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GB/T 16507.6-2022 English PDF (GBT16507.6-2022)

GB/T 16507.6-2022 English PDF (GBT16507.6-2022)

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GB/T 16507.6-2022: Water-tube boilers - Part 6: Inspection, testing and acceptance
GB/T 16507.6-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 27.060.30
CCS J 98
Replacing GB/T 16507.6-2013
Water-tube boilers - Part 6: Inspection, testing and
acceptance
ISSUED ON: MARCH 09, 2022
IMPLEMENTED ON: OCTOBER 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 7
1 Scope ... 9
2 Normative references ... 9
3 Terms and definitions ... 10
4 Material acceptance ... 10
5 Product size, forming processing and visual inspection of welded joints ... 11
6 Passing ball inspection ... 13
7 Spectral inspection... 14
8 Non-destructive testing ... 14
9 Mechanical performance inspection for product welded joints ... 19
10 Hydrostatic test ... 21
11 Documents used for inspection ... 23
12 Exit-factory information, product nameplate and marking ... 24
Annex A (normative) Certificate of boiler product ... 26
Annex B (normative) Code numbering method for special equipment ... 29
Bibliography ... 31
Water-tube boilers - Part 6: Inspection, testing and
acceptance
1 Scope
This document specifies the material inspection, product size, forming process and
appearance inspection of welded joints, ball inspection, spectral inspection, non-
destructive testing, mechanical performance inspection of product welded joints,
hydraulic test, inspection documents, exit-factory information, metal nameplates and
marking requirements for pressure elements of water-tube boilers and non-pressure
elements directly connected to the load.
This document is applicable to the inspection, test and acceptance of the pressure
elements of water-tube boilers defined in GB/T 16507.1 and the non-pressure elements
directly connected to them.
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 2652, Destructive tests on welds in metallic materials - Longitudinal tensile
test on weld metal in fusion welded joints
GB/T 2900.48, Electrotechnical terminology of boilers
GB/T 16507.1, Water-tube boilers - Part 1: General requirements
GB/T 16507.5, Water-tube boilers - Part 5: Fabrication
JB/T 3375, Rules for receiving acceptance of materials for boiler construction
NB/T 47013.2, Nondestructive testing of pressure equipment - Part 2: Radiographic
testing
NB/T 47013.3, Nondestructive testing of pressure equipment - Part 3: Ultrasonic
testing
NB/T 47013.4, Nondestructive testing of pressure equipment - Part 4: Magnetic
particle testing
NB/T 47013.5, Nondestructive testing of pressure equipment - Part 5: Penetrant
testing
NB/T 47013.10, Nondestructive testing of pressure equipment - Part 10: Ultrasonic
time of flight diffraction technique
NB/T 47013.11, Nondestructive testing of pressure equipment - Part 11: Standard
practice for X-ray digital radiography
NB/T 47013.14, Nondestructive testing of pressure equipment - Part 14: X-ray
Computed radiographic testing
NB/T 47013.15, Non-destructive testing of pressure equipment - Part 15: Phased
array ultrasonic testing
NB/T 47016, Mechanical property tests of product welded test coupons for pressure
equipment
Catalog of Special Equipment (General Administration of Quality Supervision,
Inspection and Quarantine of the People's Republic of China No. 114 in 2014)
3 Terms and definitions
The terms and definitions defined in GB/T 2900.48 and GB/T 16507.1 as well as the
followings apply to this document.
3.1 hydrostatic test pressure
During the hydrostatic test, the pressure applied to the boiler system or pressure
components (elements) according to regulations.
4 Material acceptance
4.1 General requirements
Boiler manufacturers shall formulate material procurement standards. According to the
regulations, steel plates for boilers, steel pipes for boilers, structural steel plates (used
to manufacture flanges and webs of large plate girders), steel strips, section steel (height
is 250mm and above, or angle steel side width is 250mm and above), round steel (for
the manufacture of tie rods and suspenders with a diameter of 40mm and above),
forgings, steel castings, iron castings, welding materials (including welding rods,
welding wires, flux-cored welding wires and fluxes), are subject to enter-factory
acceptance.
4.2 Material quality certification
records.
5.3 The finished product shall be tested for the corresponding size. The testing results
shall comply with the provisions of GB/T 16507.5.
5.4 Welded joints of pressure elements (including joints welded between non-pressure
elements and pressure elements) shall be visually inspected and at least meet the
following requirements.
a) The overall dimensions of the weld shall meet the requirements of design
drawings and process documents.
b) Butt weld height shall not be lower than base metal surface. The weld and base
metal shall transition smoothly. There are no cracks, slag inclusions, arc craters,
incomplete fusion and pores on the surface of the weld and heat-affected zone.
c) Longitudinal and circular seams of drum, start-up (steam-water) separator, water
storage tank, header or pipeline, and splicing welds of heads have no undercuts.
The undercut depth of other welds shall not be greater than 0.5mm. The total
length of the undercut on both sides of the pipe weld shall not exceed 20% of the
circumference of the pipe. It shall not exceed 40mm.
d) Concave depth: no more than 2mm.
e) Start-up (steam water) separators, water storage tanks, headers, and roots of pipes
protrude: not more than 3mm.
f) Butt weld reinforcement:
1) Drum, start-up (steam-water) separator, water storage tank, header, pipeline:
not more than 15%t and not more than 4mm;
NOTE: For single-sided welding, t is the nominal thickness of the plate or pipe; for double-
sided welding, t is the groove depth of the front and back sides.
2) Pipe: no more than 3mm.
g) Connection weld between flat steel and pipe:
1) The welding between the flat steel and the pipe shall be continuous. There shall
be no missing welding;
2) Weld formation shall be smooth and flat. The transition between the weld and
the base metal shall be smooth. There shall be no cracks, slag inclusions, arc
craters and other defects on the surface of the weld;
3) There shall be no single air hole with a diameter greater than 2mm on the
surface of the weld between the flat steel and the pipe. At the same time, there
passing ball.
6.4 When the ball passes the internal threaded pipe, the steel ball as the passing ball
shall be selected according to the minimum inner diameter given in the internal threaded
pipe standard. If a pipe specification chosen that is not specified in the internal thread
pipe standard or if the minimum inner diameter is not specified, then the minimum inner
diameter is the nominal outer diameter of the pipe minus 2 times the sum of the nominal
wall thickness of the pipe and the thread height. That is, d = D -2 × (nominal wall
thickness of the pipe + thread height).
6.5 If the passing ball is blocked according to the provisions of 6.1~6.4, select the steel
ball to pass according to the minimum inner diameter of the pipe actually measured.
6.6 Sponge ball c...
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