Yixing Tongda Head Co., Ltd. is specialized in producing steel pressure vessels and its related products. Our company has the advanced production equipment and testing equipment. We can produce quality sealing heads with the diameters from 56mm to 6500mm and thicknesses from 2mm to 150mm. Our company has well-trained production and sales teams and excellent technology. Our company has formed into a large-scale backbone enterprise in the field. Our company has obtained national A3 sealing head manufacturing license. We have a complete quality guarantee system and large sealing head production...