The Manufacturing Process of steel pipe

Steel pipes are made by two different processes. The overall production method for both processes involves three steps.

First, raw steel is converted into a more workable form. Next, the pipe is formed on a continuous or semicontinuous production line. Finally, the pipe is cut and modified to meet the customer’s needs.

Measurement size & Testing
JIS seamless pipe testing covers many specifications, including alloy, size, toughness and composition. Those using steel products purchase the product that fulfills the requirements they need for what they are building.
Packed in wooden crates, wrapped in plastic, and suitably protected for sea-worthly delivery or as requested.
Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.
How to packing the seamless pipes?
Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.
Weight of bundle – up to 5000 kg upon request of customer.
Each bundle is furnished with three tags.
LSAW Pipe Manufacturing Process
Longitudinally Submerged Arc Welded Steel pipes

LSAW (Longitudinally Submerged Arc Welded Steel pipes) in leaflets plate as raw material, the steel plate in the mold or molding machine pressure (volume) into using double-sided submerged arc welding and flaring from production.

UOE Pipe Manufacturing Process
UOE (Uing and Oing forming) Pipes

UOE(Uing and Oing forming) is a method used for production of longitudinally welded large diameter pipes.

JCOE Pipe Manufacturing Process
J-ing, C-ing and O-ing pipes

The mill adopts continuous axis contorting J-C-O(J-ing, C-ing and O-ing)process with characteristics of high forming accuracy and efficiency as well as balanced distribution of forming stress.

Anti layer structure
Anti rust process

Finally emphasis on the importance of surface treatment in the production, strictly control the process parameters when anti rust.

Galvanized pipe process characteristics
Hot Dip Galvanized Steel Pipe

Zinc sulfate biggest advantage is the current efficiency of up to 100%, the deposition rate, which is the other galvanizing process unparalleled.

Self-propagating High-temperature Synthetic process

Self-propagating high-temperature synthesis (SHS) and processes based on SHS are currently being developed the world over for the production of powders and near-net shape components of advanced materials.

Flanges Manufacturing Process
Flanges General

Our manufacturing process is highly sophisticated and is divided into various departments supervised by experienced industry experts.

ERW Pipe Manufacturing Process
 ERW pipes means Electric Resistance Welded Pipes

Our manufacturing process generally involves the following stages in a step by step procedure.

Seamless pipe process

According to manufacuring process of seamless pipe, seamless pipe can be divided into hot rolled seamless tube and cold drawn seamless tube.

Hot rolled seamless steel pipe

Our manufacturing process generally involves the following stages in a step by step procedure.

SSAW Manufacturing Process
Spiral submerged-arc welding pipes

Spiral welded pipe production by submerged arc method is based on using tandem welding technique for joining inside and outside coil edges, which have been trimmed and beveled by carbide milling for high quality weld structure.

RHS/SHS manufacturing Process
Pre-galvanized steel pipes

Rectangular/ Square hollow section are formed from coils and then ran through a series of dies.


Length of Pipes

Piping lengths from the factory not exactly cut to length but are normally delivered as:
Single random length has a length of around 5-7 meter
Double random length has a length of around 11-13 meter
Shorter and longer lengths are available, but for a calculation, it is wise, to use this standard lengths; other sizes are probably more expensive.

Ends of pipes
Ends of Pipes

For the ends of pipes are 3 standard versions available.

  • Plain Ends (PE)
  • Threaded Ends (TE)
  • Beveled Ends (BE)

The PE pipes will generally be used for the smaller diameters pipe systems and in combination with Slip On flanges and Socket Weld fittings and flanges.
The TE implementation speaks for itself, this performance will generally used for small diameters pipe systems, and the connections will be made with threaded flanges and threaded fittings.

Root faceThe BE implementation is applied to all diameters of buttweld flanges or buttweld fittings, and will be directly welded (with a small gap 3-4 mm) to each other or to the pipe. Ends are mostly be beveled to angle 30° (+ 5° / -0°) with a root face of 1.6 mm (± 0.8 mm).

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