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Title02-SAMSS-006
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Total Pages17
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Page 1

Previous Issue: 28 January 2004 Next Planned Update: 1 November 2010
Revised paragraphs are indicated in the right margin Page 1 of 17
Primary contact: Abdullah M. Al-Rumaih on 873-4398

Materials System Specification
02-SAMSS-006 5 October 2005

Hot Tap and Stopple Fittings

Materials and Corrosion Control Standards Committee Members
Al-Anezi, Mohammed A., Chairman
Al-Rumaih, Abdullah M., Vice Chairman
Abdulhadi, Abdullatif I.
Al-Anizi, Salamah S.
Al-Gahtani, Moraya S.
Al-Ghasham, Tawfiq Y.
Al-Mugbel, Wajdi M.
Al-Nabulsi, Khalid M.
Al-Sannaa, Muhsen S.
Balhareth, Nasser M.
Bash, Fahad M.
Burgess, Brian W.
Choi, Ho J.
Cruz, Ivan C.
Dias, Olavo C.
Kermad, Abdelhak
Lobley, Graham R.
Mehdi, Mauyed S.
Moore, Mark A.
Niemeyer, D.C.
Palmer, Robert E.
Stark, Gregory D.
Tems, Robin D.

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Document Responsibility: Materials and Corrosion Control 02-SAMSS-006
Issue Date: 5 October 2005
Next Planned Update: 1 November 2010 Hot Tap and Stopple Fittings



Page 2 of 17







Saudi Aramco DeskTop Standards

Table of Contents

1 Scope............................................................. 3
2 Conflicts and Deviations................................. 3
3 References..................................................... 3
4 Purchase Order Information .......................... 5
5 General........................................................... 5
6 Design............................................................ 6
7 Materials......................................................... 8
8 Fabrication.................................................... 11
9 Tolerances.................................................... 13
10 Repair of Defects.......................................... 14
11 Inspection and Testing................................. 14
12 Marking......................................................... 16
13 Preparation for Shipment............................. 17
14 Material Selection and
Testing Subcommittee.................................. 17

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Document Responsibility: Materials and Corrosion Control 02-SAMSS-006
Issue Date: 5 October 2005
Next Planned Update: 1 November 2010 Hot Tap and Stopple Fittings



Page 8 of 17

paragraph 404.3.1(b)/831.4 or ASME B31.3, paragraph 304.3,
as applicable.

6.1.7.3 The minimum specified nominal thickness of the run (header)
for all sizes of fabricated tees shall be 19.1 mm (0.75").

6.2 Full Encirclement Saddles

6.2.1 Full encirclement saddles shall be in accordance with Standard Drawing
AB-036719 Type 1.

The branch shall be extruded or forged to the run. Saddles which have
the outlet welded to the run are prohibited. Only longitudinal seams are
permitted. The dimensions and plate thickness shall be as indicated in
the Purchase Order.

6.2.2 Side straps shall be provided and welded to the bottom half of the saddle
with continuous full size fillet welds. The side straps shall be 50 mm
wide if the run is under 600 mm. For runs 600 mm and larger the side
straps shall be 75 mm wide. The thickness of the straps shall be equal to
the thickness of the run.

6.2.3 The outlet shall have an outside knuckle radius of 25 mm minimum.

6.2.4 The top half of the run shall be provided with a vent hole 3 mm in
diameter.

6.3 Lifting lugs shall be provided on both sides of the lower half of all fittings size
10 in and larger.

7 Materials

7.1 General

7.1.1 The material shall be equivalent to one of the specifications listed below.
The mechanical and chemical properties of the split tee material shall be
similar to the pipe material where it will be installed, as specified in the
Purchase Order. Split tee materials of lower yield strength than the pipe
may be used unless this would result in a nominal wall thickness in
excess of 38 mm.

7.1.2 Boron shall not be intentionally added, and the residual level shall not
exceed 0.0005%.

7.2 Grade B Fittings

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Document Responsibility: Materials and Corrosion Control 02-SAMSS-006
Issue Date: 5 October 2005
Next Planned Update: 1 November 2010 Hot Tap and Stopple Fittings



Page 9 of 17

7.2.1 Materials shall conform to the requirements of ASTM A234/ASTM
A234M Grade WPB including Supplementary Requirements S1
"Product Analysis".

7.2.2 High strength starting stock shall not be used for Grade WPB fittings
without prior approval by CSD. In no case shall the actual yield strength
of the finished fittings exceed 386 MPa (56,000 psi) unless approved by
CSD. All other requirements shall conform to ASTM A234 WPB.

7.2.3 The carbon equivalent (CE) shall not exceed 0.42% when calculated
according to the formula:

15
)(

5
)(

6
)(

CuNiVMoCrMn
CIIWCE (1)

7.3 Grade X42 Through X70 Fittings

7.3.1 With the exception of the chemical composition requirements in
paragraph 7.3.2 and impact testing requirements in paragraph 7.3.3
below, the material shall conform to the requirements of MSS SP-75,
with Supplementary Requirements SR-4 for hardness only., SR-5
(actual yield strength limitation).

7.3.2 Chemical composition, including carbon equivalent, shall be in
accordance with the following table:


Table 2 – Chemical Composition
Requirement of Grade X42 through X70 Fittings



Chemical Requirements
Composition Weight %

Product Analysis
Carbon 0.20
Manganese 1.00–1.45
Phosphorus 0.030
Sulfur 0.010
Silicon 0.15–0.40 c
Nickel 0.50 d
Chromium 0.30 d
Molybdenum 0.25 d
Copper 0.35 d
Titanium 0.05
Vanadium 0.10
Columbium 0.04
Vanadium plus Columbium 0.12
Aluminum 0.06

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Document Responsibility: Materials and Corrosion Control 02-SAMSS-006
Issue Date: 5 October 2005
Next Planned Update: 1 November 2010 Hot Tap and Stopple Fittings



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A833.

11.5.2 A minimum of three hardness indentations shall be made on the parent
metal of each fitting, with the test locations spaced evenly across the
piece being tested. For extruded fittings one of the hardness shall be in
the outlet section. For fabricated fittings, an additional three hardness
indentations shall be made, evenly spaced, along the weld. Where
accessible, the weld metal hardness should be measured on the I.D.
surface of the fittings.

11.5.3 The hardness shall not exceed 236 HB. If any single indentation
exceeds the allowable hardness limit, two additional hardness
indentations shall be taken within 25 mm of the first reading, and the
three hardness values shall be averaged. If the average exceeds the
allowable limit, the fitting shall be rejected, and all the other fittings
from the same heat shall be 100% hardness tested.

11.5.4 At the manufacturer's option, all fittings that have failed the hardness
test requirements in paragraphs 11.5.3 may be re-heat treated and
hardness tested again. The second heat treatment shall be equivalent to
the original heat treatment unless additional production test coupons
are made to verify all the required mechanical properties are met. Any
second heat treatment must still comply with the original welding
procedure essential and supplementary essential variables. Fittings that
pass the hardness test requirements and the strength requirements after
re-heat treatment may be accepted. Fittings that fail a second time
shall be permanently rejected.

11.6 Production Tensile Test

A tensile test shall be performed on one specimen per lot of extruded fitting
production and shall meet the requirements of the basic specification.

12 Marking

12.1 The fittings shall be marked with a 100 mm wide painted band around top and
bottom half at one end in order to facilitate matching during field installation.

12.2 Top and bottom halves shall be stencil-marked with Saudi Aramco Purchase
Order number, item number, nominal size, type of material, maximum allowable
operating pressure, hydrotest pressure, fitting weight, and actual Carbon
Equivalent of the header material. The stenciled marking shall be made on the
inside and outside of the fitting run. For LOR plugs, the Purchase Order number
and the item number shall be stenciled on the top (outer) surface.

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Document Responsibility: Materials and Corrosion Control 02-SAMSS-006
Issue Date: 5 October 2005
Next Planned Update: 1 November 2010 Hot Tap and Stopple Fittings



Page 17 of 17

The top and bottom halves shall also be die-stamped, using low stress stamps,
with the Purchase Order and item number. The stamping shall be adjacent to the
stencil-marks.

12.3 Fittings purchased for non-sour service shall be identified by painting a white
longitudinal stripe for the full length of the fitting. The stripe shall be 50 mm on
the outside surface of both halves. Fittings purchased for sour service shall be
stenciled "for sour service."

12.4 Hot tap and stopple fittings shall have the maximum allowable operating
pressure and temperature die-stamped on the flange rim. The die stamping shall
be made on the bottom run as well as the flange run of the fitting.

13 Preparation for Shipment

Export packing, marking and shipping shall be in accordance with the Purchase Order.

14 Material Selection and Testing Subcommittee


Graham Lobley Coordinator

Abdullah Al-Rumaih Member

Fahad Al-Bash Member

Olavo Dias Member

Muhsen Al-Sannaa Member

Mauyed Mehdi Member

Nasser Balhareth Member

Khalid Al-Nabulsi Member

Robin Tems Member

Abdelhak Kermad Member

Brian Burgess Member

Hojin Choi Member

Gregory Stark Member

Wajdi Al-Mugbel Member



Revision Summary
5 October 2005 Major revision.

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