How an Order Moves Through the Works
A service list is easy to print and harder to run. What matters to a buyer is the order in which the
stations are used, because the order determines whether the finished goods hold their dimensions. Here
is the path every batch takes through Gongyi Jinbangde Pipeline Equipment Co., Ltd.
Step One, Drawing and Cut List
The drawing and the quantity arrive together. The floor turns them into a cut list: which pipe, which
length, which thread, which flange, which fitting, which test pressure, which coating. Nothing is cut
until the cut list is signed, and nothing is threaded until the cut list has been checked against the
drawing a second time.
Step Two, Saw and Square
Pipe is drawn from stock or sourced to the required heat and taken to the cold saw. Each length is cut
to the list, squared, deburred and measured. The square end is the foundation of a true thread, so this
step is never rushed to protect a later station.
Step Three, Die Head and Gauge
The squared end goes to the threading machine, where the rotating die head cuts the spiral thread in
passes. Oil floods the cut, chips are cleared, and the finished thread is comb gauged and ring gauged
before the piece is accepted. The go-mark is painted only after the gauge agrees.
Step Four, Machining and Fitting
Flanges and butt-weld fittings are machined and finished in parallel with pipe threading. When the
pieces meet, they meet as a matched set: pipe that runs true, flanges that face flat, fittings that
bevel clean. This is the advantage of running all six services under one roof.
Step Five, Test Bench
Assembled work is pressure tested to the specified figure for the specified hold time. The clock and
the gauge settle every argument. A passing joint gets its chart; a failing joint goes back one station
and is reworked before it can proceed.
Step Six, Coating and Port Pack
Coating follows the specification, packing follows the shipping route, and the document pack follows
the goods. When the crate is closed, the story of the batch is complete: heat numbers, gauge standard,
test chart and packing list.
Six stations, one floor, one document pack. A buyer never has to guess which supplier did which
operation or which gauge passed which thread.
Gongyi Jinbangde Pipeline Equipment Co., Ltd.
Materials, Standards and Tolerances
We work to the standards named on the drawing: thread forms in NPT, BSPT and metric patterns, flange
and fitting dimensions to the common national and international tables, and test pressures set by the
project specification. Where a standard is not named, we confirm the intended gauge and thread form in
writing before the first cut, because a thread cut to the wrong standard cannot be reworked into the
right one.
Tolerances are held at the machine rather than inspected in after the fact. The die head, the lathe and
the grooving roll are set to the drawing, and the first piece of every batch is gauged and held as the
reference for the run. If the reference shifts, the run stops. That habit is what allows us to promise
that the hundredth thread matches the first.
Working With Project Buyers
Most of our work arrives as a project order: a schedule, a set of drawings, a destination port and a
date. We quote the whole scope, run it through the six stations, and deliver it as one document pack.
For buyers who need only part of the scope, every service is also available on its own, from threading
an existing pipe stock to running a certified hydro test on assemblies built elsewhere.
To discuss a project, send the scope to our contact page. We will reply with a
price, a lead time and the gauge standard we intend to work to, and we will say plainly if any part of
the scope sits outside what this works can hold.