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As for the chemical composition, we do test and analysis every batch of the casting parts to ensure the chemical components meet the design requirements. For every package of the molten iron, there is a tensile test specimen in the lab, we check it one by one. So we can ensure that the casting always meet the requirements, and ensure every coupling and fitting are safe enough when it works under the rated working pressure.

As for the bolts and nuts, we choose 40 Cr as its material. Mechanical property of the bolts and nuts can reach to grade 8.8 after heat treatment. We can only use one wrench to install them, and the bolts and nuts are much better in reliability and fastness.

CASTING SAND TEST

Casting sand is one of the most important factor of enhancing the surface smoothness of the products.Our company introduced advanced casting sand analysis equipment, in the light of the property of the casting sand such as the pressure to sands, moisture content, gas permeability, mud content, wet-thermal tensile strength,theargil, thebudgust,and the blue absorption power, processing a strict analysis testing to enhance the quality of casting sand, so as to improve the fineness and the qualified rate of the products. Really attach importance to the details of the product’s quality.

METALLOGRAPHIC TEST

Metallographic test mainly processing the tests to the component of the casting part, to ensure the mechanical properties of the products. The testing adopt 500-600 times optical microscope to process the testing of molten iron’s nodularization rate, to ensure the nodularization rate of every cast of the molten iron to be above the grade 3. This testing is one of the important part of production process to guarantee the quality.

CHEMICAL COMPONENT TEST

There are complete equipments in the Chemical Laboratory, such as molten iron analysis equipment, carbon and silicon analysis equipment, spectrophotometer, etc. They are used to process the fast and accurate tests to the main components including carbon, silicon, manganese, sulfur, phosphorus and the microelements such as tombarthite and magnesium in the raw materials and finished products, to ensure the scientific proportioning of the raw materials. At the same time proceeding the online control of the components in the production process, to ensure every process of the production meets the requirements by applying the scientific composition ratio.

MECHANICAL PROPERTY TEST

Mechanical property testing laboratory introduced Computerized Electro-hydraulic Servo Universal Testing Machine to proceed the whole series of stretching, compressing, bending tests for the materials such as bolts and nuts which are required to reach the mechanical property performance index. By testing, the torque of bolts reach to grade 8.8, nuts reach to grade 8. All the casting products of our foundry reach the criteria of OT450-10,The hardness of our cast fittings, bolts and nuts are reach criterias of FM1920, UL213 by Blovi hardness testing.

GASKET RING SEALING TEST

The gasket ring is the important part of grooved joint fittings. The quality of gasket ring directly related to the quality guarantee period of construction projects. All the gasket rings of our products are produced by subsidiary factory, so that to ensure the scientific formula and optimization of production process. At the same time, every batch of the gasket rings are proceeded to strictly property test, including hardness, strength, stretching rate, aging in hot air, oil resistance, etc. The tests prove that every batch of the gasket rings meet the criteria of FM1920, UL213, and guarantee a long time usage period.

GROOVED JOINT FITTING PROPERTY TEST

Grooved joint fitting property jaboratory meet the requirement and criteriaof FM,UL. Including hydrostaticpressure test, compression strength, withstanding sealing performance, bending moment, torque, vibration, low-temperature resistance, refractory property, etc. The evaluation and routine tests for the new products, and the product performance tests are all conducted in this laboratory. And every batch of grooved joint fittings are all proceeded the destructive test, to ensure meet the criteria of FM1920, UL213