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NB/T 47019.1-2011 (NB/T47019.1-2011)

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NB/T 47019.1-2011English135 Add to Cart 0--10 minutes. Auto-delivery. Purchase technical specification for boiler and heater exchanger tubes/pipes. Part 1: General Requirements NB/T 47019.1-2011 Obsolete NB/T 47019.1-2011


NB/T 47019.1-2011: PDF in English (NBT 47019.1-2011)
NB/T 47019.1-2011
ICS 27.060.30
J 75
NB
INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Purchase technical specification for
boiler & heater exchanger tubes/pipes -
Part 1. General Requirements
ISSUED ON. JULY 01, 2011
IMPLEMENTED ON. OCTOBER 01, 2011
Issued by. National Energy Administration
Table of contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Terms and definitions ... 5 
4 Classification and marking ... 6 
5 General requirements ... 7 
6 Dimension, shape and allowable mass deviation ... 8 
7 Technical requirements ... 13 
8 Inspection and test rules ... 20 
9 Packaging, marking and quality certificates ... 21 
Foreword
This standard NB/T 47019—2011 “Purchase technical specification for boiler &
heater exchanger tubes/pipes” was compiled with reference to the European
standard EN, United States standard ASME, Japan standard JIS, and so on,
combining with China's national standards and industry standards, AND the
purchase agreement of boiler and heat exchanger manufacturers.
This standard covers the purchase technical specifications for the steel tubes
and non-ferrous metal tubes which are normally used in boiler, heat exchangers
and other pressure equipment. It is mainly divided into the following eight parts.
- Part 1. General requirements;
- Part 2. Non-alloy and alloy steel with room temperature properties;
- Part 3. Non-alloy and alloy steel with specified elevated temperature
properties;
- Part 4. Low alloy steel for low-temperature services.
- Part 5. Stainless steel;
- Part 6. Ferrite/austenitic duplex steel;
- Part 7. Copper and copper alloy tube;
- Part 8. Titanium and titanium alloy.
This part is the first part of NB/T 47019-201 1. As compared with the domestic
and international standards, the main differences are as follows.
- SPECIFY the rights, responsibilities and obligations of manufacturers,
suppliers and purchasers;
- SPECIFY the basic requirements for steel smelting, tube billet and tube
making;
- ADD the requirements for tube end machining and weld reinforcement;
- SPECIFY more stringent tolerance requirements for heat exchanger tubes;
- ADD the U-bend finished tube packaging requirements.
Purchase technical specification for
boiler & heater exchanger tubes/pipes -
Part 1. General Requirements
1 Scope
1.1 This part of NB/T 47019 specifies such purchase technical specifications as
the tube size, shape, mass, technical requirements, inspection and test rules,
quality certificates, and so on, AND defines the duties, rights and obligations of
the relevant parties.
1.2 This part applies to the carbon steel, alloy steel, stainless steel, low
temperature steel tube, and non-ferrous metal tube used for boilers, heat
exchangers and other equipment.
1.3 Tubes for fluid delivery may refer to the requirements of this standard.
2 Normative references
The following documents are essential to the application of this document. For
the dated documents, only the versions with the dates indicated are applicable
to this document; for the undated documents, only the latest version (including
all the amendments) are applicable to this standard.
GB 150 Pressure vessels
GB 151 Tubular heat exchangers
GB/T 16507 Water-tube boilers
GB/T 16508 Shell boilers
3 Terms and definitions
3.1
Seller (supplier)
It refers to the organization that provides the products and services
complying with the requirements of this part, including manufacturers and
suppliers.
3.2
Manufacturing company
It refers to the factory organization which manufactures the product
complying with the requirements of this part, AND provides the products and
services to the buyer (purchaser).
3.3
Supplier
It refers to the organization which provides the products and services
produced by the manufacturing company AND complying with the
requirements of this part to the buyer.
3.4
Buyer (purchaser)
It refers to the factory organization which purchases the products and
services complying with the requirements of this part, AND uses them for the
part & component manufacturing for boiler and heat exchanger.
4 Classification and marking
4.1 It can, based on the manufacturing methods, be divided into the following
categories.
a) Hot-rolled (extruded) tube;
b) Thermal expansion tube;
c) Forged boring tube.
d) Cold drawn (rolled) tube;
e) Welded tube;
f) Welded-rolled tube.
4.2 It can, based on the material types, be divided into the following categories.
c) Product name;
d) Product classification;
e) Manufacturing methods and delivery status;
f) Material designation;
g) Specifications (outer diameter and wall thickness);
h) Quantity (mass or length or count);
i) Test requirements;
j) Optional requirements;
k) Any additional requirements.
6 Dimension, shape and allowable mass deviation
6.1 Allowable deviation of outer diameter
When the tube is delivered based on the nominal outer diameter D, the
allowable deviation of outer diameter shall comply with the requirements of
Table 1. If the allowable deviation level of the outer diameter of the tube is not
specified, the allowable deviation of the outer diameter of the tube shall be as
specified in the general level.
6.4.2 Along any cross section, the wall thickness unevenness shall be as below.
cold drawn tube does not exceed 16%; hot-rolled (extruded) tube does not
exceed 18%.
6.5 Allowable length deviation
6.5.1 The supply length L of the tube is normally 3000 mm - 12000 mm.
However, if agreed between the seller and buyer, the tube of other lengths or
fixed lengths can be supplied.
6.5.2 When the tube is to be supplied in fixed length or multiple length, the
allowable length deviation is specified as follows.
a) D ≤ 57 mm.
L ≤ 6000 mm, the deviation is 0 mm ~ 4 mm;
6000 mm < L ≤ 9000 mm, the deviation is 0 mm ~ 6 mm;
If the length L exceeds 9000 mm, then ADD another 3 mm deviation for
each 3000 mm or its remainder, BUT the maximum deviation will not
exceed 13 mm.
b) 57 mm < D ≤ 159 mm.
L ≤ 6000 mm, the deviation is 0 mm ~ 10 mm;
6000 mm < L ≤ 9000 mm, the deviation is 0 mm ~ 15 mm;
L > 9000 mm, the deviation is 0 mm ~ 20 mm;
c) D > 159 mm, the deviation is 0 mm ~ 30 mm.
6.5.3 When the tube is to be supplied in fixed length or in multiple length, the
length of each multiple length shall be reserved with the notch allowance as
specified below.
c) D ≤ 159 mm, the deviation is 5 mm ~ 10 mm;
c) D > 159 mm, the notch allowance is 10 mm ~ 15 mm.
6.6 Out of roundness
6.6.1 The out of roundness of the tube shall not exceed 80% of the nominal
outer diameter tolerance.
6.6.2 As for the thin wall tube for which the outer diameter D ≤ 50 mm, wall
thickness S ≤ 2% D OR the outer diameter D > 50 mm and wall thickness S ≤
6.9 Welded tube weld reinforcement
6.9.1 The outside weld reinforcement shall be removed to be level with the base
metal.
6.9.2 The inside weld reinforcement shall be removed through mechanical
method. As for the welded tube for which the outer diameter D ≤ 38 mm, the
maximum reinforcement of any point within the tube shall not exceed 0.15 mm;
as for the welded tube for which the outer diameter D > 38 mm, the maximum
reinforcement of any point within the tube shall not exceed 0.25 mm
6.10 Mass
The tube can be supplied based on actual mass; however, if agreed between
the buyer and seller AND noted in the contract, the tube can also be supplied
based on theoretical mass.
6.11 The size, shape, and allowable deviation of the non-ferrous metal tube
shall comply with the requirements of relevant parts of this standard.
7 Technical requirements
The one or more test requirements of this chapter will be specified in the other
parts of this standard OR in the purchase order. The tubes produced in
accordance with the foreign designation shall comply with the requirements of
the corresponding foreign standards. If necessary, they shall be subjected to
the test items which are supplemented in this standard.
7.1 Manufacturing methods
7.1.1 Smelting
The smelting of tube materials shall comply with the relevant parts of this
standard.
7.1.2 Manufacturing methods of tube billet
The tube billet can be manufactured through molding, continuous casting, or
hot rolling (forging).
7.1.3 Tube manufacturing methods
Steel tube can be manufactured through hot rolling (extrusion, thermal
expansion), forged boring, cold rolling (drawing), welding, and so on. If the steel
The flattening test of non-ferrous metal tube shall comply with the relevant parts
of this standard.
7.4.1.1 Ductility test
PRESS the sample to the extent that the spacing between the two plates is H,
which is calculated in accordance with the equation (2).
Where.
H – Spacing between the two plates, in the unit of mm;
S – Tube wall thickness, in the unit of mm;
D – Tube nominal outer diameter or calculated diameter, in the unit of mm;
a – Deformation coefficient of unit length, which is.
0.08 for high quality carbon structural st...
......
 
(Above excerpt was released on 2016-11-02, modified on 2021-06-07, translated/reviewed by: Wayne Zheng et al.)
Source: https://www.chinesestandard.net/PDF.aspx/NBT47019.1-2011