Corrosion monitoring

The Hollow Plug Assy is a key component to the high pressure Access Fitting assembly, as the plug body provides the seal in the access fitting, there by maintaining line pressure. The plug also serves an important function of holding the monitoring equipment which is exposed to the system, and is the component to which the Retriever attaches in order to access and service the monitoring equipment.

Hollow Plug Body 316L SS
Primary Packing PTFE Glass
Hollow Plug Bore 316L SS
Plug Nut 316L SS
Pipe Plug 316L SS
Set Screws 316L SS
Seal Plug Nut TEFLON, PTFE Glass, Others

Hollow Plug – used in conjunction with:

  • Electrical Resistance probes
  • Linear Polarization probes
  • Galvanic and Hydrogen probes

Mechanical Retriever Tools is a precision tool which allows safe, easy insertion and removal of various equipment and tools through a Access Fitting, without de-pressurizing the pipeline or vessel. The mechanical retriever is designed to operate under mechanical principles, and the number of turns to completely seat or retract a component is a known constant.

Pressure Rating – 3600 PSI (24.8 Mpa)
– 6000 PSI (41.3 MPa)
Material 316L / SS
Standard Meets NACE MR0175 and MR0103
Stoke Length For Type 36:
– 14 Inch
– 18 Inch
– 25 Inch
For Type 60:
– 37 Inch
– 49 Inch
– 61 Inch
Refer Catalog Bcormon

All supports are supplied with two assembly hardware assemblies, screw mounting for corrosion coupon so that it is not released with the lock. The insulation of coupons is supplied with the coupons, any material and length can be supplied in special order.

Material 316L / SS
Weight 20 gr

Multiple disc coupon available for pipes with diameters of 6 “or more. This method of protection against corrosion of the pipe offers the following advantages: Inherent orientation parallel to flow, greater area area at a specific level, greater quantity and variety of Coupon materials, easier monitoring in stratified flow or multi-phase flow, and the location of corrosion coupon in the assembly access recreation area for monitoring gas pockets or stagnant areas.

Multiple disc coupon 2″ system can be used to Monitor:

  1. Top of line
  2. Middle of line
  3. Bottom of line


Material AISI 1018, ASTM A106 gr B, or others
Weight Below 50 gram union depend on the model, details will be listed on the envelope
Standard NACE RP-0775 and ASTM G-1
Dimension OD:1.25″, Thickness 1/8″
Refer Catalog Bcormon

Material PTFE Glass
Weight 20 gr

The Ring Type Joint flanges are typically used in high pressure (Class 600 and higher rating) and/or high temperature services above 800°F (427°C). They have grooves cut into their faces which steel ring gaskets. Check Here to Spiral Wound Gasket


Rod Corrosion Coupons standrd size is Ø ¼” x 3″ (Ø 6.3mm x 76.2mm) for 1″ systems corrosion monitoring, which are commonly used for oil and gas, upstream and downstream, chemical companies, etc.


Weight Below 50 gram union depend on the model, details will be listed on the envelope
Material Stainless Steel, Carbon Steel
Dimension Ø ¼” x 3″ (Ø 6.3mm x 76.2mm)
Refer Catalog Bcormon

Sacrificial Anodes are highly active metals that are used to prevent a less active material surface from corroding

A simple method of protection connects the metal to be protected to a more easily corroded “sacrificial metal” to act as the anode. The sacrificial metal then corrodes instead of the protected metal. For structures such as long pipelines, where passive galvanic cathodic protection is not adequate, an external DC electrical power source is used to provide sufficient current. Cathodic protection systems protect a wide range of metallic structures in various environments.

Common applications are:
steel water or fuel pipelines and steel storage tanks such as home water heaters; steel pier piles; ship and boat hulls; offshore oil platforms and onshore oil well casings; offshore wind farm foundations and metal reinforcement bars in concrete buildings and structures. Another common application is in galvanized steel, in which a sacrificial coating of zinc on steel parts protects them from rust.


Sacrificial Anodes

Scale Inhibitor from diphosphonic acid (C2H8O7P2)blended and effective scale inhibitor used to prevent scale formation due to Calcium Carbonate,Magnesium Hydroxide and other common scale forming salts. No maintenance is required in carrying out the addition of this scale inhibitor. Its liquid form makes it convenient to use directly and the dosage level is determined with respect to the properties of the water to be treated.


Appearance  Clear Liquid
Color  Colorless
Solubility  Soluble in water
pH  3.0 ~ 5.0
Specific Gravity  1.15 ~ 1.40
Odor  Product specific
Viscosity  < 20 cSt

Avoid contact with eyes, skin and clothing. In case of content eyes , immediately flush with water for 15 menutes and seek medical aid. Wash skin immediately if there is any contact and remove contaminated clothing.
The optimum dosage will depend upon the type of the system and severity of the scaling
20 liter per pail or 200 liter per drum

Single Block Services Valve Corrosion are especially designed for use with Access Fittings and  Retrievers.

Pressure Rating 3600 PSI (24.8 Mpa)
Seal Options Available for Temperature Rating up to +450 °F (+232 °C)
Compatible All Retrievers
Material 316L / SS, A105 CS
Standard Meets NACE MR0175 and MR0103
Safe Pressurization with By-Pass Bleed Valve Provides
Type Single Service Valve

Solid Plug Body are the internal parts of the Access Fittings which act as the seal of access fitting to maintain the line pressure as well as the retrievable carrier for holding the monitoring devices. Used for various types of coupon holders, sacrificial sand probes and Chemical Injection/Sampling devices

The Standard Assembly Consists of:

Solid Plug Body 316L SS
Primary Packing PTFE Glass
O-ring Viton
Solid plug Nut with set screw 316L SS
Pipe Plug 316L SS

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