J-Lay Collars - Tenaris

Innovative Tubular Accessories

J-Lay Collars

Tenaris understands the complex requirements that the J-Lay method dictates
to ensure optimal performance during the pipe laying process. In response to our
customers' request to reduce welding time and overall laying costs, Tenaris developed
this innovative solution that can enable you to achieve the same results.

▲ Finished J-lay collar J-Lay Collar Common Overall, performing manual importantly, the mother pipe
machined from a Manufacturing Process UT inspections presents is machined with a sizable
mother pipe Common manufacturing greater risks for human wall thickness (WT) that
processes involve creating error and does not cover ensures that the ID of the
J-lay collars by forging the 100% of the body of the J-lay collar corresponds
steel into the desired shape. J-lay collar. with the ID of the flow line,
Unfortunately, this method which is key for deep water
has the potential to slow The Tenaris Solution projects. The mother pipe
down production and create The Tenaris J-lay collars can can also be customized to
lower delivery times. be designed to adapt to any comply with special
Additionally, if the customer requirement. For requirements such as NACE,
engineering team needs to example, a two shoulder heavy WT (i.e. 65 mm and
make adjustments on the design can be used to more) and high specified
dimensions, a new mold will provide support when the minimum yield strength
be needed. weight of the pipe exceeds (SMYS).
the tensioning device
Once the J-lay collar has capacity or to stop any To ensure reliability of the
been forged, it generally buckle in the pipe. The J-lay J-lay Collar, Tenaris also
goes through a manual UT collars are also used to developed a “state of the
inspection process, which is withstand the tensile load art” Non-Destructive
not as accurate as the of a multi-joint pipe, the Testing (NDT) process with
automatic UT process that misaligned bearing load at automated UT.
detects all longitudinal and the collar, and the pipeline
transversal outside diameter column from the vessel to This NDT process covers
(OD) / internal diameter the seabed. both the mother pipe and
(ID) imperfections. the final product, and
In order to achieve such involves the following: Full
Furthermore, the manual reliable use of the J-lay Length Ultrasonics on the
process cannot perform collars, Tenaris designs the Mother Pipe, Blanking and
inspections on the shoulder mother pipe with a special Final Machining, Visual and
area, which is the most chemical composition and Dimensional Inspection,
critical area of the outstanding mechanical Ultrasonics on Machined
J-lay collar, since it will properties. A CNC Lathe J-lay collar (Compression
support the pipe column. machine is used to machine Wave over 100% of collar
both the OD and the ID, length), Wet Flourescent
along with the shoulders Magnetic Particle Inspection
of the J-lay collar. Most and Packing and Shipping.

The Tenaris
NDT Inspection
Process

Advantages of the Tenaris Full Length Automated The finished J-lay collars
Solution Ultrasonic Testing also receive a Compression
The Tenaris solution After the heat treatment, Wave inspection for Laminar
considerably reduces welding which involves quenching type imperfections over the
time due to the special and tempering, the mother entire length of the J-lay
chemical composition and pipe is inspected by the collar including the body
properties of the J-lay collar, ultrasonics to assure the and the shoulders. The
which is designed to have a integrity of the material artificial reference reflectors
perfect match with the steel prior to blanking or shown on the screen shot
of the flowline. It also ensures machining operations. (next page) demonstrate
that there will be an exact the sensitivity of the
match between the J-lay The mother pipe material Compression Wave. These
collar ID and the flowline ID. for the fabrication of the reflectors are artificially
J-lay collars is subject to induced holes used for the
The automated UT system 100% volumetric ultrasonic calibration of the Automatic
increases reliability by inspection using Shear Wave Ultrasonic Scanning System.
guaranteeing a 100% ultrasonics for Longitudinal The actual size of the
inspection frequency on both and Transverse ID/OD flaw reflectors range from 1mm
the mother pipe and the J-lay detection, and Compression to 3 mm.
collar. Due to the automated Wave ultrasonics for the
nature of the system, it detection of wall variations
avoids the “human error” and Laminar imperfections.
factor, and also has a data
storage capability that
enables the future retrieval of
inspection data.

Lastly, our solution provides
you with the flexibility to
make adjustments to the J-
lay collar design prior to
machining, if necessary.
Overall, these advantages
enable the J-lay collar to
better withstand the tensile
load of multi-joint pipes and
provide better mechanical
properties while improving
the laying process.

J-LAY COLLAR IN UT TESTING MACHINE

SCREEN SHOT OF FULLY AUTOMATED ULTRASONIC SCANNING SYSTEM

BODY SHOULDERS The screen shot shows the
C-Scan presentation of the
Artificial Reference Standard used
Reference for the calibration of the
Reflectors Automatic Ultrasonic
Scanning System. The
artificial reference reflectors
range in size from 1mm to
3mm and clearly demonstrate
the system sensitivity.

Artificial
Reference
Reflectors

Innovative Tubular Accessories J-Lay Collars

Dimensional Inspection Wet Fluorescent Magnetic
Dimensional inspection is Particle Inspection
performed on both the ID The entire surface of each
and OD surfaces of the J-lay finished J-lay collar is wet
collar to assure compliance magnetic particle examined
with the applicable J-lay according to customer
collar design. specification. The
continuous method of
examination is used, along
with longitudinal and
circular magnetization
techniques. The ID and
OD surfaces are examined
and parts are demagnetized
before packaging.

Technical Specifications Full Product Range of
Tubular Accessories
ID ID At Tenaris, ensuring that
we develop the right product
ID Tolerances: + 0/ -0.1mm solutions to meet the needs
Design: According to Customer Specification of our valued clients is a
Inspection Frequency permanent objective. We
• Ultrasonic inspection of “Mother Pipe”: 100% offer a full suite of innovative
• Dimensional & Visual Inspection of Finished J-Collar: 100% tubular accessories which
• Ultrasonic Inspection of Finished J-Collar: 100% include Anode Pads, Bends,
• Wet Fluorescent Magnetic Particle Inspection: 100% Buckle Arrestors and services
like Internal and External
Coating and Double
Jointing. To support our
product offering, we provide
customers with their own
Tenaris Project Manager.
This individual serves as the
single, proactive
communications channel
throughout the duration of
the project and ensures on-
time delivery of the full order.

Contact Us Tenaris Marketing Communications
©Tenaris. All rights reserved
For further information, please contact your local Sales Representative or
Services Development Manager
César Pulido
[email protected]
(52) 229 989 1109 tel
(52) 229 989 1115 fax

www.tenaris.com

August 2003