ARABIAN GULF OIL COMPANY

TECHNICAL AFFAIRS DEPARTMENT

CORROSION PROTECTION & TECHNICAL INSPECTION COORDINATION

PRELIMINARY Requested by: LIBYANA Co. (East Region)

INSPECTION REPORT Report No.: TPI/2018/IR001
(QC Check) Location: Libyana Warehouse- Benghazi
Date : December 28th ,2018
Subject of Inspection: New Antenna Towers Steel Structure Components

Vendor/ Supplier: Huawie Technologies Co. Ltd. Design Code/ Standard: ANSI/ TIA-222-G
Designed/ Manufactured by: Goldeed Development Ltd. Structural Standard for Antenna Supporting Structures and Antennas
Project: Libyana-East Region Network 2G3G Expansion & Swap Phase I

Structural Steel Material: Carbon Steel Coating Type: Zinc-Coating (Hot-Dip Galvanizing)

Inspection Results & Comments

Introduction:
Inspection of the new hot-dip galvanized steel structure products has been carried-out at Libyana
warehouse on 23-26/12/2018 as part of Third Party Inspection to assess the quality of the delivered
material in compliance with specifications & requirements outlined in ISO-1461and ASTM-A123.
-Random sampling specimens were taken from each article lot for inspection, see the summary.
Note: All contents of this report are based on materials found in warehouse during the time of inspection.
Extent of Inspection:
Visual inspection, UT ultrasonic thickness measurement, galvanizing layer thickness measurement.
Welding inspection was limited to visual inspection only (other Non Destructive Testing NDT techniques
can not be performed; these tests are usually performed before galvanization).
Inspection Findings:
- Unsatisfactory steel fabrication and welding was noticed. Moreover, welding joints were inspected
visually and defects were observed. Refer to the summary below.
- Poor quality galvanization applied on the vicinity of steel products.
- Flanges do not meet the code requirements. The existing flanges were fabricated from sheet metal. Steel
flanges should be of standard forged type as per ASME B16.5
- Surface finish on some products was found in bad condition.
- Slight spot mechanical damages of galvanizing layer on some parts.
- Hot-dip galvanizing several defects were noted.

Conclusion & Recommendation

Based on the inspection results, and the limited documentation provided, the following can be concluded:
- 18m stub tower main part no. HW-52235660-RT18B1-L1A/B/C/D/E-HF, quantity 90 pcs are rejected
conditionally and repairs must be performed.
- All other parts were inspected as directed by specifications and the minimum requirements have been met
(accepted)
- Repairs of galvanizing shall be in accordance with ASTM Standard A780, using zinc-rich paint.
- Welding repairs shall be in accordance with AWS D1.1 Structural Welding Code-Steel.
- Acceptable dimensional tolerances shall be determined from ASTM A6.
Note: The results above mentioned are limited and in order to perform a complete assessment and issue a Final
Inspection Report (Release Note) we will need to review complementary documentation from the manufacturer.
Best Regards,
Inspected by:
Mourad Almoudi Cristian Dediu
AGOCO Welding, Painting and NDT Inspector NDT Specialist Level III (Certificate No. NdTT/010.2/SNT)
API 510 Authorized Inspector (Certificate No. 61350)

Page 1 of 5
Testing equipments used:
 DANATRONIC ECHO9 – Ultrasonic Thickness Gauge
 ELCOMETER 456- Coating Thickness Gauge
 Visual Inspection Tools
Towers:
18m Rooftop Stub Tower
15m Rooftop Pole Tower
30m 4-legged angle steel Self Support Tower SST
45m 4-legged angle steel Self Support Tower SST

Reference Codes & Standards:

 ANSI/ TIA-222-G: 2005 Structural Standard for Antenna Supporting Structures and Antennas
 AWS D1.1: 2015 Structural Welding Code – Steel
 ASME Section V: 2017 Nondestructive Examinations
 ISO 1461: 2009 Hot dip galvanized coatings on fabricated iron and steel articles
Related ASTM Specifications:
 ASTM A123 Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products
 ASTM A153 Specification for Zinc Coating (Hot-Dip) on Iron and Hardware
 ASTM A767 Specification for Zinc-Coated (Galvanized) Steel Bars for Concrete Reinforcement
 ASTM A780 Practice for Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings
 ASTM A385 Practice for Providing High-Quality Zinc Coatings (Hot-Dip)

Mandatory Documents required to perform complete assessment of steel structure:

- Steel Structure Welding Specification Procedures (WPS) and Procedure Qualification

Records (PQR), Welders Qualifications Reports
- Steel Structure Preparation and Galvanizing Procedures
- Steel Structure Manufacture Quality Control Plan
- Quality Compliance Certificate
- Material Specification Data Report
- Quality Inspection Reports for Welding And Galvanizing

Page 2 of 5
 SUMMARY:

1. HW-52235653- I beam ( H beam HEA 260), height 250mm, width 250mm, length 1m
Packed as 9 pieces / set
Randomly choose 6 pieces from different sets were tested and found as follow:
Visual inspection shown uniform and smooth zinc layer
Galvanization thickness measurements found values between 88µm and 174 µm

2. HW-52235396- Tower Accessory antenna mount type1,Thickness:3mm,pipe3.0'' , L3000mm, with

mounting kit
Packed as 15 pieces / set
Randomly choose 6 pieces from different sets were tested and found as follow:
Visual inspection shown uniform and smooth zinc layer
Galvanization thickness measurements found values between 78µm and 160 µm

3. HW-52235839- MW antenna support, Thickness 4mm, pipe 3.0" ,L1000mm, with mounting kit
Packed as 15 pieces / set
Randomly choose 6 pieces from different sets were tested and found as follow:
Visual inspection shown uniform and smooth zinc layer
Galvanization thickness measurements found values between 115µm and 165 µm

4. HW-52235838- MW antenna support, Thickness 4mm,pipe.4.0" , L2000mm, with mounting kit

Randomly choose 3 pieces from different sets were tested and found as follow:
Visual inspection shown uniform and smooth zinc layer
Galvanization thickness measurements found values between 126µm and 176 µm

5. HW-52235837- Tower Accessory, Galvanized Cable Tray with cover, Width 400mm,Height 100mm,
2m per section.
Packed as 10 pieces / set
Randomly choose 6 pieces from different sets were tested and found as follow:
Visual inspection shown uniform and smooth zinc layer
Galvanization thickness measurements found values between 85µm and 220 µm

6. HW-52235393- Tower Accessory, Cable ladder support, Fixed support with Height(0.3m)
Packed as 50 pieces / set
Randomly choose 6 pieces from different sets were tested and found as follow:
Visual inspection shown uniform and smooth zinc layer
Galvanization thickness measurements found values between 85µm and 150 µm

7. HW-52235857- self support tower, tower height 30m, wind load 12m2, 4 leg lattice tower type
Packed as 4 pieces / set, 10 pieces / set, 16 pieces / set, 30 pieces / set, 50 pieces / set
Randomly choose 15 pieces from different sets were tested and found as follow:
Visual inspection shown uniform and smooth zinc layer
Galvanization thickness measurements found values between 85µm and 200µm

Page 3 of 5
8. HW-52235660- roof top stub tower, tower height 18m, wind load 6m^2
Packed as 10 pieces / set, 50 pieces / set
Randomly choose 15 pieces from different sets were tested and found as follow:
Piece no. : A6- welded joint between flange and 2″Ø pipe found with traces of rust
Piece no. : A35- found with traces of rust inside 2″Ø pipe
Piece no. : A42- welded joint between flange and 2″Ø pipe found with pin hole
Piece no. : A7- welded joint between flange and 2″Ø pipe found with undercuts
Piece no. : E2- welded joint between flange and 2″Ø pipe found with porosity and rust
Piece no. : E4- welded joint between flange and 2″Ø pipe found with pin hole
Piece no. : E3- welded joint between flange and 2″Ø pipe found with excess weld
Piece no. : E1- welded joint between flange and 2″Ø pipe found with traces of rust
Piece no. : A1- welded joint between flange and 2″Ø pipe found with
Piece no. : A45- welded joint between flange and 2″Ø pipe found with welding wire inside
Piece no. : A30- Galvanized surface found in unsatisfactory condition in small areas with maximum
recorded thickness of 420 µm
Piece no. : C8- Galvanized surface found in unsatisfactory condition in small areas

Galvanization thickness measurements found values between 87µm and 220 µm

9. HW-52235663- roof top stub tower, tower height 15m, wind load 6m^2
Packed as 18 pieces / set, 32 pieces
Randomly choose 6 pieces from different sets were tested and found as follow:
Visual inspection shown uniform and smooth zinc layer
Galvanization thickness measurements found values between 100µm and 233µm

Page 4 of 5
STANDARDS APPENDIX:
ASTM A123

ASTM A153

BS EN ISO 1461

Page 5 of 5
 18m stub tower 10 sets

Total Detailed HDG Avg. Inspection

BUNDLE NO. DESCRIPTION Bundle Qty NOTE Thk. µm Result
QTY

50
HW-52235660-RT18B1-L1A-HF 50 Each Tower 5 sections 174-420
MAIN PIPE BUNDLES

10
HW-52235660-RT18B1-L1B-HF 10 Each Tower 1 section
MAIN PIPE BUNDLES
Touch Up
10
HW-52235660-RT18B1-L1C-HF 10 Each Tower 1 section Repair
MAIN PIPE BUNDLES
87-210 Required
10
HW-52235660-RT18B1-L1D-HF 10 Each Tower 1 section
MAIN PIPE BUNDLES

10
HW-52235660-RT18B1-L1E-HF 10 Each Tower 1 section
MAIN PIPE BUNDLES

10
HW-52235660-RT18B1-1/18-HF 40 Each Tower 1 bundel Accepted
BRACING TUBE BUNDLES
118-266
10
HW-52235660-RT18B1-2/18-HF 40 Each Tower 1 bundel Accepted
BRACING TUBE BUNDLES
Touch Up
10
HW-52235660-RT18B1-3/18-HF 200 Each Tower 1 bundel 106-199 Repair
BRACING TUBE BUNDLES
Required

10
HW-52235660-RT18B1-4/18-HF STEEL PLATE,ANGLE 330 Each Tower 1 bundel 110-148 Accepted
BUNDLES
STEEL,CHANEL STEEL

10
HW-52235660-RT18B1-6/18-HF HORIZONTAL CABLE TRAY
BUNDLES
40 Each Tower 1 bundel - -
BRACKET

10
HW-52235660-RT18B1-7/18-HF 300 Each Tower 1 bundel Accepted
HORIZONTAL CABLE TRAY BUNDLES
90-130

10
HW-52235660-RT18B1-8/18-HF HORIZONTAL CABLE TRAY 30 Each Tower 1 bundel Accepted
BUNDLES
COVER

10
HW-52235660-RT18B1-9/18-HF 160 Each Tower 1 bundel 77-100 Accepted
ANCHOR BOLTS BUNDLES

10
HW-52235660-RT18B1-10/18-HF
ANCHOR BOLTS BUNDLES
160 Each Tower 1 bundel - -

10
HW-52235660-RT18B1-11/18-HF ANCHOR PLATE & ANGLE
BUNDLES
120 Each Tower 1 bundel - -
STEEL

10
HW-52235660-RT18B1-12/18-HF
BOLTS & NUTS BUNDLES
160 Each Tower 1 bag - -
10
HW-52235660-RT18B1-13/18-HF
BOLTS & NUTS BUNDLES
5060 Each Tower 1 bag - -
10
HW-52235660-RT18B1-14/18-HF
COPPER ROB BUNDLES
30 Each Tower 1 pcs - -
10
HW-52235660-RT18B1-15/18-HF
COPPER STRAP BUNDLES
10 Each Tower 1 bundel - -
 30m SST Tower 10 sets

Detailed HDG Avg. Thk. Inspection

Total Bundle
BUNDLE NO. DESCRIPTION Qty µm Result
QTY

10
HW-52235857-30B1-1/25-HF 240 159-259 Accepted
MAIN MEMBER BUNDLES

10
HW-52235857-30B1-2-/25HF 280 100-156 Accepted
ANGLE STEEL BUNDLES

10
HW-52235857-30B1-3/25-HF
ANGLE STEEL BUNDLES
1360 - -
10
HW-52235857-30B1-4/25-HF 1060 98-145 Accepted
ANGLE STEEL BUNDLES

10
HW-52235857-30B1-5/25-HF 70 76-140 Accepted
BUNDLES

10
HW-52235857-30B1-6/25-HF 1500 74-200 Accepted
PLATE BUNDLES
10
HW-52235857-30B1-7/25-HF
TOWER LEGS BUNDLES
40 - -
10
HW-52235857-30B1-8/25-HF 2320 84-147 Accepted
LADDER BUNDLES
10 Touch up
HW-52235857-30B1-9/25-HF 420 80-136
HOOP BUNDLES repair
10
HW-52235857-30B1-11/25-HF HORIZONTAL CABLE TRAY 40 100-120 Accepted
BUNDLES
BRACKET
10
HW-52235857-30B1-12/25-HF 300 70-140 Accepted
HORIZONTAL CABLE TRAY BUNDLES
10
HW-52235857-30B1-13/25-HF 30 100-130 Accepted
BUNDLES
10 Touch up
HW-52235857-30B1-14/25-HF 160 40-200
ANCHOR BOLTS BUNDLES repair
10
HW-52235857-30B1-15/25-HF 40 120-140 Accepted
ANCHOR PLATE BUNDLES
10
HW-52235857-30B1-16/25-HF
ANCHOR PLATE BUNDLES
40 - -
10
HW-52235857-30B1-17/25-HF 120 Bare Steel -
ANGLE STEEL BUNDLES
10
HW-52235857-30B1-18/25-HF
BOLTS & NUTS BUNDLES
550 -
10
HW-52235857-30B1-19/25-HF 2170 - -
BOLTS & NUTS BUNDLES
 15m pole 8 sets

Detailed HDG Avg. Inspection

BUNDLE NO. DESCRIPTION Qty Thk. µm Result
Total Bundle

8
HW-52235663-RT15B1-1/18-HF 8
MAIN PIPE BUNDLES

8
HW-52235663-RT15B1-2/18-HF 8
MAIN PIPE BUNDLES 70-208 Accepted
8
HW-52235663-RT15B1-3/18-HF 8
MAIN PIPE BUNDLES

8
HW-52235663-RT15B1-4/18-HF 8
MAIN PIPE BUNDLES

8
HW-52235663-RT15B1-5/18-HF 144 100-200 Accepted
ANGLE STEEL BUNDLES

8
HW-52235663-RT15B1-6/18-HF 664 120-225 Accepted
PLATE BUNDLES

8
HW-52235663-RT15B1-7/18-HF 8 - -
LIGHTNING ROB BUNDLES

8
HW-52235663-RT15B1-8/18-HF 32 - -
HORIZONTAL CABLE TRAY BRACKET BUNDLES

8
HW-52235663-RT15B1-9/18-HF 240 77-100 Accepted
HORIZONTAL CABLE TRAY BUNDLES

8
HW-52235663-RT15B1-10/18-HF 24 80-190 Accepted
HORIZONTAL CABLE TRAY COVER BUNDLES

8
HW-52235663-RT15B1-11/18-HF 96 - -
ANCHOR BOLTS BUNDLES

8
HW-52235663-RT15B1-12/18-HF 24 - -
ANCHOR PLATE BUNDLES

8
HW-52235663-RT15B1-13/18-HF 3456 - -
BOLTS & NUTS BUNDLES
 Towers Accessories
HDG
HDG Avg. Inspection
Type Item Description min./max.
Thk. (µm) Result
Thk. (µm)
I beam ( H beam HEA 260), height
1m I beam 52235653 88-174 131 Accepted
250mm, width 250mm, length 1m
Tower Accessory,RF antenna mount
3m RF pole 52235396 type1,Thickness:3mm,pipe3.0'' , L3000mm, 78-160 119 Accepted
with mounting kit
MW antenna support, Thickness 4mm, pipe
MW pole 1m 52235839 115-165 140 Accepted
3.0" ,L1000mm, with mounting kit
MW antenna support, Thickness
MW pole 2m 52235838 4mm,pipe.4.0" , L2000mm, with mounting 126-176 151 Accepted
kit
Tower Accessory,Galvanized Cable Tray
Cable tray 52235837 with cover,Width 400mm,Height 100mm, 85-220 152 Accepted
2m per section.
Tower Accessory,Cable ladder
Cable ladder support 52235393 85-150 117 Accepted
support,Fixed support with Height(0.3m)

HDG: Hot-Dip Galvanizing

 Photo Appendix:

HW-5223563A-29/41-HF HW-52235837-31/77-HF HW-52235663-RT15B1-10/18-HF HW-52235663-RT18B1-1/18-HF

HW-52235839-1/3-HF HW-52235837-9,10,14/77-HF HW-52235397-1/5-HF HW-52235839-2/3-HF

HW-52235837-1/77-HF HW-52235396-2/3-HF Zinc splatter

HW-52235857-30B1-6/25-HF HW-52235857-30B1-11/25-HF HW-52235857-30B1-15/25-HF HW-52235393-10/17-HF

HW-52235396-1/3-HF HW-52235857-30B1-4/25-HF HW-52235663-RT15B1-9/18-HF HW-52235857-30B1-3/25-HF

HW-52235857-30B1-2/25-HF HW-52235857-30B1-8/25-HF HW-52235660-RT18B1-3/18-HF HW-52235857-30B1-1/25-HF

HW-52235857-30B1-17/25-HF HW-52235857-30B1-9/25-HF HW-52235857-30B1-5/25-HF HW-52235857-30B1-14/25-HF

HW-52235660-RT18B1-HF

Stub Tower General View Pipe internal rust spot Welding porosity & rust spots

Welding porosity & rust bleeding Rust stains at fillet weld Excessive clustered welding Spatter Underfill fillet weld

Welding wire Mechanical damage Welding undercut Zinc Flux deposits

Welding porosity Welding wire Excessive welding Weld weeping

Welding repair of flange Irregular galvanizing surface (pimples/ blisters), thick layer Welding corrosion
Pipe internal corrosion (bare spots) Zinc splatter Drainage spikes Irregular weld

HW-52235663-4/18-HF (Pole Tower)

General view Welding underfill Welding spatter