Hebei Jimeng Highstrength Flange-tubes Group Co.,Ltd. is mainly produce all standard Q235 flange.
1) ANSI B16.5, ASME B16.47 FLANGE
10K Sop Flange, Standard Flange JIS 10K, JIS 10K Flange Hebei Jimeng Highstrength Flange-tubes Group Co.,Ltd. , https://www.jimengflange.com
At the beginning of the 20th century, Gans pointed out that it is possible to extract gold from dilute solutions and seawater using ion exchange resins. In 1945, FC Nahold first proposed a method for adsorbing gold by ion exchange resin in the US patent. In 1949, British Company do Holm Birgit Heyou Si weakly basic anion exchange resin IR-4B extracting silver and gold from alkaline cyanide solution tests succeed, the recovery of gold and silver, respectively, 95.4% and 79 %. In the 1950s, under the leadership of HH Palaxin, a member of the former Soviet Academy of Sciences, the research group of the Kalinin Nonferrous Metals and Gold Institute in Moscow began to study and make significant contributions to the resin pulping process. Later, led by the academician of the Academy of Sciences, bH Laskerin, this research work, due to the joint efforts of the researchers, tested a number of synthetic ion exchange resins, studied the regularity of the adsorption process, and explored the method of resin desorption and regeneration. . In 1967, the first large-scale ion exchange industrial test device of the former Soviet Union was built (the ore treatment capacity was 200t/d). After three years of experiments, it was proved that the ion exchange adsorption method can effectively recover gold from clay ore. In 1973, another cyanide and adsorption leaching gold plant for the treatment of carbonaceous gold concentrates was put into operation in the Soviet Union. A few years later, the adsorption plant for processing gold and silver ore was put into operation. Between 1975 and 1980, there were three resins in the former Soviet Union. The gold plant has been put into production successively, the largest of which is the Mulongtao gold mine with an annual output of 80t of gold.
The most important problems in the adsorption of gold from the pulp by ion exchange resin are: 1 synthesis of resin with good selectivity to gold, high adsorption capacity, high mechanical strength and good chemical stability; 2 formulate a reasonable desorption process for gold-loaded resin, It can ensure the complete desorption of gold, and can remove a large amount of ruthenium metal impurities adsorbed by it, and restore the initial adsorption capacity of the resin, so that the resin can be recycled to the cycle multiple times; 3 has a large processing capacity and is suitable for resin from concentrated pulp. A device that adsorbs gold (silver).
The adsorption and recovery of gold from the cyanide solution by the ion exchange resin is not as economical as the zinc replacement method, but the resin slurry method and the carbon slurry method do not require the solid-liquid separation of the slurry, the washing, the clarification of the solution, the degassing, and the like, and The toughness of the resin is greater than that of activated carbon, which can shorten the cyanide time, increase the adsorption recovery rate of gold in the slurry, and reduce the loss of the gold-loaded fine resin in the tailings. However, although the adsorption capacity of the ion exchange resin is larger than that of activated carbon, the selectivity to gold and silver is much lower than that of activated carbon. The large amount of base metal impurities loaded in the gold-loaded resin complicates the desorption process, prolongs the production cycle, increases the production cost, and causes the resin slurry method to have much higher equipment investment and production cost than the carbon slurry method. This is subject to further research and improvement.
In China, the Changchun Gold Research Institute, the Beijing Institute of Chemical Metallurgy of the Ministry of Nuclear Industry, the Jilin Province Metallurgical Research Institute and other scientific research units have carried out research on the resin pulping process, and have achieved gratifying results.
Design: welding neck, slip on, blind, socket welding, threaded, lap-joint
Pressure: 150#, 300#, 600#,900#,1500#, 2500#
Wall thickness for Welding Neck Flange: STD, SCH40, SCH80, SCH160. SCHXXS
Material: carbon steel A105, stainless steel 304/304L, 316/316L
Coating: black paint, yellow transparent paint, cold and hot dip galvanize
Package: seaworthy plywooden case, wooden pallet
2) EN1092-1 FLANGE
Size range: DN15 to DN2000
Design: type01 plate flange, type02 loose flange, type05 blind flange, type11 welding necking
type12 slip on flange, type 13 threaded flange
Pressure: PN6, PN10, PN16, PN25, PN40, PN64, PN100
Material: carbon steel C22.8, S235, S235JR, P235GH, stainless steel: 304/304L, 316/316L
Coating: black paint, yellow transparent paint, cold and hot dip galvanize
Package: sea worthy plywooden case, wooden pallet
3) DIN Flange
Size range: DN15 to DN2000
Design: slip on flange DIN2573,2576,2502,2503, 2543,2545
welding neck falnge DIN2631, 2632,2633,2634,2635
blind flange DIN 2527 PN6, PN10, PN16, PN25, PN40
threaded falnge DIN2565,2566,2567,2567
loose flange DIN 2641,2642,2656,2673
4) GOST Flange
Size range: DN15 to DN 2000
Design : plate falnge 12820-80, welding neck flange 12821-80
Pressure: PN6, PN10, PN16, PN25, PN40
Material: carbon steel CT-20, stainless steel 304/304L, 316/316L
Coating: rust-proof oil, cold and hot galvanize
Package: sea worthy plywooden case, wooden pallet
5) JIS B2220 FALNGE
Size ragne : 15A to 2000A
Design: SOP, BIND, SOH,
Puressure: 1K, 2K, 5K, 10K, 16K, 20K, 30K, 40K
Material: carbon steel SS400, stainless steel SUS304, SUS316
Coating : rust-proof oil, cold and hot galvanize 
A brief introduction of gold and silver by resin method
A method of adsorbing gold from a cyanide slurry using an ion exchange resin as an adsorbent is called a resin slurry method (RIP). Like the carbon slurry method (CIP), it belongs to the non-filtering gold extraction technology, and directly adds the ion exchange resin to the cyanide pulp to adsorb gold. Therefore, it has a series of advantages of no filtration and gold extraction technology.
Size range: 1/2" to 80" DN15 to DN2000