储罐焊接规范(7)

2018-12-29 22:54

RPI 94/1 Annex 8.5

Page 2 of 11附录8,5,第2页(共11页) ?

- Fabrication documents (drawings and welding instructions, welding sequence schedule, testing and inspection schedule);制造文件(图纸和焊接说明、焊接顺序图、检验与试验计划);

- Material certificates (for parent metal and filler metals);材料合格证(母材和填充材料);

- License (e.g. as per AD 2000-Merkblatt HP0 or ASME); 许可证书(例如符合AD 2000-Merkblatt HP0 或 ASME);

- Relevant Welding Procedure Approval Records (WPARs) for the given application;有关给定用途的相关焊接工艺审批记录(WPARs); - Relevant Welder Performance Qualification certificates (WPQs) for the given application; 有关给定用途的相应的焊接人员资格证书(WPQs);

- Test certificates of all nondestructive testing conducted, including indication of the scope of testing;所进行的所有无损检测的检验证书,包括指出检验范围;

- Assignment of welders/automatic welding machines to the welds;焊工/自动焊机的任务书;

- Documentation showing the location of the butt joints, of the back-ups on the tank bottom, unless marked on the tank bottom;除非标在罐底板图上外,标明罐底板对接接头和垫板位置的文件;

- Dimensional record (out-of-roundness, unevenness of bottom and foundation).尺寸记录(不圆度、底板和基础的不平度)。

2 Tests检测

Testing shall commence during fabrication to permit sources of error to be detected and eliminated in good time. Repaired welds shall be re-tested.检测应在最有利于缺陷源被检测出和消除的时候开始。返修焊缝应重新检测。

Oct 2001,2001年10月

The fabricator shall prepare a set of final documentation comprising at least the following:制造商应准备一份至少包含下列内容的交工文件:

A 24-hour leakage test using water shall be conducted, At the time the leakage tests are conducted, the weld zones shall be free from any coating.应进行24小时充水试漏。在试漏期间,焊缝区不能有任何涂层。

Also, a stability test shall be conducted.还要进行稳定性试验。

Bottom welds底板焊缝 ?

Bottom-to-shell joint底板与壁板接头 ?

100% Vacuum test of the weld in contact with the product (prior to and after the water-level test); 与产品接触的焊缝进行100%真空试验(在充水试验前后); ?

Shell welds 壁板焊缝 ?

For every welder involved, radiographic examination shall be performed on one weld for every welding process and every welding position prior to commencement of welding work. 对于参与焊接的每个焊工,在焊接工作开始前,每一种焊接方法和每一个焊接位置各取一条焊缝进行射线检测。 ?

Furthermore, radiographic examination shall be conducted every 30 meters of vertical weld and every 60 meters of horizontal weld (circumferential weld). The tests shall be conducted such that the welders are 'covered' according to their work on a pro-rata basis. Not less than 25% of the tests shall be conducted on joints between three members. The length of radiographs that can be evaluated shall be not less than 200 mm. Subject to client's consent, the afore-mentioned radiographic examination may be replaced with ultrasonic testing. 另外,每30米立缝和每60米水平焊缝(环焊缝)应进行射线检测。检测应覆盖焊工所施焊的比例。三层板交界处的焊缝至少检测25%。每张射线底片有效评定长度不少于200mm。在客户同意的前提下,上述射线检测可以用超声波检测替代。

Surface-crack inspection on 10% of the fillet welds. 对10%角焊缝进行表面裂纹检测。

100% Vacuum test (prior to and after the water-level test).100%真空试验(在充水试验前后)。

Shell nozzles 壳体接管 ? ?

Surface-crack inspection on not less than 10% of nozzle-to-shell welds;接管与壳体焊缝表面裂纹检测不少于10%;

Leakage test through an air gap between cutout-reinforcing plates and shell by means of the bubble method and foam-producing agents;用气泡和发泡介质检测补强板与壳体之间空气间隙的气密试验; ?

Bottom nozzles 底板接管 ? ?

Surface-crack inspection on 100% of nozzle-to-bottom welds;接管与底板焊缝100%表面裂纹检测;

In case of 'concealed' welds, 100% radiographic examination of the circumferential welds of nozzles;在有“隐蔽”焊缝的地方,接管环焊缝进行100%射线检测。 ?

Leakage test through an air gap between cutout-reinforcing plates and shell by means of the bubble method and foam-producing agents. 用气泡和发泡介质检测补强板与壳体之间空气间隙的气密试验。

24-Hour leakage test using water. 24小时充水试漏。

Oct 2001 2001年10月

Shell-to-roof joint 壳体与顶板接头 ? ? ?

Leakage test by means of the bubble method and foam-producing agents (only on tanks designed to be operated at a pressure above atmospheric). Roof 采用气泡和发泡介质检测的气密试验(仅用于罐的设计操作压力高于大气压力的情况)。

Leakage test by means of the bubble method and foam-producing agents (only on tanks designed to be operated at a pressure above atmospheric). 采用气泡和发泡介质检的气密试验(仅用于罐的设计操作压力高于大气压力的情况)。

3 Design of Welded Joints on Flat-Bottomed Tank Units平底罐单元的焊接接头设计

The welded joints shown in Table 1 are subdivided as follows:表1中的焊接接头划分如下:

1. 2. 体 3. 4. 5. 6.

Shell壳体 Nozzles接管

Shell-to-roof壳体与顶板 Roof顶板

6 7 10 11

Bottom底板

Bottom-to-shell底板与壳

Page页次 4 5

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附录8,5,第3页(共11页)

RPI 94/1 Annex 8.5

RPI 94/1 Annex 8.5

Page 4 of 11附录8,5,第4页(共11页)

Oct 2001 2001年10月

4 Table 1: Design of welded joints on fiat-bottomed tank units平底罐单元的焊接接头设计 No. 序号 Detail详图 Application 应用 Requirement(s) 要求 Remarks 备注 1. Bottom底板 The fabricator shall prepare a welding sequence schedule that aims to achieve a, stress-relieved final condition of the bottom (typically welding transverse welds (1) before executing longitudinal welds (2); back-step welding, etc.), and guarantees the flatness specified in the rules and codes of practice applied.制造商应准备一份焊接顺序方案,用来表明底板最终应力状态的目标(一般情况下,先焊横向焊缝(1),后焊纵焊缝(2),再焊带垫板焊缝等)及保证所采用标准和规范规定的平整度。 The minimum thickness of the bottom plates shall be not less than 5 mm and 6.5 mm in case of butt joints and lap joints, respectively.在采用对接接头和搭接接头时,底板的最小厚度分别不应小于5mm和6.5mm。 As a rule, bottom welds shall be executed in not less than two passes. Where the two-pass approach is employed the second pass must completely cover the first pass.作为一条原则,底板焊缝不应少于两道。在采用两道焊缝的地方,第二道焊缝必须将第一道完全盖住。 1.1 Back-up 垫板 Butt welds on back-ups shall:垫板上的对接焊缝应: - have root penetration;具有根部熔深; be durably marked on the bottom or documented on the drawing.永久地标在底板上或标在图上。


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