ASME ellipsoidal heads ( also called ASME ellipsoidal head or tank heads ) is kind of dished head used for vessel, like boilers, storage tank, heat exchanger etc. The ASME ellipsoidal heads is the economical solution for medium pressure tanks due to the reduced metal thickness requirement.
We received an ASME ellipsoidal heads inquiry from Malaysia in April, after many technical confirmations, the customer placed the order. ASME ellipsoidal heads were delivered to Klang Port at the end of October,arrived in middle November. The ASME ellipsoidal heads are used by Shell in the project in Malaysia.
Specifications of ASME Ellipsoidal Heads
Inner diameter: 2000 mm
Thickness: 78+3 mm
Straight flange: 75 mm
Material: SA 516 GR 70 N+SS 316 L ( it is kind of cladding material )
Quantity: 2 pcs
Inner diameter: 3450 mm
Thickness: 137+3 mm
Straight flange: 75 mm
Material: SA 516 GR 70 N+SS 316 L (it is kind of cladding material)
Quantity: 2 pcs
Design code: ASME Standard with U-part stamp and Manufacturer Data Report.
Technical request: NACE MR0 175/ISO15156
The Production Process of ASME Ellipsoidal Heads
① Steel Plate Into the Factory
② Material Inspection ( material transplantation, code marking )
③ Lineation and Blanking ( flame cutting )
④ Welding the ASME ellipsoidal head welding method is submerged arc automatic welding, it’s inherent welding quality is stable, welding productivity is high, no arc and smoke are few, making it the main welding method in the production of important steel structures such as pressure vessels, pipe segments, box beams and columns. Welding stick is H 08 Mn 2 M0A,soldering flux is SJ 102.
⑤ Pressing the ASME ellipsoidal head is hot stamping. According to the hot stamping process, the round billet is heated, the temperature is 930℃±10℃, the holding time is 140-170 min; begin to pressing after coming out of heating furnace, the terminal pressure temperature is greater than 840℃, after forming, it is slowly cool to normal temperature.
⑥ Check the dimensions of the ASME ellipsoidal head according to the standard requirements, like convex,concave, ovality, outer perimeter, thickness, etc.
⑦ NDT inspection, there are four types. 100% Rt inspection of the ASME ellipsoidal heads welding joint, check whether there are excessive defects inside the welding joint; 100% MT inspection of the outer surface welding joint of the tank heads, detect if there is a surface defect; PT inspection of the inner cladding material of the ASME ellipsoidal heads, detect if there is a surface defect; 100% UT inspection of the bond quality of the cladding material after forming of ASME ellipsoidal heads, check if the bonding rate meets the requirements.
⑧ Machining the end groove according to the dimensions of drawings.
⑨ Surface treatment,sandblasting of external carbon steel of the ASME ellipsoidal heads,pickling and passivation of internal stainless steel of the ASME ellipsoidal heads.
⑩ Final inspection of the ASME ellipsoidal heads, U-part stamp.
⑪ Packaging and Delivery.
About STRENGTH Equipments
Taian STRENGTH Equipments Co., Ltd is the professional pressure vessel designer, manufacturer and exporter dedicated in supplying finest quality industrial autoclave, storage tank and dish head products and solutions to worldwide customer over 20 years. We have over 80 talented research and development experts, 2 million square meters manufacturing factory and more than 50 sets large-scale manufacturing machines. Our annual industrial autoclave and storage tank output can reach over 300 sets, dished head output can reach over 3000 sets.
STRENGTH equipments is not only manufacturing high quality industrial autoclaves,storage tanks and dished ends but also providing custom product design, fabrication and after-sale service. ODM, OEM are also available. If you have any questions or inquiries, please fill and submit the following form,we will reply as soon as possible.