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Table 3 – Example of construction types and welded connections

AD 2000 S1

Table 3 – Example of construction types and welded connections

Table 3. Examples of construction types and welded connections with the corresponding classes (K 0, K 1, K 2, K 3) and the corresponding stress factor h (depicted rupture paths exemplary)
No.	Figure	Description	Provision	Class	h
1. Cylindrical and conical shells, dished ends
1.1		Longitudinal or circumferential weld with equal wall thicknesses	Welded on both sides	K 1	3,0¹⁾
1.2			Welded on one side with counter weld	K 1
1.3			Welded on one side without counter weld	K 2
1.4	$S1_3\Image216.gif$	Longitudinal or circumferential weld with unequal wall thicknesses	Welded on both sides	K 1	1,5²⁾
1.5				K 1
1.6				K 1
1.7			Welded on both sides, Same offset of edges inside and outside	K 1
1.8				K 1
1.9				K 1
1.10		Cone with corner joint	Welded on both sides or welded on one side with counter weld	K 1	2,7
1.11			Welded on one side without counter weld	K 3
1.12		Cone with knuckle and longitudinal weld	Seam and class assignment as No 1.1-1.3	K 1 / K2	2,0
1.13		Head to shell joint for dished ends with cylindrical skirt heights acc. to AD-Merkblatt B 3	Seam and class assignment as No 1. 1 -1.9	K 1	1,5
1.14		Knuckle of Klöpper type	Not welded	K 0	2,5
1.15		Knuckle of Korbbogen type	Not welded	K 0	2,0

Table 3. Examples of construction types and welded connections wit the corresponding classes (K 0, K 1, K 2, K 3) and the corresponding stress factor h (depicted rupture paths exemplary)
No.	Figure	Description	Provision	Class	h
2. Nozzle welds
2.1		Set-through or set-in nozzle	Welded on both sides or welded on one side with counter weld	K 1	3,0
2.2			Welded on one side without counter weld	K 2
2.3		Set-through nozzle (left type in the figure)	Welded on both sides but not continuously welded	K 2
2.4		Set-in nozzle (right type in the figure)		K 3
2.5		Set-on nozzle	Welded on one side (no remaining gap), Nozzle drilled or weld root polished	K 1
2.6			Welded on one side without counter weld or without mechanical processing of the root.	K 2
2.7		Nozzle with disk type reinforcement. Seam: at outside diameter of the disk		K 3
2.8		Nozzle with disk type reinforcement. Seam: Nozzle weld	Joint of nozzle pipe with shell and reinforcement disk welded	K 1

Table 3. Examples of construction types and welded connections wit the corresponding classes (K 0, K 1, K 2, K 3) and the corresponding stress factor h (depicted rupture paths exemplary)
No.	Figure	Description	Provision	Class	h
3. Flanges, block flanges and bolts
3.1		Welding neck flange	Welded on both sides or welded on one side with counter weld	K 1	2,0
3.2			Welded on one side without counter weld	K 2
3.3		Slip-on weld flange	Weld according to AD-Merkblatt B 8, Table 1	K 2	3,0
3.4		Set-in block flange	Welded on both sides or welded on one side with counter weld	K 1
3.5			Welded on both sides but not continuously welded	K 2
3.6		Set-in block flange with welding hub	Welded on both sides or welded on one side with counter weld	Kl
3.7		Set-on block flange. Weld at inside diameter (left weld in the figure)		K 3	4,0
3.7		Set-on block flange. Weld at outside diameter (right weld in the figure)		K 2
3.8		Bolts of flanged connections: As a rule a proof is only required, if the bolts are loosened frequently. In this cases the values in brackets K 0 und h = 5,0 are valid		(K 0)	(5,0)

Table 3. Examples of construction types and welded connections wit the corresponding classes (K 0, K 1, K 2, K 3) and the corresponding stress factor h (depicted rupture paths exemplary)
No.	Figure	Description	Provision	Class	h
4. Bolted, attached or clamped flat plates with openings Range of validity and supplementary notes: - Stress factors h are valid for ends with central openings if the following conditions for the opening are fulfilled: (Terms s. AD-Merkblatt B 5 and B 9): d_i / D₁ £ 0,2 and s_s / s ³ 1,25 × d_i / D₁ + 0,1 for reinforced openings and d_i / D₁ £ 0,2 for unreinforced openings - reinforced openings weld and class assignment as numbers 2.1-2.6, 3.3-3.7 - unreinforced openings (flat plates without weld): Class K 0
4.1	$S1_3\Image236.gif$	Bolted plates with and without peripheral momenmt	s. " Range of validity and supplementary notes " for No. 4	K0-K3	3,0
4.2	$S1_3\Image237.gif$	Plate attached from the internal or external side
4.3	$S1_3\Image238.gif$	Simply supported flat plate

Table 3. Examples of construction types and welded connections wit the corresponding classes (K 0, K 1, K 2, K 3) and the corresponding stress factor h (depicted rupture paths exemplary)
No.	Figure	Description	Provision	Class	h
5. Joint weld of flat ends Range of validity and supplementary notes: Classes K and stress factors h are also valid for ends with central openings if the following conditions for the opening are fulfilled: (Terms s. AD-Merkblatt B 5 and B 9):: d_i / D₁ £ 0,2 and s_s / s ³ 1,25 × d_i / D₁ + 0,1 for reinforced openings and d_i / D₁ £ 0,2 for unreinforced openings
5.1	$S1_3\Image239.gif$	Welded end	Welded on both sides	K1	5,0
5.2	$S1_3\Image240.gif$		Welded on both sides but not continuously welded	K2
5.3	$S1_3\Image241.gif$		Welded on one side without counter weld	K3
5.4	$S1_3\Image242.gif$	Welded end with relief groove	Welded on one side, Groove dimensions acc. to AD-Merkblatt B 5, Table 1, Type 6	K2	4,0
5.5	$S1_3\Image243.gif$	End welded to a welding neck flange or slip-on flange	Welded on both sides with fillet welds	K2	5,0
5.6	$S1_3\Image244.gif$	Welded end	Welded on both sides or welded on one side with counter weld	K1
5.7	$S1_3\Image245.gif$		Welded on both sides but not continuously welded	K2
5.8	$S1_3\Image246.gif$		Welded on one side	K3
5.9		Partially welded end	Welded on one side	K3	5,0
5.10	$S1_3\Image247.gif$	End with knuckle Joint weld	Knuckle radius and skirt height acc. AD-Merkblatt B 5,Table 1, type a, Weld and class assignment as number 1.1-1.3	Kl/K2	1,5
5.11	$S1_3\Image247.gif$	End with knuckle, Knuckle	Not welded	K0	2,0
5.12	$S1_3\Image248.gif$	Forged or pressed end Joint weld	Knuckle radius and skirt height acc. AD-Merkblatt B 5,Table 1, type b, Weld and class assignment as number 1.1-1.3	K1/K2	1,5
5.13	$S1_3\Image248.gif$	Forged or pressed end, Knuckle	Not welded	K0	4,0

Table 3. Examples of construction types and welded connections wit the corresponding classes (K 0, K 1, K 2, K 3) and the corresponding stress factor h (depicted rupture paths exemplary)
No.	Figure	Description	Provision	Class	h
6. Jacket – Joint welds
6.1	$S1_3\Image249.gif$	With integrated knuckle: The evaluation is valid for the inner vessel and for the joint weld	Welded on one side	K 2	3,0
6.2	$S1_3\Image250.gif$	With separate knuckle: The evaluation is valid for the inner vessel wall and for the joint weld of knuckle and inner vessel wall. ( The joint weld of knuckle and outer vessel wall is classified as number 1.3 with K 2)	Welded on both sides or welded on one side with counter weld	K 1	3,0

Table 3. Examples of construction types and welded connections wit the corresponding classes (K 0, K 1, K 2, K 3) and the corresponding stress factor h (depicted rupture paths exemplary)
No.	Figure		Description	Provision	Class	h
7. Welded attachments, general Provision: External appearance of the welds acc. EN 25817, classification group B, excluding the characteristics weld reinforcement, lower deviation of the weld and being non-isosceles
7.1		$S1_3\Image251.gif$	Welded attachments without transmitting changing tensile forces and moments 7 The evaluation refers to rib center. For the rib end, the classification is one class worse each.	Welded on both sides	K1	2,0
7.2		$S1_3\Image251.gif$		Welded on both sides with filet weld	K2
7.3		$S1_3\Image252.gif$		Welded on both sides	K1⁷
7.4		$S1_3\Image252.gif$		Welded on both sides with filet weld	K2⁷
7.5		$S1_3\Image253.gif$	Reinforcement plate, filler plate with fillet weld joint. No transmitting of changing tensile forces and moments	s₂ £ 1,5 · s₁ r ³ 2 · s₂	K2
7.6		$S1_3\Image254.gif$	Welded attachments with transmitting changing tensile forces and moments	Welded on both sides	K1	3,0
7.7		$S1_3\Image254.gif$		Welded on both sides but not continuously welded	K2	3,0

Table 3. Examples of construction types and welded connections wit the corresponding classes (K 0, K 1, K 2, K 3) and the corresponding stress factor h (depicted rupture paths exemplary)
No.	Figure	Description	Provision	Class	h
8. Welded attachments without transmitting of changing tensile forces or moments, examples Provision: External appearance of the welds acc. EN 25817, classification group B, excluding the characteristics weld reinforcement, lower deviation of the weld and being non-isosceles
8.1	$S1_3\Image255.gif$	Vessel with skirt support	Welded on one side	K2	2,0
8.2	$S1_3\Image256.gif$	Vessel wall with ring support	Welded on both sides but not continuously welded	K2	2,0
8.3		Vessel wall with ring stiffener	Welded on both sides but not continuously welded	K2
8.4		Vessel wall with ring stiffener	Welded in circumferential direction but not continously welded	K3
8.5	$S1_3\Image257.gif$	Vessel wall with support bracket (with or without reinforcement)	Welded on one side	K2
8.6	$S1_3\Image258.gif$	Vessel wall with leg support (with or without reinforcement)	Welded on one side	K2
8.7	$S1_3\Image259.gif$	Vessel wall with trunnion (with or without reinforcement)	Welded on one side	K2
8.8	$S1_3\Image260.gif$	Vessel wall with lifting lug (with or without reinforcement)	Welded on one side	K2
8.9	$S1_3\Image261.gif$	Vessel wall with lifting lug (with or without reinforcement)	Welded on one side	K2