NEWS Section

    How to Choose Right Seals

    The right choice of a sealing system stems from the principal that the value of the losses incurred will dictated the intended level of security and its cost. In case of the bulk management companies, a high level of tampering requires a high level of security. Any big loss of revenue would point to the necessity and acceptance of a more costly but efficient security system.

    Physical Resistance:

    The most used security seals are of the “indicative” type, for removal by hand or with a simple tool. On inspection they should always indicate whether any tempering has taken place. Unlike stronger cable or bolt seals the indicative type does not offer any kind of barrier or resistance to removal.

    Raw material specifications:

    If a seal can be opened and reused again without leaving positive signs of tempering its security is questionable. Evidence of any tempering should establish without doubt whether the marks are intentional or accidental. Seals used on Liquid Bulk Tankers are usually exposed to ultraviolet rays, Salinity etc., which over time may cause chinks or accidental marks. For this reason, many oil marketing companies, refineries, utilities companies & liquid bulk transportation requires Polycarbonate Seals that last at least 20 years in intemperate climates, and are not prone to accidental damage caused by Mother Nature.

    Numbering / Code / Logo:

    In the same way the identification of the seal number/code/logo must also be kept immune to weather conditions and tempering. This is essential in order to guarantee integrity of the seal and avoid hindering tracking or audit trails. This is an important point, because the type of identification process used could make the difference between the right and wrong choice of seal. Safer and more secure methods of identification are:


    High relief numbering, where the seal and number are moulded at the same time and which is as safe, unique and indelible as a human fingerprint.

    Laser numbering/coding, known as “intelligent” identification, because it incorporates check digits and / or bar code. Not only indelible but it also allows a fast and correct registration of the sealing operation.


    Locking Device:

    Important points are: 


    Whether the capsule is open or closed. If closed, the seal will offer greater security.

    Whether the locking device is made of two or more separate pieces. In this case it can only be considered a security seal when all of its separate parts are marked with the same identification.

    But, the problem with these types of seals is that, the end user is to make sure that all the parts are marked with same identification.


    Numbering system / Code / Logo:

    The control of the seal numbering is an essential part in the security of the sealing process. In view of the huge amount of sealing operations made by different organizations, it is usual to have these operations performed by third parties. This implies the adoption of computerized control systems, which in turn will allow a quick check of the number sequence.

    Manufacturer’s credentials:

    Finally, in choosing the correct seal it is important to check the technical specifications and manufacturer’s credentials. This will discipline production methods and avoid, in the long run, any doubts about the level of security of the seals and also of their origin.