Materials and NDE Book C MQPS 6-1
Materials and Qualification Procedures for Ships
Procedure 6-1
Approval of a Works for the Manufacture of Steel Pipes and Tubes
1 Introduction
1.1 Application for approval
1.1.1 In order that consideration may be given to approval of a works for the manufacture of steel pipes and tubes, the local Surveyors are to submit a report to Materials and NDE Department, giving the information listed in Sections 2 and 3 together with the results of approval tests carried out under their survey.
1.1.2 The names of approved works will appear in LR's List of Approved Manufacturers of Steel Pipes and Tubes which is published on the intranet.
1.1.3 Approved works will be subject to periodic inspection (see Procedure 1-1).
1.2 Scope
1.2.1 The procedure applies to works manufacturing seamless and/or welded steel pipes and tubes.
1.3 Related Rules
1.3.1 LR's Rules and Regulations for the Classification of Ships (hereinafter referred to as the Rules for Ships).
1.3.2 LR's Rules for the Manufacture, Testing and Certification of Materials (hereinafter referred to as the Rules for Materials).
2 Information required for approval认可要求资料 2.1 Product details产品详述
2.1.1 The manufacturer is to provide the following product related details：制造商应提供下列与产品有关的详细资料。
(a) Name and address and brief
statement of background indicating
whether the works is new or long
established.工厂名称、地址和背景简述，说明工厂是新厂还是老厂。 (b) Types and steel grades of pipes and
tubes in general production.一般生产的钢管的型号和钢种 (c) Maximum diameter and wall
thickness which can be manufactured
and for which approval is required.能够制造的最大外径和壁厚钢管，以及认可钢管的最大外径和壁厚。
(d) Estimated total annual production.评估总的年产量。
(e) Types and steel grades of pipes and
tubes for which approval is required.认可钢管的型号和钢种
免水冲厕所2.2 Works with steelmaking facilities炼钢工厂
2.2.1 Works with steelmaking facilities are to supply the following information:
(a) Details number and capacity of each
steelmaking unit.
(b) Where applicable, details of special
equipment such as vacuum
de-gassing.
(c) Details of raw materials used in
steelmaking and particularly the
source and composition of iron and
scrap used.
(d) Details of steelmaking and
deoxidation practices.
(e) Dimensions, masses and types of
ingots in use and brief details of
method of casting, i.e. top or bottom
poured.
(f) Brief details of furnaces used for
reheating ingots including dimensions,
type of fuel used and facilities for
temperature measurement and control.
(g) Description of rolling mills used for the
production of billets and strip. This is to
include the width and diameter of the
rolls.
(h) Where applicable, details of
continuous casting plant including
dimensions of billets which can be
produced.
2.3 Works without steelmaking facilities没有炼钢的工厂
2.3.1 Works without steelmaking facilities are to supply the following information：没有炼钢的工厂应提供下列资料：
(a) Usual sources for the supply of
billets and/or hot coiled strip. (These
sources must be steelmakers
approved by LR).钢坯和/或钢带通常供方。（这些供方必须是LR认可）。
(b) Details of the system used for the
identification, check analysis and
storage of billets and coils of strip.材料标识，成分核对和钢坯、钢带的储存系统的详细资料。
2.4 All works所有工厂
2.4.1 All works are to supply the following information：所有工厂应提供下列信息：
(a) Facilities for the surface inspection of
billets and strip.钢坯和钢带表面检查设施。
(b) Facilities for the surface dressing of
billets.钢坯表面处理的设施。
(c) Brief details of the furnaces used for
reheating billets including dimensions,
type of fuel used and facilities for
temperature measurement and control.简述钢坯加热炉，包括尺寸，燃料的型号和温度测量与控制的设施。 (d) Description of the process and
equipment used for the manufacture of
seamless and/or welded pipes and
tubes.无缝钢管和/或焊管制造过程和设备的描述。
(e) Details of heat treatment furnaces
including dimensions, type of fuel and
facilities for temperature measurement
and control.热处理炉的详细资料，包括尺寸，燃料和测量与控制温度的设施
(f) Facilities available for mechanical
testing, chemical analysis and
metallographic examinations. This is to
include information regarding the name
of the manufacturer, type number or
description, and calibration status of all
machines used for tensile, impact and
hardness testing. 机械性能试验，化学成分分析和金相检查设施。这应包括制造商的名称，型号，编号或描述，和拉伸、冲击和硬度设备的校准状态。 (g) Facilities available for nondestructive
examinations. This is to
include a full description and calibration
standard for `on-line' ultrasonic or eddy碳化稻壳>无铬钝化液
current testing.无损探伤设施。这包括在线超声波或涡流探伤校准标准和完整描述。
(h) Details of the system used for the
identification of pipes and tubes at all
stages of manufacture including
facilities for checking composition
before dispatch.详述钢管制造所有阶段标识系统，包括发货前化学成分核对。
(j) Facilities for hydraulic testing.水压试验设施。
(k) Facilities for the visual examination of
external and internal surfaces.外部、内部表面外观检查设施。
(l) Details of the inspection and quality
control systems established in the
works. These are to include the name
and qualifications of the Quality
Manager and the number and
qualifications of staff employed on
inspection and quality control activities.
The lines of responsibility of the
Quality Manager and the Production
Manager are to be indicated,
preferably in the form of an
organization chart showing the senior
management positions to whom they
report.详述工厂建立的检验和质量管理体系。这些包括质量经理的姓名和资格，以及检验人员的数量和资格证书。质量经理和生产经理的职责，组织结构图显示他们报告的上级管理职位。
(m) The compositional limits, deoxidation
practice and heat treatment which the
manufacturer proposes to use for the
various steel grades, as detailed in
Ch 6 of the Rules for Materials, and
for which approval is required.不同钢种，化学成分要求，还原方法和热处理
Materials and NDE Book C MQPS 6-1
3 Approval test programme认可试验大纲
3.1 Selection of material材料选择
3.1.1 Approval tests are to be carried out on at least four batches of pipes or tubes. These are
to be from different casts and be representative of the dimensions and steel grades for
which approval is requested.认可试验至少在4个批次的钢管上进行。这些应是不同的炉号和认可要求的代表性尺寸和钢种
3.2 Specific product approval information规定的产品认可资料
3.2.1 For each batch of pipes or tubes selected for approval tests, the manufacturer is to provide the following information：对用于认可试验的每批次的钢管，制造商应提供下列信息：(a) Method of manufacture including, for
seamless pipes and tubes, the
Dimensions of ingots and billets.无缝钢管制造方法，包括钢锭和钢坯的尺寸。
(b) Dimensions of finished pipes or tubes.成品钢管尺寸
(c) Ladle analysis including residual
elements, aluminium (either total or
acid soluble), other grain refining
铝槽钢elements (where applicable) and
nitrogen.熔炼分析包括剩余元素，铝（合计或酸溶性），其他精炼元素（适用时）
(d) Details of heat treatment.热处理详细资料
Materials and NDE Book C MQPS 6-1
4 Approval tests认可试验
4.1 Tests, test samples and specimens试验，试样和试棒
4.1.1 The dimensions of test samples and mechanical testing procedures are generally to be in accordance with Ch 2 of the Rules for Materials.试样尺寸和试验程序应符合材料规则第2篇。
4.1.2 The following tests and examinations are to be carried out on each batch of pipes or tubes submitted for approval tests：每个认可试验的钢管应执行下列试验和检验。
微电解填料
(a) Hydraulic test of each pipe or tube.每支钢管的水压试验。
(b) Careful visual examination of external
and bore surfaces.外部和内部钢管的外观检查。
(c) When facilities are available, eddy
current or ultrasonic examination of
each pipe or tube.探伤设备有时，每支钢管的涡流或超声波探伤
(d) From each batch at least two tensile
tests and two flattening or bending
tests. After the flattening and bending
tests have complied with the specified
requirements, the tests are to be
continued until the sides touch or
fracture occurs.每个批次，至少2个拉伸和2个压扁或弯曲试验。在压扁和弯曲已满足规定要求后，试验应继续直到两边接触或裂纹发生。
(e) Two expanding or flanging tests are
required on each batch of welded
pipes or tubes and on all boiler and
superheater tubes. After the
expanding or flanging tests have
complied with the specified
requirements, the tests are to be
continued until fracture occurs.每批次焊管和锅炉热交换器管应做2个扩口或卷边试验。在扩口或卷边试验满足规定的要求后，试验应继续直到裂纹发生。
(f) Where the wall thickness is ε6 mm
飞机加油车three Charpy V-notch impact test
specimens are also to be taken from
each batch. These are to be cut in the
longitudinal direction with the notch
perpendicular to the original surface of
the pipe. The tests are to be carried out
at 0°C except when the pipes are in a
grade of steel suitable for low
temperature service. In such cases the
test temperature should be in
accordance with the appropriate
requirements of Ch 6 of the Rules
for Materials. Both the energy absorbed
and the percentage crystallinity are
to be reported.对壁厚大于6mm的钢管，每批次钢管应取3个夏比V形缺口试验。这些应是纵向取样，缺口应垂直于钢管表面。试验温度在0°C，除了当钢管用于低温时。不锈钢低温试验温度在-196°C。
(g) Chemical analysis of product.产品的化学成分分析。
(h) In the case of welded tubes, a macro
section in way of the weld. Where the manufacturer performs
longitudinal welding using filler material
then details of welding procedure tests
are required to confirm mechanical
properties are satisfactory for the grade of
pipe material. This also applies where
the manufacturer proposes to perform
weld repairs.
(j) Representative photomicrographs at代表性的金相显微照片。
x100 magnification. For welded pipes
this is to include the weld zone.
4.1.3 In addition to selecting and witnessing the above tests, Surveyors are to carry out an inspection of the manufacturing facilities and report on the general condition of the equipment and orderliness of the works. During this inspection the opportunity is to be
taken to examine visually pipes and tubes at all stages of manufacture.
5 Validity of approval certificate
5.1 Duration
5.1.1 The initial approval certificate will have a validity of three years.
5.1.2 For the validity to be extended for a further three years the Surveyors should undertake a periodic inspection in accordance with Procedure 1-1.
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