to time,
can’t guarantee it.
Excellent
Surface Enhance Mating: Surface roughness of rolled
thread is improved dramatically by 5 – 7 levels to Ra < 0.4 due to the
thread to be formed by the roller rolling on the pipe, and the cut thread is
by, knifing in the pipe, Ra > 3.2. Rolling makes much better mating between
the male and the female thread.
Zinc
Coating Kept: Rolled thread of galvanized pipe is sealed mainly
by original zinc coating which is metallic layer (hard) sealing & very good
for suffering the weight of the pipe, plus traditional tape (soft) sealing. And
the cut thread is sealed 100% by tapes (soft) which are inappropriate for
suffering the weight and can’t be 100% sure for lasting a period of years
More
“Thickness” of The Pipe: As no material is cut away, the
weight per unit length remains same, plus a rolled teeth surface is much
harder, those bring improvement in mechanical properties.