We aspire to become the largest, most professional, most authoritative tube sheet fabrication base in China, we have a “one-stop” complete process from the material to cutting and discharging, bevel forming, welding, machining, our tube sheet products are widely used in pressure heat exchangers, nuclear power, petrochemical, coal chemical, hydropower, thermal power, energy, machinery manufacturing and other industries.
At present, the maximum processing diameter of our tube sheet processing is up to 10 meters, the maximum drilling depth is 1.1 meters (the maximum diameter of the market is usually about 7 meters, the thickest 500mm or so), and we support the processing of carbon steel, stainless steel, zirconium, copper-coated, nickel-based alloys, titanium, and other various materials. Example of past processing tube sheet:
Extreme machining up to 11.9 meters in diameter
Large diameter forging tube sheet vertical machining
Maximum diameter 8720mm, ultra-thick tube sheet 730mm
At present, Heavy Precision Workshop has 11 sets of large deep hole drilling and 31 sets of CNC plane drilling and a series of domestic and foreign supporting advanced equipments with high precision, full specifications and multiple functions, which can provide machining services such as turning, milling, boring and drilling.
Korea Dayang multi-hole drilling equipment, maximum processing tube sheet diameter 10 meters
Italian Innse-Berardi deep hole drill, the maximum drilling depth of 1.1 meters
ESAB Surface Welding Equipment
Multi-hole drilling equipment group
Multi-specification tube hole machining capability
Through a series of mature technology combinations such as strip pole stack welding, multi-block stack drilling, stack boring, anti-vibration tooling, inclined angle drilling, etc., we are able to provide technical support for irregular holes such as jewellery holes, toothed holes, rhombic holes and elliptical holes in addition to the common round holes, so that we can satisfy the diversified needs of our customers and realise the tailor-made service of our customer’s tube sheet products.
Case Review:
1. Successfully developed Toshiba tube sheet supporting processing project with Japan HANWA, involving incoming material inspection, cutting and discharging, surface surfacing of tube plate, flaw detection, heat treatment, sand blasting, drilling, quality inspection and packaging and shipping, etc., which requires aperture diameter of ±0.05mm, surfacing thickness of ±0.2mm, and processing thickness of 600mm, which are much higher than the requirements of similar domestic products in terms of machining accuracy.
2. Solve the difficult machining of titanium alloy tube sheet, this titanium alloy material has very high tensile strength, which is twice as much as the normal titanium material, and its machining involves vertical lathe, small gantry, deep-hole drilling, and clamping process.
3. For a power station equipment manufacturer processing of tube sheet components, the processing of the product for four large tube sheet, using 317L and carbon steel composite steel plate, are “trapezoidal”, the long side of the length of 2250mm, the short side of the length of 2860mm, the height of 5120mm, thickness of 38.5mm, the whole version of the drilling more than 5,600 holes.
4.Forging stainless steel large diameter, ultra-thick tube sheet processing
The tube sheet diameter ø3996mm, processing thickness 535mm, pipe hole ø22mm, material S30408/S30408 VI forging stainless steel.
5. Evaporator tube sheet, folding plate, liquid rehydration plate, etc. for an international first-class pulp and paper equipment supplier.
The material is medium-thick plate of TISCO, and the process involves cutting, edge planing, welding, flaw detection, shaping, turning, drilling and boring, chamfering, packaging and so on. Difficulties: Because of the special thickness of the plate, it is easy to be deformed by vertical lathe machining, and frequent tool change is required.
