不锈钢船船体密性试验大纲

2.1.1如果满足下列两个条件之一，则结构试验可以在保护涂层喷刷后进行（仅限结构试验中不会破

坏掉保护涂层的情况）：

Structural testing may be carried out after the protective coating has been applied, provided that one of the following two conditions is satisfied(only if protective coating will not be damaged during testing):

（1）所有焊接(除了自动焊)都已完工并在保护涂层喷刷之前，尽可能的使用真空试验，若无法进行真空试验，可要求着色渗透试验或超声波检测，试验使验船师和船东认为满意。

All the welds(excepting automatic welds)are completed and vacuum test is carried out as soon as possible,if not practical,dye penetration test or ultrasonic test may be required to the site surveyor and owner’s representative satisfaction with the testing.

（2）在保护涂层喷刷之前进行了渗漏试验。

Leak testing is carried out prior to the application of the protective coating.

2.1.2如未作渗漏试验，保护涂层的喷刷应在下列部位的结构试验完成后进行：

In absence of leak testing,protective coating should be applied after the structural testing of:

（1）所有手工和半自动施焊的对接焊缝和全焊透T型焊缝；

Manual and Semi-automatic butt and T-joints，full penetration,

（2）所有液舱边界处手工、自动、半自动的角接焊和T型焊缝；

All manual、automatic、Semi-automatic fillet and T-joints partly penetration connections on tank boundaries.

2.2渗漏试验(Leak testing)

渗漏试验是用空气或其他介质进行的试验，用以检验结构的密性。根据表1进行泄漏试验的过程中，空气压力应保持在0.015MPa(0.15kgf/cm2)。在检查前，建议舱内空气压力上升到

0.02MPa(0.2kgf/cm2),，并在船东的监视下将这个水平保持至少一小时以达到稳定状况，在液舱附

近人员要尽可能少，然后降低到试验压力。压力记录需提交船检。

Leak testing is an air or other medium test carried out to demonstrate the tightness of the structure.Where leak testing is carried out,in accordance with Table1,an air pressure of0.015MPa(0.15kgf/cm2)is to be applied during the test.Prior to inspection, it is recommended that the air pressure in the tank should be raised to0.02MPa(0.2kgf/cm2) and kept at this level for min1hour with owner supervision to reach a stabilization state, with a minimum number of personnel in the vicinity of the tank,and then lowered to the test pressure.Pressure record to be provided.

2.2.1在试验压力稳定之后和在任何检验开始之前，充气管道要与试验区域分离。在检验过程中，充

气管道绝不与试验区域重新连接。

Air filling line is to be disconnected from the tested compartment after the test pressure is stabilized and prior commencement of any examination activities.The air filling line is never to be re-connected as long as examination of the test-areas is in progress.

2.2.2在进行渗漏试验时，所有热工作需要停止，保证所有人员安全。

All hot work must stop before leak test to ensuring the safety for everybody.

2.2.3当采用空气作为试验介质时，在被试验项目的所有焊缝上涂上一层有效的渗漏显示液（如肥皂

水或同等作用的溶液）。肥皂水的效能要适合，可以使用模拟渗漏试验来检验肥皂水是否有效。

Welds are to be coated with an efficient indicating liquid(such as soap or equivalent).Efficiency of soapy water indications is to be demonstrated,by means of simulated leak.

2.2.4应装设一根与试验压力相当高度的充水U型管（最小2.2M），以避免被试验舱室超压并能验

证试验压力。该U型管的横截面积应大于供气管的横截面积。另外，试验压力还可以用一只校核过的标准压力表或船级社和船东接受的其他等效方法予以验证。

A U-tube min2.2m filled with water up to a height corresponding to the test pressure

is to be fitted to avoid overpressure of the compartment tested and verify the test pressure.The U-tube should have a cross section larger than that of the pipe supplying air.In addition,test pressure is also to be verified by means of one gauged pressure gauge.The site surveyor and owner’s representative may accept alternative means which are considered to equivalently reliable.

2.2.5在液舱边界上的所有角焊缝、除埋弧自动焊之外的焊透焊缝和装配焊缝应在保护涂层涂装之前

进行渗漏试验。在考虑到在船厂运作的质量控制程序，验船师和船东可要求对自动装配焊缝和预装配手自动焊缝的选择位置进行类似的试验。对其他焊缝，验船师和船东可以对其进行真空试验，无法进行真空试验时，可要求着色渗透试验或超声波检测，并认为满意，渗漏试验可以在完成保护涂层涂装后进行。

Leak testing is to be carried out,prior to the application of protective coating, on all fillet weld connections on tank boundaries,penetrations and erection welds excepting SAW on tank boundaries.Selected locations of automatic erection welds and pre-erection automatic welds may be required to be similarly tested at the discretion of the class Surveyor and owner Survey or taking account of the quality control procedures operating in the shipyard.For other welds,leak testing may be carried out by vacuum box prior to application of protective coating,if not practical,dye penetration test or ultrasonic test may be required to the site surveyor and owner’s representative satisfaction with the testing.

2.3冲水试验(Hose testing)

冲水试验是针对不作水压或泄漏试验的结构项目以及影响全船水密或风雨密性的其他结构项目进行的密性试验。为验证结构密性按表1要求进行冲水试验时，喷嘴处的压力至少应等于

0.2MPa(2kgf/cm2)且最大距离为1.5m，喷嘴的内径不得小于12mm。所有冲水试验前先要用粉笔

画。