Further, API committee decided to producer numerous codes on casting quality, these are created by Com. 20 'Supply Chain Management' at API.
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ASME B16.34 addresses the Casting requirements per clause 5.1.3 and 8.3, etc.
A few discussion questions with a Foundry with response as below:
a) How to identify porosity and voids?
Answer: Surface porosity can be found either visually or with MT. MSS-SP55 standard ' it has a large number of pictures as well as whether the defects found would be acceptable or reject- able. Internal porosity / voids are found using UT or RT ' the standards for this are MSS SP 94 for UT and MSS SP 54 for RT. We can also look at ASME section XIII for NDT testing.
b) What porosity and voids are considered detrimental?
Answer: This would depend entirely on what the castings are used for ' load bearing components are normally tested to API 8C (or similar) with a level 1 for critical areas and level 2 for non- critical. Castings for heaters are level 3 or 4 again depending on if it is a critical area or not. You will never find a casting that would be 100% level 1 in the entire part (unless they are small castings and possibly investment castings)
c) How are they fixed and reinspected?
Answer: This depends on what standard you are testing to. Each ASTM standard has this spelled out in one of the sections (blend out the defect or weld it up) ' you would have to check the standard that the castings were made to, to determine any repair procedures.
d) What documentation is required for cosmetic and other than cosmetic repairs?
Answer: Some customers require a weld map (pictures of where the defect was in relation to the casting) but generally if the cavity of the weld is greater than 20% of the wall thickness, you will have to RT that area and the report from the testing company would be sufficient.
e) What processes and techniques are allowed for repairs at foundry and at machine shop?
Answer: Castings in a foundry are usually welded using stick welding and then tempered to relieve the stresses, on a machined surface sometimes they will use MIG to keep the heat to a minimum depending on the size of repair necessary ( all depends on what was found and marked up as a repair).
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The valve is used to change the passage section and the flow direction of the medium. It has the functions of diversion, cutoff, regulation, throttling, check, split or overflow relief. Valve castings are control components in pipeline fluid delivery systems. They come in a wide variety of sizes and sizes.
Valve castings are widely used in chemical, petrochemical, petroleum, paper, mining, electric power, liquefied petroleum gas, food, pharmaceutical, water supply, and drainage, municipal, mechanical equipment, electronics industry, urban construction, and other fields.
Our foundry is a reliable valve parts manufacturer and supplier for valve clients all over the world. We can make all kinds of casting valve components for a check valve, butterfly valve, ball valve, gate valve, control valve, globe valve, plug valve, etc.
We can offer the scale of Gate Valve Castings from our foundry. Steel gate valve castings can be used for steam, water, air, oil, gas, and non-acid fluids. These valve castings are specially designed to endure high temperatures and load. As per the client's requirements, we can customize different gate valve castings.
Globe Valve Casting is widely used in the Pharmaceutical, Chemical, and petrochemicals industries. This industry has a high demand for Globe Valve Casting. As one of the best valve casting manufacturers, our product has Long-lasting and stable properties. It is welcome by our customers because of its comfort of fitting, supreme tensile energy, and accurate engineering.
Ball Valves Casting is the most exported one in our foundry. It is accepted by our customers at reasonable prices, trusted quality. These castings are broadly used in railway industries for air dryer systems with their hardy frame, greater services, and conventional dimensions
As per the material specification and dimensions of valve casting parts, we can make them in different casting processes:
Sand Casting: Also a casting process for valve casting parts. Sand casting is suitable for both steel and iron valve castings. Compare with lost foam and lost wax castings, it is more suitable to make larger valve components. Normally, we will need to leave more machining allowance for further machining operation. The max weight we can cast is around 2 tons per piece.
Lost Wax Casting: Can make cast steel valve components, like carbon steel, stainless steel, and other cast steel alloys. Lost wax casting is a precision casting method for valve components. So we can achieve good dimensions and tolerances, smoother surface. Stainless steel valve casting parts are widely used in the silica sol casting process, which is another lost wax method. We can use this casting process for butterfly valves, ball valves, etc.
If you want to learn more, please visit our website valve parts casting exporter.
Lost Foam Casting: This casting method is more suitable for making precision cast iron valve parts. It can also get a good surface finish and size. Such as net shape or near-net shape valve castings will need no machining or just little machining allowance.
Most importantly, valve casting provides an easier and less time-consuming way to make replacement parts when a system's current valves break down and deteriorate. We believe that Your drawing + our technology = Satisfactory product
The common materials and standards are as below:
To supply finished valve casting parts, we have machining equipment as well (NC lathe, CNC, boring machine, drilling machine, etc) for different machining requirements. Besides, we also have the hydraulic testing capability to ensure workable valve castings. For large dimensions valve casting parts, to avoid casting defects, it is necessary to do magnetic particle testing and ultrasonic testing after casting.
In conclusion, you can enjoy lots of benefits to buy valve casting parts from our foundry. Like wide material selection, many casting methods, machining service, and so on. Once cooperating with us, you will feel lucky to cooperate with such a good supplier for our high quality and competitive prices. Even if you would like to source forged valve components, do not worry, we can also provide you with forged valve parts from another forging company. Just please contact us once you have the demands of valve components.
Q 1: What about the leading time?
A: Generally speaking, the leading time is about 35 days. But please confirm the exact delivery time with us as different products and different quantities will have different leading times.
Q 2: How to get a sample?
A: Sample order is acceptable. Please contact us and make sure what sample do you need. in general,It will take 25 days to finish your sample.
Q 3: What value-added services do we provide?
Q 4: What other Valve Casting parts can you supply?
A: Valve Body, Valve disc,Valve bonnet, Valve gland
Q 5:How to place an order?
A: Leave a message, we can get your feedback immediately online.
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