What is black malleable Pipe Fittings？
Black malleable pipe fittings refer to malleable pipe fittings that have not been galvanized. In the daily work of the business department, users often mention different requirements for blank parts, black pipe fittings, galvanized pipe fittings, etc. First, explain the blank. The blank is a product that has not undergone any subsequent processing after casting. The blank is relative to the finished pipe fittings. Black malleable pipe fittings are the finished products processed by such processes as roughcast edge cutting, correction and threading. Black malleable pipe fittings are easy to rust and are mostly used in handicrafts. The black pipe fittings are then processed, painted, worn and other processes to make exquisite industrial style handicraft pipe fittings.
Features of black malleable pipe fittings
1. Black malleable pipe fittings shine with the original metallic luster of black malleable cast iron, presenting a unique metallic texture, which is very suitable for handicrafts.
2. It is widely used and can carry out surface treatment by itself. After purchasing the black malleable pipe fittings, you can also spray them with different colors of paint, which is suitable for different application scenarios. On the one hand, it also has better anti-rust ability.
3. Low price. Black galvanized pipe fittings are also less expensive because the step of galvanizing is omitted.
Black malleable fittings are manufactured from malleable cast iron.
Malleable cast iron, cast iron made by casting molten iron with a certain chemical composition into a white blank, and then annealed, has high strength, plasticity and impact toughness, and can partially replace carbon steel. The grade of malleable cast iron is indicated by the percentage of minimum tensile strength (MPa) and minimum elongation after fracture followed by "KTH" (the prefix of Chinese pinyin of black heart malleable cast iron) or "KTZ" (the prefix of Chinese pinyin of pearlitic malleable cast iron). For example, the grade KTH 350-10 means black-heart malleable cast iron with a minimum tensile strength of 350 MPa and a minimum elongation after break of 10%, that is, ferritic malleable cast iron; KTZ 650-02 means a minimum tensile strength of 650 MPa and a minimum elongation after break. Pearlitic malleable cast iron with a rate of 2%. The material used for the Jianzhi brand equal-diameter cross in the picture below is the black-heart malleable cast iron with the grade KTH 350-10.
1. Good quality
a. The heaviest quality
Compared with the national standard products, Jianzhi products are the heaviest in quality, obviously heavier than the national standard products of the same specification from any domestic manufacturer.
b. The most beautiful appearance
Due to years of experience in molding and casting and leading technical advantages, the smoothness of the appearance of Jianzhi products is the best in China, and the galvanized surface is smooth and flat. Due to the fine and dense molding sand, there are no large sunken sand hole residue marks on the surface.
c. The most precise thread
As mentioned in the threading process above, the pipe thread standard for construction is the most stringent in the industry, and the length and precision of the pipe thread strictly follow the national standard. The installation is simple and trouble-free, and the sealing performance is good.
d. Pay the highest
Due to our excellent quality control, we proposed the only highest compensation standard in the same industry in China, 1,618 yuan for a gray part, 500 yuan for a through-hole part, and 200 yuan for a substandard product.
2.The malleable pipe fittings industry has the most complete products Product categories, the most complete specificationsIn the field of malleable steel pipe fittings, Jianzhi has the most complete product varieties and specifications. At the same time, we have good cooperative relations with many brother factories that produce stainless steel pipe to wire and valves, which can fully meet the needs of customers for one-stop procurement.
3. Sufficient production capacity and stable supply
The production capacity of Jianzhi Group has reached an annual production capacity of 400,000 tons, and it is the only domestic enterprise that can still produce at full capacity without being affected by the national environmental protection policy. Therefore, the products of Jianzhi Group can provide customers with a guaranteed production cycle and delivery cycle, so that customers can avoid the pain of shortage.
black malleable pipe fittings standard
The grade of malleable cast iron is composed of "KTH" (the initial of the three-character Chinese pinyin of "Ke Tiehei") or "KTZ" (the initial of the three-character Chinese pinyin of "Ke Tiezhu") followed by the minimum tensile strength value (MPa) and the minimum Expressed as a percentage of elongation after break. For example, the grade KTH 350-10 means black-heart malleable cast iron with a minimum tensile strength of 350 MPa and a minimum elongation after break of 10%, that is, ferritic malleable cast iron; KTZ 650-02 means a minimum tensile strength of 650 MPa and a minimum elongation after break. Pearlitic malleable cast iron with a rate of 2%.
The national standard for malleable iron pipe fittings in China is GB/T3287-2011, and the material standard for malleable iron is GB/T9440-2010. Jianzhi Group is the main drafting unit of these two standards and has played a key role in the revision of the standards.
Black heart malleable cast iron is divided into several grades such as KTH300-06, KTH330-08 and KTH350-10.
Jianzhi Group uses KTH-330-08 malleable cast iron as the material. Compared with KTH300-06 required by the national standard, the tensile strength is 10% higher and the elongation is 33% higher than the standard.
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Tel: +86 022 8848 8866
Office In Tianjin:
Heping District, Tianjin, China.
Production Base 1:
Chifeng, Inner Mongolia, China.
Production Base 2:
Tangshan City, Hebei Province, China.
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