หน้า 1 จาก 1 Translation August 13, 2019 Subject: Management explanation and analysis for Quarter ended 30 June 2019 Attn: The Managing Director, the Stock Exchange of Thailand Pacific Pipe Public

Attn : The Directors and The MAI Manager Ref: Dimet AC 0818/1 August 27, 2018 Attention: The Directors and The MAI Manager The Stock Exchange of Thailand Subject: Year End result and clarification of

หนา้ 1 จาก 1 Translation November 13, 2019 Subject: Management explanation and analysis for Quarter ended 30 September 2019 Attn: The Managing Director, the Stock Exchange of Thailand Pacific Pipe

หนา้ 1 จาก 1 Translation May 13, 2020 Subject: Management explanation and analysis for Year ended 31 March 2020 Attn: The Managing Director, the Stock Exchange of Thailand Pacific Pipe Public Company

AC 52/07-003 ACC1/19-055 November 11, 2019 Subject: Management Discussion and Analysis Quarter 3 Ending September 30, 2019 To: Director and Managing Director The Stock Exchange of Thailand Qualitech

หน้า 1 จาก 1 Translation May 8, 2018 Subject: Management explanation and analysis for Quarter ended 31 March 2018 Attn: The Managing Director, the Stock Exchange of Thailand Pacific Pipe Public

หน้า 1 จาก 1 Translation February 22, 2019 Subject: Management explanation and analysis for Year ended 31 December 2018 Attn: The Managing Director, the Stock Exchange of Thailand Pacific Pipe Public

International Company Limited from existing shareholders as the Stock Exchange of Thailand queried Attn.: The President The Stock Exchange of Thailand As per queried by the Stock Exchange of Thailand (SET) on

Date : August 11, 2017 Subject : The Explanation to SET concerning the operating result for Q2/2017 more than 20% Attention : The Director and Manager of the Stock Exchange of Thailand For the Q2

Director and Manager The Stock Exchange of Thailand The Company would like to report the Company’s operating result for the 1st Quarter ended March 31, 2018 that total revenue was THB8.24 million decreased