GB/T 30092-2013 English PDF (GBT30092-2013)

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GB/T 30092-2013: Metal bellows compensator used in high voltage combined electrical appliance
GB/T 30092-2013
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.130.10
K 43
Metal bellows compensator used in high voltage combined
electrical appliance
ISSUED ON: DECEMBER 17, 2013
IMPLEMENTED ON: MAY 01, 2014
Issued by: General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Terms and definitions ... 5
4 Product classification ... 7
5 Requirements ... 14
6 Test methods ... 21
7 Inspection rules ... 31
8 Marking, packaging and storage ... 34
Metal bellows compensator used in high voltage combined
electrical appliance
1 Scope
This Standard specifies the product classification, requirements, test methods,
inspection rules, as well as marking, packaging and storage of metal bellows
compensator used in high voltage combined electrical appliance (hereinafter referred to
as compensator).
This Standard applies to metal bellows compensator used in high voltage combined
electrical appliance.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 1173, Casting aluminium alloy
GB/T 1222, Spring steels
GB/T 1958-2004, Geometrical product specifications (GPS) - Geometrical tolerance
- Verification prescription
GB/T 1972-2005, Disc spring
GB/T 2829-2002, Sampling procedures and tables for periodic inspection by
attributes (apply to inspection of process stability)
GB/T 3274, Hot-rolled plates, sheets and strips of carbon structural steels and high
strength low alloy structural steels
GB/T 3280, Cold rolled stainless steel plate, sheet and strip
GB/T 4237, Hot rolled stainless steel plate, sheet and strip
GB 7674-2008, Gas-insulated metal-enclosed switchgear for rated voltages of 72.5
kV and above
GB/T 8163, Seamless steel tubes for liquid service
5.4.3.1 When the bellows tubular blank is rolled with steel plate, the bellows body shall
not have circumferential welded joints. If the nominal diameter is less than or equal to
600 mm, only one longitudinal welded joint is allowed; if the nominal diameter is
greater than 600 mm, two longitudinal welded joints are allowed. The distance between
two welded joints shall be greater than 250 mm. The surface of the joint shall be free
of cracks, air holes, undercuts and misalignment. When the wall thickness of the tubular
blank is less than or equal to 1 mm, the defect grade of the welded joint in the dyeing
penetrant testing shall not be lower than grade I specified in 7.2 of JB/T 4730.5-2005.
When the wall thickness of the tubular blank is greater than 1 mm and less than 2 mm,
the defect grade of the welded joint in the radiographic testing shall be the qualified
grade specified in Appendix B of GB 16749-1997. When it is greater than or equal to 2
mm, the defect grade of the welded joint in the radiographic testing shall not be lower
than grade I specified in 5.1 of JB/T 4730.2-2005.
5.4.3.2 When the bellows is multi-layered, the positions of the longitudinal welded
joints between the tubular blanks of each layer shall be evenly staggered along the
circumferential direction when the tubular blanks are fitted together. There shall be no
water, oil, dirt and other impurities between the layers of the multi-layer bellows. The
port of the straight section of the multi-layer bellows shall be welded by fusion welding,
such as argon arc welding or resistance seam welding, so that the layers of the port are
fused as a whole.
5.4.3.3 For the welded joints of steel plate coiled pipes, the surface of the welded joints
between bellows and pipes, between bellows and flanges, and between pipes and
flanges shall be free of cracks, pores and arc craters. The welded joints of the connecting
pipe under pressure shall be subjected to partial radiographic testing, and the detection
length shall not be less than 20% of the length of each welded joint, and shall not be
less than 250 mm. The defect grade of the welded joint in the radiographic testing shall
not be lower than grade II specified in 5.1 of JB/T 4730.2-2005. The defect grade of the
dyeing penetrant testing of the circumferential welded joints between bellows and
connecting pipes, bellows and flanges, and connecting pipes and flanges shall not be
lower than grade I specified in 7.2 of JB/T 4730.5-2005.
5.4.3.4 There shall be no cracks, air holes or arc craters on the surface of the welded
joints between the connecting pipe and accessories such as stiffener plates and support
blocks.
5.4.4 Punch riveting and riveting force
The connection between the inner protective sleeve of the van stoned bellows
compensator and the bellows, as well as the cast aluminum flange shall adopt the punch
riveting technology, and the size of the riveting force shall ensure that the inner
protective sleeve does not loosen after riveting, and the cast aluminum flange shall not
burst.
5.5 Appearance
5.5.1 On the inner and outer surfaces of the bellows, there shall be no visually visible
defects such as sharp indentations, imprints, scratches, cracks, etc. that can obviously
cause stress concentration and affect the strength and service life, and there shall be no
scratches greater than the negative deviation of single-layer wall thickness. Except for
minor mold indentations.
5.5.2 The appearance shape of the bellows shall be free of visible defects such as non-
perpendicularity between the axis and the ring plane of the bellows, uneven wave
distance, and skewed corrugation.
5.5.3 The inner and outer surfaces of the bellows shall be free from visible rust spots
and scales.
5.5.4 The inner and outer surfaces of the bellows shall be free from visually visible
defects such as large water vestiges and uneven colors.
5.5.5 The longitudinal welded joint at the flange of the van stoned bellows shall be
trimmed and smooth.
5.5.6 The outer surface of the welded joint of the compensator shall be trimmed and
smooth and shall be free from burrs or sharp corners.
5.5.7 The inner surface of the compensator shall be smoothly transitioned, and the
welded joint shall be trimmed into a smooth curved surface.
5.5.8 There shall be no damage to the flange sealing surface, and the roughness of the
flange sealing surface, inner surface and outer surface shall meet the requirements of
the design drawings.
5.5.9 There shall be no welding slag and spatter on the surface of each part of the
compensator.
5.6 Painting
5.6.1 The painting environment shall be dry and clean.
5.6.2 The painted parts shall be unoiled and de-rusted.
5.6.3 The painted parts shall be evenly painted, and shall be free from defects such as
bubbles, cracks and peeling.
5.6.4 The paint used for the first time shall be subjected to a quality comparison test.
The specific requirements shall be determined through negotiation between the supplier
and the buyer.
5.7 Shear force of cast aluminum flange
5.11.3 Pressure resistance under displacement conditions (stability)
In the case of the specified displacement (rated compensation capacity under pressure),
the tightness of the compensator under the test pressure shall be guaranteed, and there
shall be no leakage and ...