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Material
| Steel Grade | Chemical Composition % | |||||||
| C | Si | Mn | Cr | Ni | Mo | S | P | |
| ZG25CrNiMo | 0.25-0.30 | 0.20-0.40 | 0.70-0.90 | 0.40-0.70 | 0.40-0.70 | 0.15-0.25 | ≦0.025 | ≦0.025 |
| Standard | Yield Strength Rp0.2 /MPa | Tensile Strength Rb / MPa | Elogation A / % | Reduction of Area Z/ ％ |
| 60K | ≥414 | ≥586 | ≥18 | ≥35 |
| 75K | ≥517 | ≥655 | ≥18 | ≥35 |
| 80K | 585-660 | ≥725 | ≥18 | ≥35 |
Normally we will follow 75K standard.
The material will be quenched to meet 75K requirement.
We supply the castings for our customers with pre-machining.
Prodution process
Introducing our top-quality castings for BOP, designed to enhance the performance and reliability of your well control equipment. These castings are crafted with precision and attention to detail, ensuring optimal functionality and longevity in the most demanding drilling environments.
Our BOP Annular castings are engineered to deliver superior sealing capability, providing the highest level of well control and safety. With their robust construction and advanced design, these castings are built to withstand extreme pressure and temperature conditions, ensuring long-lasting performance and durability.
Our Well Control Equipment castings are manufactured to the highest standards, utilizing the latest technologies and materials to deliver unparalleled quality and performance. Whether you are drilling in shallow or deep waters, our castings will provide the reliability and efficiency you need to get the job done right.
We got API 20A certificate.
The weight for the castings of BOP is always around 500kg to 30000kg per piece.
1)pattern making
We have our own pattern making workshop.
Normally we use wooden pattern.
2)draw the line and machining
Before we do the machining,we will usually check the margin and draw the line.
3)machining and inspection
We can do all machining for the casting parts.
And all castings should be inspected by UT and MT.
About Haitai
In 2003, Haian Haitai Casting Co.,Ltd. was founded. We offer big steel castings made of low or alloy steel that weigh between 3 and 190 tons per piece.
On a monthly basis, we provide 1000 tons of casting parts for petroleum machinery to customers in Hebei Province Renqiu City, Shanghai Shenkai Group, Yanchen City, and some Russian clients.
Our steel castings have API certification.
Our services only include UT and MT;
we cannot provide RT inspection.
The majority of the BOP castings are pre-machined.
Testing Equipment
| No. | Equipment Name | Quantity(Set) |
| 1 | Sand analysis equipment | 1 |
| 2 | Impact sample low temperature meter | 1 |
| 3 | Direct reading spectrometer(OXFORD) | 2 |
| 4 | ONH analyzer | 1 |
| 5 | ZEISS metallurgical microscope | 1 |
| 6 | Pendulum impact tester | 1 |
| 7 | Microcomputer controlled electro-hydraulic servo universal test machine | 5 |
| 8 | Various hardness tester | 4 |
| 9 | Magnetic defect detector | 5 |
| 10 | Ultrasonic flaw detector(digital) | 1 |
| 11 | CX-52 Total station | 1 |
| 12 | Stylus roughness meter | 1 |
We do the test according to diffrent production step,
such as chemical composition,UT,MT and mechanical property.
In 2021,Haitai inspection and testing center got approval from CNAS.
Delivery
Our company is near to Shanghai port and we can supply different packing according to customers' specification.
