Torispherical heads

Type A
⌀ 600–4200 mm

We manufacture torispherical heads Type A to agreed drawings with reference to GOST 34347-2017; strength calculations use GOST 34233.2-2017. The spherical crown joins the cylindrical straight flange through a knuckle. Crown and knuckle radii are agreed together to define the profile and shell connection.

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Head dimensions and profile to GOST 34233.2-2017

Manufactured to GOST 34347-2017

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About the company

Type A torispherical heads are used in pressure vessels, oil and gas and chemical equipment, separators and receivers. Manufacturing since 2004; applicable documentation includes GOST 34233.2-2017 and 34347-2017. Diameter range 600–4200 mm; the size cards confirm the applicable thickness combinations. The source category lists 3–22 mm, subject to the selected profile and drawing.

Director of Germes-Ural LLC
Roman Borisovich Gostyukhin

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Head dimensions
Type A

D = 600–4200 mm
s = 3–22 mm; as specified
R = 1D
r = 0,1D

All sizes Type A

Torispherical head Type A — profile diagram

Typical dimensions of torispherical heads Type A

D, mm	s, mm	R, mm	r, mm	h1 and h2
600	6–22	600	60	According to the drawing
700	6–22	700	70	According to the drawing
800	6–22	800	80	According to the drawing
900	6–22	900	90	According to the drawing
1000	6–22	1000	100	According to the drawing
1100	6–22	1100	110	According to the drawing
1200	6–22	1200	120	According to the drawing
1300	6–22	1300	130	According to the drawing
1400	6–22	1400	140	According to the drawing
1500	6–22	1500	150	According to the drawing
1600	6–22	1600	160	According to the drawing
1700	6–22	1700	170	According to the drawing
1800	6–22	1800	180	According to the drawing
1900	6–22	1900	190	According to the drawing
2000	6–22	2000	200	According to the drawing
2100	6–22	2100	210	According to the drawing
2200	6–22	2200	220	According to the drawing
2300	6–22	2300	230	According to the drawing
2400	6–22	2400	240	According to the drawing
2500	6–22	2500	250	According to the drawing
2600	6–22	2600	260	According to the drawing
2700	6–22	2700	270	According to the drawing
2800	6–22	2800	280	According to the drawing
2900	6–22	2900	290	According to the drawing
3000	6–22	3000	300	According to the drawing
3100	6–22	3100	310	According to the drawing
3200	6–22	3200	320	According to the drawing
3300	6–22	3300	330	According to the drawing
3400	6–22	3400	340	According to the drawing
3500	6–22	3500	350	According to the drawing
3600	6–22	3600	360	According to the drawing
3700	6–22	3700	370	According to the drawing
3800	6–22	3800	380	According to the drawing
3900	6–22	3900	390	According to the drawing
4000	6–22	4000	400	According to the drawing
4100	6–22	4100	410	According to the drawing
4200	6–22	4200	420	According to the drawing

The size cards list thicknesses of 6–22 mm. The final configuration is agreed for the project. Radii refer to the company’s catalogue profile; heights and tolerances are specified in the drawing.

Selection and manufacturing of Type A

When forming Type A, checks cover the smooth transition from the crown to the knuckle. The straight flange and edge are prepared for the agreed welded joint. The drawing coordinates these operations with the actual blank thickness and material.

The finished Type A profile is checked for mating diameter, ovality, radii and the transition zone. For a welded blank, weld and inspection requirements are specified in the documentation. Allowable pressure is established by calculation, not by the Type A designation.

Materials

Carbon steels

20YuCh, 09G2S, St3sp5, St20, 17G1S

Aluminium alloys

AMg3, AMg5, AMg61 (1561), R-1407

Stainless steels

08(12)Kh18N10T, 10Kh17N13M2T, AISI 321, AISI 304, AISI 316Ti and Other

Titanium alloys

VT1-0, VT5, VT6, VT8, VT9, OT4-O

Applications of torispherical heads Type A

When designing tanks and vessels Type A is checked for the loads, material and equipment layout. Compare the radii with the vessel drawing and specify the finished component thickness.