Flat heads, also known as a flat-bottomed flat head, with a flat bottom and a slightly folded edge. It can be divided into shape: flat bottom punching head, flat bottom tube sheet head, folded flat head.
Precision is a menufacture of customized flat heads with a large range of knuckle radius. The flat heads are manufactured from Precision’s stainless steel plate stock in order to master of quality and deadlines.
Common standard for flat-bottomed heads：
Commonly used standards: JB/T4746-2002, JB/T1619-2002, GB16749-1997
Inspection standard: JB/T4746-2002 JB4730-94
Housing material: carbon steel, stainless steel, alloy steel
Flat head for medium: gas, liquid, steam
Common usages of flat heads：
Flat seal application range: petroleum, electronics, chemical, pharmaceutical, textile, food, machinery, construction, nuclear power, aerospace, military and other industries.
Technical requirements for the customized flat heads:
1. The splicing press of the flat-bottomed head is strictly in accordance with JB/T4746-2002. The inspection shall be carried out in accordance with JB/T5000.98.3 General Technical Conditions for Welded Parts.
2. The physical and chemical properties of the incoming material are inspected before the flat-bottomed head is pressed, and the ultrasonic inspection is used to detect the re-inspection. The quality level is definitely not lower than the second grade.
3. Ultrasonic flaw detection is carried out 24 hours after the flat bottom joint splicing weld, and the quality level reaches 2nd level and then pressed. After the annealing is completed, the weld is subjected to ultrasonic and magnetic particle inspection, and the quality level is not lower than two.
4, the geometric dimensions of the flat bottom head:
Ellipticity <=10mm (before the upper machine machining)
Weld seam misalignment <=2mm
The surface of the weld must not be lower than the surface of the base metal
5, The upper part of the flat-bottomed head and the groove must be machined, and the processing is performed after annealing. The ovality after processing is not more than 5mm, and the head pressing control is thinned, and the minimum thickness is not less than 66mm.
Shandong Precision Metal Products Co.,Ltd ‘main products include: spherical shell, Ellipsoidal head, dish end, flat bottom, ball head, expansion joint, corrugated furnace and other non-standard parts. In addition, in order to meet the urgent needs of customers, our company has a variety of standard stocks in stock throughout the year. Our products are sold to more than 20 provinces and regions across the country. Of course, they are also very popular overseas.
Our customers come from a wide range of sectors: petrochemical, chemical, pharmaceutical, cosmetic, agri-food, logistics, transportation, tanks, water treatment, environmental, industrial boilers, heat exchangers, etc.