• The produced movable elbow is a metal pipe joint with ball bearing, with its specification being 1~4 and its rated working pressure being 14~140MPa( 2,000psi~200,00psi)
  • It is feasible to provide various models of movable elbows used under ordinary temperature, low temperature and sulfurous gas as well as the maintenance packages.
  • The movable elbows have 2 types: long radius elbow and short radius elbow. The major radius movable elbow has smooth drift diameter, which can minimize the resistance generated when liquid passes
  • The resistance to erosion and corrosion of fluid for the wall thickness at the turning position of long radius elbow is better than short radius elbow. However, long radius elbow is also used in consideration of the limit of field installation space or lower pressure.
  • The blank bend of movable elbow is molded on the numerical control machine, which has even wall thickness and long service life.
  • The wall thicknesses difference at the positions of inside and outside circular arcs reaches FMC standard, and its appearance quality can match with the imported blank
  • The movable elbow has 3-ball groove design, so that it can effectively bear overload and radial load, it is stable at the time of bearing pressure and the vibration in pipeline is smaller at the time of bearing various loads
  • The sealing element is made of synthetic rubber, equipped with the blowout prevention ring and designed with the pressure release vent, so that it is possible to automatically reduce pressure in case of any leakage in the sealing element to prevent the pressure from being accumulated in the ball groove cavity, and thus greatly improving its safety
  • For the field maintenance of movable elbow, it is only required to make lubrication occasionally to ensure its normal operation.
High-pressure movable elbow
  • The hammer unions which are produced on the basis of the absorption and digestion of the technologies transferred by American SPM and are used for connecting various pipeline include threaded connection type, welded type and hydrogen sulfide gas resisting type, with the specification being 1~4 and the cold working pressure being 7MPa~140MPa (1000Psi ~ 20000Psi).
  • For the convenience of distinguish, the unions with different pressure grades have different color identifications and have obvious specification connection modes and pressure grade marks on the wing nuts.
  • The specification and model of common union (threaded connection type): FIG100, FIG200, FIG206, FIG400, FIG402, FIG602, FIG1002 and FIG1502. The rated working pressure: 7MPa (1000psi) ~105MPa (15000psi).
  • Weld union specification: FIG20、FIG60、 FIG1002、FIG1502、FIG2002;rating working pressure : 14MPa(2000psi)~140MPa(20000psi)
  • Prevent weld sulfur: FIG602, FIG1002, FIG1502、FIG2202, Tr120×6, Tr150×6、Tr180×8;rating working pressure : 35MPa(5000psi)~105MPa(15000psi
  • The seal ring is made of imported sizing materials through compression, so that its loading capacity and sealing property are improved greatly and prevent the joint from corrosion. The sealing types differ according to the pressure and application range.
  • Regardless of position and space, the wing nut and rigid self-locking type ACME thread are so designed that they can be quickly tightened and dismounted without using special tools.
  • The structure and coupling dimension of all the unions comply with the international product standards, in the unit of inch size the seal rings of unions completely may be interchanged with the products of American SPM and FMC companies the marks of specification and pressure on the wing nut are formed through one-time die forging.
  • The spherical joint processed by the high-precision numerical control machine and the LP thread processed by the imported special cutter provide reliable guarantee for high pressure seal.
  • All the wing nuts are processed by the numerical control machine, which have no relief groove, so that the product may have sound strength and high bearing pressure The materials for welding unions and the dimension of welding bevel comply with the requirements of APISPEC16C specification.
  • The unions used under the sour environment are designed and manufactured according to American NACEMR0175 Sulfide Stress Cracking Resistant Metallic Materials for Oilfield Equipment and APIRP- 14E standard.
  • The function of reducer unions is to realize the switch connection between the pipelines with different diameters and threads.
  • All the reducer unions is produced through the forging by the high-strength alloy steel and the finish machining by the numerical control machine, with convenient and reliable connection.
  • Pressure thread seal type, non-pressure thread seal type, integral type, and welded type, with specification being 1~4 and pressure being 7MPa~105MPa The length of integral straight pipe includes 1m, 1.5m, 2m, 2.5m and 2.8m. Provide the high-pressure straight pipes with various dimensions and pressures that adapt to sour environment according to the user needs.
  • Pressure threaded seal end connection is consist of : FIG402 union, FIG602union, FIG1002 union, FIG1502union . Rating working pressure between 28MPa(4000psi)and 105MPa (15000psi).
  • Non-pressure threaded seal end connection is consist of :FIG206 union , FIG602 union, FIG1002 union, FIG1502 union. Rating working pressure between 14MPa(2000psi)and 105MPa (15000psi).
  • Solid end connection is consist of :FIG602 union, FIG1002 union , FIG1502union. Rating working pressure between 42MPa(6000psi)and 105MPa(15000psi).
  • Prevent sulfur solid end connection is consist of: :FIG602 union, FIG1002 union, FIG1502 union. Rating working pressure between 35MPa(5000psi)and 70MPa(10000psi)
  • Welding union is consist of :FIG402union、metric screw threaded union , FIG602 union, FIG1002 union, FIG1502union. Rating working pressure between 28MPa(4000psi)and 105MPa (15000psi).
  • Welding flange end connection is consist of: 21/16″flange, 29/16″flange、31/8″flange, 41/16″ flange, 31/16″flange. Rating working pressure between 21MPa(3000psi)and 105MPa (15000psi

A flange is a method of connecting pipes, valves, pumps and other equipment to in piping system. It also provides easy access for cleaning, inspection or modification. Flanges are usually welded or screwed. Flanged joints are made by bolting together two flanges with a gasket between them to provide a seal.


An elbow is a pipe fitting installed between two lengths of pipe or tubing to allow a change of direction, usually a 90° or 45° angle. The ends may be machined for butt welding, threaded or socketed, etc. When the two ends differ in size, the fitting is called a reducing elbow or reducer elbow.


A reducer allows for a change in pipe size to meet hydraulic flow requirements of the system, or to adapt to existing piping of a different size.


A tee is the most common pipe fitting. It is available with all female thread sockets, all solvent weld sockets, or with opposed solvent weld sockets and a side outlet with female threads. It is used to either combine or split a fluid flow. It is a type of pipe fitting which is T-shaped having two outlets, at 90° to the connection to the main line. It is a short piece of pipe with a lateral outlet. A tee is used for connecting pipes of different diameters or for changing the direction of pipe runs. They are made of various materials and available in various sizes and finishes.

Boiler tubes

One of the tubes in a boiler that carry water (water-tube boiler) to be heated by the high-temperature gaseous products of combustion or that carry combustion products (fire-tube boiler) to heat the boiler water that surrounds them.


Hoisting Equipment

  • All important parts of hook are made of special alloy steel casting
  • Equipped with a hydraulic snubber assembly to protect tool joints when making up/ breaking out connections.
  • Equipped with the reliable safety devices on the hook.
  • The major load bearing parts of every hook are subjected to non destructive testing.
  • The hooks conform to API 8A and API monogram can be used.


  • Joining traveling block and hook together reduces overall length and can help satisfy the requirements of operating a top drive.
  • The sheave groves are hardened by medium frequency induction to provide extended service life.
  • Working sheaves are supported by double row conical roller bearing and each bearing in individually lubricated.
  • Equipped with reliable safety device on the hook.
  • The major load bearing parts of every hook blocks are subjected to non destructive testing.
  • The hook blocks conform to API 8A and API monogram can be used.


Hook Blocks
  • Standard goose neck connection, screw thread conform to API 5B .
  • Equipped with standard bails and double pin (male) alloy sub.
  • The wash pipe and packing assembly are cartridge type and can be replaced on the floor without disconnecting the rotary hose and/ or gooseneck.
  • The gooseneck is provided with an outlet for wire line logging.
  • Equipped with 4" API hose connection.
  • The swivels conform to API specification 8A and API monogram can be used.


Chain Block
Chain Block
Chain Block

A tackle (lifting mechanism) which uses an endless chain rather than a rope, often operated from an overhead track to lift heavy weights especially in workshops.