Yulin Machinery manufactures a complete line of quality API 6A products such as valves, spools, Casing heads, Xmas Trees and can provide the exact valves and actuators to meet the most demanding application requirements.
Our API 6A Products are available in an extensive range of designs, materials, sizes and pressure classes and are in full conformance with API and NACE specifications. All API 6A products are designed in accordance with API 6A and where applicable with ASME VIII Div.1 and Div.
The API 6A products provides positive shut-off of fluids and gases under extreme service conditions.
Yulin Machinery uses only high-quality materials inspected & tested to International Standards and utilizes advanced manufacturing technology with special emphasis on safety, quality, and long service life of our products, to ensure that our clients receive the “best in class” products available from us at a competitive price and delivered on time.
The forged material can ensure the best rigidity and strength under maximum rated operation pressure without inherent flaw of cast.
Other properties found in forging include greater impact resistance, resistance to fatigue cracking, particularly when cycling at either high or cryogenic temperature.
Overdesigned wall thickness and adaptation of high strength tie bolts are convenient for valve maintenance and sufficient to bear the stress of pipe.
The internal parts of valve are carefully designed and selected to ensure reliability under all kinds of work conditions.
Since a variety of materials are available, Yulin Machinery Products can be used with various fluids and gases including petroleum based oils and extreme sour gas service.
Yulin Machinery API 6A product design is developed using the latest software based analysis tools. At the design stage, all projects are analysed using 3D solid modeling tools. Benefits include reduction of development time and costs, improved product quality, and ability to solve field problems for customers.
Product flexibility and accuracy is assured.
Finite Element Analysis (FEA) is a very important step of the development stage and ensures the best possible performance requirements.
Valves operational problems, pressure/temperature related deformations and flow-related forces within a valve can be evaluated.
Yulin Machinery uses the FEA for predicting failure due to unknown stresses by showing problem areas in a material and allowing designers to see all of the theoretical stresses within.
This method of product design and testing is far superior to the manufacturing costs which would accrue if each sample was actually built and tested.
During any analysis project, it is the responsibility of the Yulin Machinery analyst to verify that analysis results conform to the physics of the problem under study. Understanding the response of a structure or manufactured product allows effective design decisions to be made in developing structures and products that are functional, meet all engineering requirements, and can be manufactured and assembled.
Computational Fluid Dynamics (CFD) is used to simulate operating flow conditions.
Evaluation of Valve CV coefficient and convective heat transfer coefficient takes place at the design stage.
Size and pressure ranges that meet or exceed the requirements of API 6A, latest edition. Special range available on customer request and high temperature design acc.to API 6A Annex “G” available.
Yulin Machinery's API 6A products are designed in accordance with API 607 & API SPEC 6FA where applicable.
The full round bore design allows the fluid to flow through the valve smoothly without causing turbulence and minimize pressure drop. The absence of surface cavity eliminates the accumulation of foreign matter and allows passage of tools through the valves.
Quality levels from PSL1 to PSL4 available.
Valve trims for any service, including H2S, CO2, high – low temperature and extremely corrosive environments.
Every product is subjected on a routine basis to different non-destructive testing, like dye penetrant test on butt weld ends and on all hard faced and cladding areas.
Non-destructive tests are also carried out on the critical areas as defined by ASME B16.34.
Helium leak test
Personnel performing NDT are trained and qualified to EN 473/ ASNT-SNT-TC-1A.
Every product is subject to a pressure test in accordance with the standard API 6A.
The rated pressure for the applicable pressure class is in accordance with API 6A.
Each product is identified on proper name plate and on the body as required by API 6A, MSS-SP 25, ASME B16.34 Name plate carries all information on rating, size, valve body and trim material, customer tags.
Body marking includes material designations (per ASTM) and heat code and of course the trade mark
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Yulin Machinery is one of the Chinese manufacturers of API 6A gate valves. The API 6A gate valves manufactured by Yulin Machinery are divided into ball screw gate valves, API 6A expansion gate valves, API 6A hydraulic gate valves, Slab Gate Valves, etc. Their functions are as follows.View More
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